Online Calculators

Free Online Calculators

Free online calculators for salary, loans, mortgages, health, and more. Calculate your finances and health metrics in seconds.

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Popular Calculators

Quick and easy financial calculations to help you make informed decisions.

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Amortization Calculator

Calculate your loan amortization schedule with extra payments. See how much interest you can save and pay off your loan faster.

Full amortization schedule with monthly breakdownRecurring extra payments (monthly, quarterly, yearly)One-time extra payment option
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Salary Calculator

Convert salary amounts across different pay frequencies (hourly, daily, weekly, bi-weekly, semi-monthly, monthly, quarterly, annual) with holiday and vacation day adjustments.

8 pay frequency conversions (hourly to annual)Unadjusted and holiday/vacation adjusted resultsCustom holidays and vacation days
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PTO Calculator

Calculate how much paid time off you will accrue over a time period based on your accrual rate, frequency, and starting balance.

Date-based PTO accrual calculationMultiple accrual frequencies (daily, weekly, bi-weekly, semi-monthly, monthly)Starting balance support
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Overtime Calculator

Calculate overtime pay using your hourly wage and overtime multiplier.

Overtime pay calculationMultiple multiplier supportWeekly/monthly totals
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Pregnancy & Due Date Calculator

Calculate your due date, see how many weeks pregnant you are, and estimate birth probability by week.

Calculate due date from LMP or ultrasoundAdjustable cycle length (20–45 days)Trimester progress visualization
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Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio (WHR) to understand your body shape and associated health risks.

Body shape classification (Pear, Avocado, Apple)Visual risk gaugeImperial and metric support
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Age Calculator

Calculate your exact age in years, months, weeks, and days. Find your zodiac sign, day of the week you were born, and next birthday countdown.

Exact age in years, months, and daysTotal months, weeks, days, hours, minutes, secondsDay of week born
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Loan Calculator

Calculate monthly loan payments, total interest, and repayment schedule with extra payments and balloon payment support.

Monthly payment calculation with KaTeX formulaExtra payments (monthly, quarterly, half-yearly, yearly)One-time extra payment option
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Mortgage Calculator

Calculate your monthly mortgage payment including principal, interest, property taxes, insurance, PMI, and HOA fees. View amortization schedule and see how extra payments can save you money.

Monthly P&I with property tax, insurance, PMI, HOA, and other costsDown payment percentage displayAmortization schedule by year
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Compound Interest Calculator

Calculate how your investments grow over time with compound interest.

Investment growth projectionMonthly contribution supportMultiple compounding frequencies
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Interest Rate Calculator

Calculate the interest rate on your loans, mortgages, savings, or investments using our advanced calculator.

Loan interest rate calculationSavings/Investment rate calculationNominal vs effective rate comparison
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Future Value Calculator

Estimate the future value of your investment with regular deposits and compound interest over time.

Future value with periodic contributionsMultiple compounding frequenciesYearly breakdown table
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Steps to Calories Calculator

Calculate how many calories you burn from walking or running steps, based on height, weight, and pace.

MET-based calorie calculation8 walking/running speed optionsImperial and metric unit support
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BMI Calculator

Calculate your Body Mass Index (BMI) to determine if your weight is in a healthy range for your height.

Metric and imperial unit supportBMI classification (WHO)Healthy weight range
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BMR Calculator

Calculate your Basal Metabolic Rate (BMR) and daily calorie requirements based on your activity level.

Multiple BMR equations (Mifflin-St Jeor, Harris-Benedict)Daily calorie needs by activity levelMetric and imperial unit support
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Miles to Steps Calculator

Convert miles to steps based on your height, gender, and walking/running pace.

Height and gender adjusted step countMultiple pace options from walking to sprintingMiles to steps conversion chart
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kJ to Calories Converter

Convert between kilojoules (kJ) and food calories (kcal) quickly and accurately.

Bidirectional kJ ↔ calories conversionFood calorie presetsConversion reference chart
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APY Calculator

Calculate Annual Percentage Yield (APY) from APR, or calculate APY from principal and interest earned. Compare compounding frequencies.

APR to APY conversionInterest earned to APY calculationComparison across compounding frequencies
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CAGR Calculator

Calculate the Compound Annual Growth Rate (CAGR) of an investment, or project future value using expected growth rate.

Standard CAGR from present & future valueDate-based CAGR calculationFuture value projection from CAGR
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Generation Calculator

Find out which generation you belong to based on your birth year. Learn about the characteristics, values, and cultural impact of each generation.

Identify your generational group from birth yearAll 7 generations from WWII to Gen AlphaCharacteristics, values, and cultural impact
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Roman Numerals Converter

Convert between Roman numerals and standard numbers. Supports values from 1 to 3,999,999 with a quick reference chart.

Bidirectional conversion (number ↔ Roman)Supports values up to 3,999,999Latin symbol names

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Why Use Our Calculators?

Fast & Instant

Get results in seconds. No waiting, no loading screens.

100% Free

All calculators are completely free to use. No hidden fees.

Easy to Use

Simple interface designed for everyone. No math skills needed.