All Calculators 161+
Your complete toolkit for life's calculations. From financial planning to health metrics, scientific computations to everyday conversions — find the perfect calculator for any task.
Finance
47 calculators401k - Maximize Your Retirement Savings
Free 401k calculator to estimate retirement savings, employer match benefits, and tax advantages. See how contribution changes affect your future.
Amortization - Loan Payment Schedule
Free amortization calculator to create loan payment schedules. Calculate monthly payments, interest, and principal breakdown for mortgages and loans.
APR - Calculate Annual Percentage Rate
Free APR calculator to determine the true annual cost of loans including fees. Compare loan offers and understand the real interest rate you're paying...
Break-Even - Calculate Break-Even Point, Units & Revenue
Free break-even calculator to find how many units you need to sell or revenue required to cover costs. Includes break-even analysis and profit project...
Budget - Plan Your Monthly Finances
Free budget calculator to plan monthly spending, track income vs expenses, and see where your money goes. Build a budget that works for you.
Capital Budgeting - Investment Decision Analysis
Free capital budgeting calculator with NPV, IRR, and payback period. Evaluate investment projects and make better capital allocation decisions.
Car Loan - Calculate Auto Loan Payments
Free car loan calculator to estimate monthly payments, total interest, and affordability. Compare new vs used car financing options.
Cash Flow to Common Stockholders | Equity Analysis
Calculate cash flow to common stockholders. Analyze dividends, buybacks, and equity issuances with our free financial calculator.
Cash Flow to Stockholders - Shareholder Returns
Free cash flow to stockholders calculator. Calculate dividends paid plus stock repurchases minus new equity issued to measure shareholder distribution...
Compound Interest - Calculate Investment Growth
Free compound interest calculator to see how your money grows over time. Calculate future value, total interest earned, and compare compounding freque...
Compound Investment | Calculate Investment Growth
Calculate compound investment returns with regular contributions. See how your money grows over time with our free investment calculator.
Cumulative Cash Flow - Track Cash Over Time
Free cumulative cash flow calculator to track total cash flow over multiple periods. Calculate payback period and project cash flow breakeven.
Current Ratio - Measure Liquidity & Short-Term Health
Free current ratio calculator to assess company liquidity. Calculate the ratio of current assets to current liabilities for financial analysis.
Debt Payoff - Snowball vs Avalanche Strategy
Free debt payoff calculator comparing snowball and avalanche methods. See how fast you can become debt-free and how much interest you'll save.
Debt-to-Equity Ratio - Measure Financial Leverage
Free debt-to-equity ratio calculator. Analyze company leverage by comparing total debt to shareholder equity for investment decisions.
Debt-to-Income - Calculate DTI Ratio for Loans
Free debt-to-income (DTI) calculator to assess your loan eligibility. Calculate front-end and back-end DTI ratios for mortgages, personal loans, and c...
Depreciation - Straight Line, Declining Balance & More
Free depreciation calculator for assets. Calculate straight-line, declining balance, sum-of-years digits, and units of production depreciation with sc...
Discount - Calculate Sale Price, Savings & Percentage Off
Free discount calculator to find sale price after percentage off, calculate savings, and determine original price. Perfect for shopping, sales, and re...
Dividend - Calculate Dividend Income & Growth
Free dividend calculator to estimate dividend income, yield, and growth with reinvestment (DRIP). Plan your passive income portfolio.
Dividend Payout Ratio - Shareholder Returns
Free dividend payout ratio calculator to analyze dividend policy. Calculate what percentage of earnings a company pays as dividends.
Dividend Yield - Calculate Stock Income Returns
Free dividend yield calculator to measure income return on stocks. Calculate annual yield percentage and compare dividend-paying investments.
EBIT - Earnings Before Interest & Taxes
Free EBIT calculator to measure operating profitability. Calculate earnings before interest and taxes for business valuation and financial analysis.
EBITDA - Calculate Operating Profitability
Free EBITDA calculator to measure operating profitability. Calculate earnings before interest, taxes, depreciation, and amortization.
Fixed APR | Calculate Fixed Annual Percentage Rate
Calculate fixed APR for loans and credit cards. Understand true borrowing costs with our free fixed annual percentage rate calculator.
GDP Income - National Income Approach
Free GDP income approach calculator. Calculate Gross Domestic Product using wages, rent, interest, and profits—total income earned in production.
Goodwill to Assets Ratio | Intangible Asset Analysis
Calculate goodwill to total assets ratio. Analyze acquisition premiums and intangible asset exposure with our free calculator.
Gross Profit - Calculate Gross Profit Margin & Revenue
Free gross profit calculator to determine gross profit, gross margin percentage, cost of goods sold, and revenue. Essential for business profitability...
Hourly to Salary - Convert Wages to Annual Pay
Free hourly to salary calculator. Convert hourly wage to annual salary or salary to hourly rate. See weekly, bi-weekly, and monthly equivalents.
Income Tax - Estimate Your Federal Tax
Free income tax calculator to estimate your federal tax liability, effective tax rate, and take-home pay based on 2024 tax brackets.
Investment - Calculate Investment Growth & Returns
Free investment calculator to project portfolio growth, compare strategies, and see how regular contributions compound over time.
Loan - Calculate Monthly Payments & Interest
Free loan calculator to estimate monthly payments, total interest, and amortization. Works for personal loans, auto loans, and more.
Loan Repayment - Payment Schedule & Payoff
Free loan repayment calculator. Calculate monthly payments, total interest, and payoff timeline for any loan with amortization breakdown.
Loan-to-Value (LTV) - Mortgage & Equity Analysis
Free LTV calculator to determine loan-to-value ratio. Calculate equity position, PMI requirements, and refinancing eligibility for mortgages.
Margin - Calculate Profit Margin, Cost & Revenue
Free online margin calculator to compute profit margin percentage, cost, revenue, and gross profit. Includes margin vs markup comparison and business ...
Markup - Calculate Price Markup & Selling Price
Free markup calculator to determine selling price from cost and markup percentage. Includes markup vs margin comparison and retail pricing strategies.
Mortgage - Calculate Monthly Payments & Amortization
Free mortgage calculator to estimate monthly payments, total interest, and amortization schedule. Compare loan terms and see how extra payments save m...
Mortgage Payoff - Early Payoff & Savings
Free mortgage payoff calculator. Calculate how extra payments reduce your mortgage term and interest, and find the fastest path to becoming mortgage-f...
Net Worth - Calculate Your Total Wealth
Free net worth calculator to track your financial health. Add up assets and subtract liabilities to see your true net worth and wealth progress.
Paycheck - Calculate Your Take-Home Pay
Free paycheck calculator to estimate your net pay after taxes and deductions. See federal, state, and FICA taxes on your paycheck.
Personal Loan - Calculate Monthly Payments
Free personal loan calculator to estimate monthly payments, total interest, and payoff schedule. Compare loan offers and find the best terms.
Restaurant EBITDA - Profitability Analysis
Free restaurant EBITDA calculator. Calculate earnings before interest, taxes, depreciation, and amortization to measure restaurant operating performan...
ROI - Calculate Return on Investment
Calculate Return on Investment (ROI) for business and personal investments. Get ROI percentage, annualized returns, and net gain.
Salary - Convert Hourly, Weekly, Monthly, Annual Pay
Free salary calculator to convert between hourly, weekly, bi-weekly, monthly, and annual pay. Compare job offers and understand your true compensation...
Sales Tax - Calculate Tax Amount & Total
Free sales tax calculator to determine tax amount, pre-tax price, or total price. Includes state tax rates and reverse tax calculations.
Simple Interest - Calculate Interest and Principal
Free simple interest calculator. Calculate interest earned, total amount, and principal. Perfect for loans, savings, and financial planning.
Stock Profit - Calculate Investment Gains & Losses
Free stock profit calculator to calculate your gains, losses, and return on investment. Factor in commissions and see your net profit.
VAT - Calculate Value Added Tax, Net & Gross Price
Free VAT calculator to add or remove Value Added Tax. Calculate net price, gross price, and VAT amount for UK, EU, and international tax rates.
Everyday Life
69 calculatorsAccounts Receivable Turnover - Collection Efficiency
Free AR turnover calculator to measure collection efficiency. Calculate how quickly your business collects outstanding receivables.
Amps to kW - Convert Amperes to Kilowatts
Free amps to kilowatts calculator for single-phase and three-phase AC. Convert electrical current to power with voltage and power factor inputs.
Area - Square Feet, Meters, Acres, Hectares
Free area converter for square feet, square meters, acres, hectares, and more. Convert land area and surface measurements instantly.
ATP | Adenosine Triphosphate Energy Calculator
Calculate ATP production and energy yield from glucose metabolism. Understand cellular respiration with our free biology calculator.
Baking Conversions | Kitchen Measurement
Convert baking measurements between cups, grams, ounces, and tablespoons. Free kitchen conversion calculator for precise baking.
Bandwidth - Download Time & Data Transfer
Free bandwidth calculator to estimate download times, data transfer rates, and required bandwidth for streaming, backups, and file transfers.
Benjamin Graham Formula | Intrinsic Value Analysis
Calculate intrinsic stock value using Benjamin Graham's formula. Apply value investing principles with our free calculator.
Board Foot - Lumber Volume & Pricing
Free board foot calculator for lumber measurement. Calculate board feet from dimensions, estimate lumber costs, and plan woodworking projects.
Book Value Per Share - Equity Analysis
Free BVPS calculator to determine book value per share. Calculate shareholder equity value for stock analysis and intrinsic value assessment.
Butter - Sticks, Cups, Grams, Ounces, Tablespoons
Free butter converter between sticks, cups, grams, ounces, and tablespoons. Perfect for baking recipes with different measurement systems.
Cat Years
Calculate cat years calculator
Concrete - Calculate Cubic Yards and Bags Needed
Free concrete calculator to estimate cubic yards and bags of concrete needed for your project. Calculate slabs, footings, columns, and stairs with mat...
Cost of Goods Sold (COGS) - Inventory Accounting
Free COGS calculator to determine cost of goods sold. Calculate inventory costs, gross profit, and cost accounting for business financial analysis.
Cost of Smoking - See What Cigarettes Really Cost
Free smoking cost calculator to see how much you spend on cigarettes yearly and over a lifetime. Calculate savings from quitting smoking.
Cups to Grams - Baking & Cooking Measurements
Free cups to grams converter for flour, sugar, butter, and other baking ingredients. Get accurate weight conversions for perfect recipes every time.
Customer Acquisition Cost (CAC) - Marketing ROI
Free CAC calculator to measure customer acquisition cost. Calculate marketing efficiency, LTV:CAC ratio, and payback period for business growth.
Days to Cover | Short Interest Ratio Analysis
Calculate days to cover (short interest ratio) for stocks. Analyze short selling pressure with our free financial calculator.
Dice Roller | Virtual Dice Simulator
Roll virtual dice online. Supports multiple dice types (d4, d6, d8, d10, d12, d20) for games and probability. Free dice roller.
Dog Years - Convert Dog Age to Human Years
Free dog years calculator to convert your dog's age to human years. Uses the latest scientific formula based on DNA methylation for accurate results.
DSCR - Debt Service Coverage Ratio
Free DSCR calculator to measure ability to service debt. Calculate debt service coverage ratio for loan qualification and financial analysis.
Electricity Bill - Estimate Your Power Costs
Free electricity cost calculator to estimate your monthly power bill. Calculate usage costs for appliances and find ways to save on electricity.
Employee Absence Rate | HR Analytics
Calculate employee absence rate and absenteeism metrics. Track workforce attendance with our free HR calculator.
Employee Turnover Rate - HR Analytics
Free employee turnover calculator to measure workforce retention. Calculate turnover rate, cost of turnover, and retention metrics for HR planning.
Energy - Joules, Calories, BTU, kWh Conversion
Free energy converter for joules, calories, kilocalories, BTU, kilowatt-hours, and more. Convert between energy and work units instantly.
EPS - Calculate Earnings Per Share
Free EPS calculator to determine earnings per share. Calculate basic and diluted EPS for stock analysis and valuation comparisons.
Expected Monetary Value (EMV) - Decision Analysis
Free EMV calculator for decision analysis under uncertainty. Calculate probability-weighted outcomes for better project and investment decisions.
Fisher Equation - Real vs Nominal Interest Rates
Free Fisher equation calculator to convert between real and nominal interest rates. Understand the relationship between inflation and interest rates.
Fixed Asset Turnover - Asset Efficiency Analysis
Free fixed asset turnover calculator to measure how efficiently a company uses property, plant, and equipment to generate sales.
Framing | Wall Stud & Lumber Estimator
Calculate wall framing materials including studs, plates, and headers. Free construction framing calculator.
Fuel Cost - Estimate Gas Expenses for Any Trip
Free fuel cost calculator to estimate gas expenses for road trips. Calculate trip costs, compare routes, and budget your travel fuel expenses accurate...
GDP Expenditure - National Output Analysis
Free GDP expenditure approach calculator. Calculate Gross Domestic Product using consumption, investment, government spending, and net exports.
GPA - Calculate Your Grade Point Average
Free GPA calculator to compute your grade point average. Add courses, credits, and grades to instantly calculate your cumulative and semester GPA.
Grade - Convert Scores to Letter Grades
Free grade calculator to convert percentage scores to letter grades and calculate weighted averages. Find your final grade with our easy-to-use tool.
Graham Number - Value Investing
Free Graham Number calculator for value investing. Calculate the maximum fair price for a stock using Benjamin Graham's conservative valuation formula...
Gravel - Calculate Tons and Cubic Yards Needed
Free gravel calculator to estimate tons, cubic yards, and bags of gravel for driveways, patios, and landscaping. Get coverage area and cost estimates.
Height - Feet/Inches to Centimeters, Meters
Free height converter between feet, inches, centimeters, and meters. Perfect for medical records, international comparisons, and everyday conversions.
Hourly to Annual Salary | Income
Convert hourly wages to annual salary. Calculate yearly, monthly, and weekly income from hourly rate. Free salary calculator.
Ideal Menu Price | Restaurant Food Pricing
Calculate ideal menu prices based on food cost percentage. Optimize restaurant pricing with our free menu calculator.
Inflation - Calculate Purchasing Power Over Time
Free inflation calculator to see how inflation affects your money. Calculate future prices, past values, and real investment returns adjusted for infl...
IRR - Internal Rate of Return Calculator
Free IRR calculator to determine the internal rate of return on investments. Compare project returns, evaluate investment profitability, and make info...
Market to Book Ratio | Stock Valuation Analysis
Calculate market to book ratio (price to book). Analyze stock valuation relative to book value with our free financial calculator.
MPC - Marginal Propensity to Consume
Free marginal propensity to consume (MPC) calculator. Calculate how much of additional income is spent vs saved—key for economic policy and multiplier...
Mulch - Calculate Cubic Yards and Bags Needed
Free mulch calculator to estimate cubic yards, bags, and coverage for landscaping. Calculate wood chips, bark mulch, rubber mulch, and more.
Net Dollar Retention - SaaS Revenue Metrics
Free net dollar retention (NDR) calculator for SaaS businesses. Calculate revenue retention including expansion, contraction, and churn to measure cus...
NPV - Net Present Value Calculator for Investments
Free NPV calculator to evaluate investment profitability. Calculate net present value, compare investment options, and make data-driven financial deci...
Overhead Rate - Cost Allocation Analysis
Free overhead rate calculator to determine indirect cost allocation. Calculate overhead rates for pricing, job costing, and manufacturing analysis.
P/E Ratio - Price-to-Earnings Analysis
Free P/E ratio calculator to evaluate stock valuation. Calculate price-to-earnings ratio and compare to market benchmarks for investment analysis.
Password Generator - Create Strong Secure Passwords
Free secure password generator to create strong, random passwords. Customize length, characters, and complexity for maximum security.
PMT - Calculate Loan & Annuity Payments
Free PMT calculator for loan and annuity payments. Calculate periodic payment amounts for mortgages, car loans, and investment annuities.
Price Elasticity - Demand Sensitivity Analysis
Free price elasticity of demand calculator. Calculate how quantity demanded changes when price changes for optimal pricing decisions.
Price-to-Book Ratio - Stock Valuation
Free P/B ratio calculator to compare stock price to book value. Calculate price-to-book for value investing and financial analysis.
Random Number Generator - Generate Random Numbers Instantly
Free random number generator to create random numbers within any range. Perfect for games, lotteries, raffles, and random selections.
Restaurant ROPBO | Return on Payroll & Benefits
Calculate Return on Payroll, Benefits & Occupancy for restaurants. Measure labor efficiency with our free ROPBO calculator.
Retirement - Plan Your Financial Future
Free retirement calculator to estimate how much you need to save for retirement. Calculate savings goals, withdrawal rates, and see if you're on track...
Return on Net Assets (RONA) - Asset Efficiency
Free RONA calculator to measure return on net operating assets. Calculate how efficiently a company uses its fixed assets and working capital.
ROA - Return on Assets Analysis
Free ROA calculator to measure how efficiently a company uses assets to generate profit. Calculate return on assets for financial analysis.
Roof Area | Roofing Square Footage
Calculate roof area and roofing squares needed. Estimate shingles, underlayment, and materials. Free roof calculator.
Roof Pitch | Rise, Run & Angle
Calculate roof pitch, angle, and slope from rise and run measurements. Free roof pitch calculator for roofers and builders.
RSI | Relative Strength Index Analysis
Calculate the Relative Strength Index (RSI) for technical analysis. Identify overbought and oversold conditions with our free calculator.
Savings - Calculate Future Savings Growth
Free savings calculator to project your savings growth with regular deposits. See how compound interest grows your money over time.
Soil - Calculate Cubic Yards and Bags for Gardens
Free soil calculator to estimate topsoil, garden soil, and potting mix needs. Calculate cubic yards, bags, and costs for raised beds and landscaping.
Temperature - Celsius, Fahrenheit, Kelvin Conversion
Free temperature converter for Celsius, Fahrenheit, Kelvin, and Rankine. Instantly convert between temperature scales with formulas and reference char...
Tip - Calculate Tips and Split Bills Easily
Free online tip calculator. Calculate tips, split bills, and determine per-person amounts. Includes tipping guides for different service levels and co...
Tire Size | Compare Tire Dimensions
Calculate and compare tire sizes. Find diameter, circumference, and speedometer differences. Free tire comparison tool.
Total Asset Turnover - Asset Efficiency Ratio
Free total asset turnover calculator to measure how efficiently a company uses all assets to generate revenue. Key DuPont analysis component.
Unit Conversion - All-in-One
Free universal unit converter for length, weight, volume, temperature, area, and more. Convert any measurement unit instantly with our comprehensive c...
Volume - Liters, Gallons, Cups, Milliliters
Free volume converter for liters, gallons, cups, milliliters, fluid ounces, and more. Perfect for cooking, science, and everyday conversions.
Water Intake - Daily Hydration Calculator
Free water intake calculator to determine your optimal daily hydration. Calculate how much water you need based on weight, activity level, and climate...
Weight Watchers Points - Estimate WW Points
Free calculator to estimate Weight Watchers-style points from calories, fat, fiber, and protein. Understand the points system for weight management.
Date & Time
9 calculatorsAge - Calculate Your Exact Age
Free age calculator to find your exact age in years, months, weeks, days, hours, and minutes. Calculate age from birthday or between any two dates.
Birthday Finder | Day of Week & Age
Find what day of the week you were born on and calculate your exact age in years, months, and days. Free birthday calculator.
Date Difference - Days Between Two Dates
Free date difference calculator. Find the number of days, weeks, months, and years between any two dates. Calculate time spans easily.
Day Counter | Days Between Dates
Count the number of days between two dates. Calculate business days, weekends, and total days. Free date calculator.
Due Date - Pregnancy Due Date Estimator
Free due date calculator to estimate when your baby will arrive. Calculate your pregnancy due date based on LMP, conception date, or IVF transfer date...
Food Cost Percentage - Restaurant Profitability
Free food cost percentage calculator for restaurants. Calculate actual food cost, ideal cost, and variance to improve kitchen profitability.
Gas Mileage - Calculate MPG and Fuel Efficiency
Free gas mileage calculator to find your vehicle's MPG. Calculate fuel efficiency, compare trips, and track your car's performance with our easy-to-us...
Percentage - Calculate Percentages Easily
Master all types of percentage calculations with our comprehensive tool. Calculate percentages, percentage changes, find parts and wholes with precisi...
Time - Add, Subtract & Calculate Time
Free time calculator to add and subtract hours, minutes, and seconds. Calculate time differences and convert between time units easily.
Math & Science
14 calculatorsAltman Z-Score - Bankruptcy Prediction
Free Altman Z-Score calculator to predict bankruptcy risk. Calculate financial distress probability using the proven Z-Score formula.
Combinations & Permutations | nCr & nPr
Calculate combinations (nCr) and permutations (nPr) for probability and statistics. Free combinatorics calculator.
Factorial - Calculate n! Instantly
Free factorial calculator to compute n! for any positive integer. Learn about factorial notation, formulas, and applications in permutations and combi...
Financial Math | TVM & Financial Functions
Calculate time value of money, present value, future value, and other financial functions. Free financial math calculator.
GCF - Greatest Common Factor Finder
Free GCF calculator to find the greatest common factor (GCD) of two or more numbers. Includes prime factorization and step-by-step solutions.
LCM - Least Common Multiple Finder
Free LCM calculator to find the least common multiple of two or more numbers. Includes prime factorization method and step-by-step solutions.
Logarithm - Calculate Log, Ln, and Custom Base Logs
Free logarithm calculator for natural log (ln), common log (log10), and any base. Solve log equations and understand exponential relationships.
Probability - Calculate Event Probability
Free probability calculator for single events, multiple events, conditional probability, and combinations. Essential for statistics, gaming, and data ...
Pythagorean Theorem - Find Triangle Sides
Free Pythagorean theorem calculator to find the missing side of a right triangle. Calculate hypotenuse or legs with step-by-step solutions.
Scientific - Advanced Math Calculator Online
Free online scientific calculator with trigonometry, logarithms, exponents, roots, and advanced functions. Perfect for students, engineers, and scient...
Speed | Distance, Time & Velocity
Calculate speed, distance, or time using the speed formula. Convert between units. Free physics speed calculator.
Standard Deviation - Calculate SD, Variance & Mean
Free standard deviation calculator for population and sample data. Calculate mean, variance, and standard deviation with step-by-step solutions.
Trigonometry - Sin, Cos, Tan & Inverse Functions
Free trigonometry calculator for sin, cos, tan and their inverses. Calculate angles, solve triangles, and convert between degrees and radians.
Z-Score - Calculate Standard Score & Probability
Free Z-score calculator to find standard scores, percentiles, and probability. Convert raw scores to z-scores and interpret statistical significance.
Health & Fitness
22 calculatorsArmy Body Fat - U.S. Military Tape Test Method
Calculate your body fat percentage using the official U.S. Army tape test method. Check if you meet military body composition standards with our free ...
BAC - Blood Alcohol Content Estimator
Free BAC calculator to estimate your blood alcohol content. Calculate how alcohol affects you based on drinks, weight, gender, and time.
Bench Press - Estimate 1RM & Max Strength
Free bench press calculator to estimate your one-rep max (1RM) from multiple reps. Calculate max weight and training percentages for strength programs...
Blood Donation | Eligibility & Next Donation Date
Check your blood donation eligibility and calculate when you can donate next. Free blood donation interval calculator.
BMI - Calculate Your Body Mass Index
Free BMI calculator to determine if your weight is healthy. Calculate Body Mass Index with our easy-to-use tool, view your BMI category, and get perso...
BMR - Calculate Your Basal Metabolic Rate
Free BMR calculator using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle equations. Find how many calories your body burns at rest for weight man...
Body Fat - Calculate Your Body Fat Percentage
Free body fat calculator using the U.S. Navy method. Calculate body fat percentage with measurements of neck, waist, and hip circumference for accurat...
Calorie - Calculate Your Daily Calorie Needs
Free calorie calculator to find how many calories you need daily. Calculate calories for weight loss, maintenance, or gain based on your body and acti...
Heart Rate - Target Heart Rate Zones
Free heart rate calculator to find your maximum heart rate and target training zones. Calculate optimal heart rate for fat burning, cardio, and perfor...
Ideal Weight - Find Your Healthy Weight Range
Free ideal weight calculator using Devine, Robinson, Miller, and Hamwi formulas. Find your healthy weight based on height, gender, and frame size.
Lean Body Mass - Calculate LBM & Fat-Free Mass
Free lean body mass calculator using multiple formulas. Calculate your fat-free mass, muscle mass, and body composition for fitness goals.
Macro - Calculate Your Daily Macronutrients
Free macro calculator to determine your ideal protein, carbs, and fat intake. Get personalized macronutrient ratios based on your goals: weight loss, ...
One Rep Max - 1RM Strength Calculator
Free one rep max calculator to estimate your 1RM for any lift. Uses Epley, Brzycki, and other formulas to calculate max strength from any rep range.
Ovulation - Fertile Window & Ovulation Predictor
Free ovulation calculator to predict your most fertile days. Track your menstrual cycle and find the best days to conceive with our fertility calculat...
Pace - Running & Cycling Speed Calculator
Free running pace calculator. Calculate your pace, finish time, or distance for running and cycling. Get pace splits for 5K, 10K, half marathon, and m...
Pregnancy - Due Date & Week Calculator
Free pregnancy calculator to estimate your due date, current week, and trimester. Track your pregnancy journey with our accurate pregnancy week calcul...
Pregnancy Due Date | Expected Delivery Date
Calculate your pregnancy due date based on last menstrual period or conception date. Track pregnancy milestones free.
Protein - Daily Protein Intake Calculator
Free protein calculator to determine your optimal daily protein intake. Get personalized protein recommendations based on your weight, activity level,...
Sleep - Find Your Optimal Bedtime & Wake Time
Free sleep calculator to find your optimal bedtime and wake time based on sleep cycles. Wake up refreshed by timing your sleep with natural 90-minute ...
TDEE - Calculate Your Total Daily Energy Expenditure
Free TDEE calculator to find your daily calorie needs. Calculate Total Daily Energy Expenditure based on BMR and activity level for weight loss, maint...
Water Weight - Gallons, Liters, Pounds, Kilograms
Free water weight converter between volume and weight. Calculate how much water weighs in gallons, liters, pounds, and kilograms instantly.
Weight Loss - Set Goals & Track Progress
Free weight loss calculator to determine daily calorie deficit, timeline to reach goal weight, and weekly weight loss targets. Science-based approach.
Free Online Calculators for Every Need
Welcome to the most comprehensive collection of free online calculators. With over 161 specialized tools, we've built calculators to help you with virtually any calculation you might need — from managing your finances and tracking health metrics to solving complex mathematical problems and simplifying everyday tasks.
Each calculator is designed with precision, featuring clear interfaces, instant results, and helpful explanations. Whether you're a student, professional, or just curious, our tools make complex calculations simple and accessible.
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