Free Online Calculators
Fast, accurate tools for finance, health, dates, business, and more.
234+ calculators available
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Most Popular Calculators
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Date Difference
Find the exact number of days, weeks, months, and years between two dates.
Retirement
Estimate how much you'll have saved by retirement based on your current savings, monthly contributions, expected return rate, and target retirement age.
Paycheck
Estimate your net take-home pay after federal taxes, Social Security, and Medicare.
Anniversary
Find out exactly how long you've been together, or calculate when your next anniversary is.
IF Calculator
Calculate your intermittent fasting schedule.
Mortgage
Calculate your monthly mortgage payment including principal, interest, property tax, and insurance.
GPA
Calculate your GPA for the semester or cumulative across multiple terms.
Calorie / TDEE
Calculate your daily calorie needs based on your age, height, weight, and activity level.
Profit
Calculate gross profit, profit margin, and markup from revenue and costs.
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Weight Loss
Calculate how long it will take to reach your goal weight based on your daily calorie deficit.
Ideal Weight
Find your ideal weight range based on height and sex using multiple established formulas — BMI range, Devine, and Hamwi methods.
Walking Calories
Calculate calories burned walking based on your weight, duration, and pace.
Running Calories
Calculate calories burned running based on weight, duration, and speed.
Steps to Calories
Convert steps to calories burned.
Steps to Miles
Convert steps to miles and kilometres.
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Instant Results
Calculations update in real-time as you type
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Works perfectly on any device, any screen size
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No signup. No tracking. Just answers.