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Online Calculators

All Online Calculators

Browse our collection of free online calculators for finance, health, salary, and more.

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Finance

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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 with our free online tool.

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

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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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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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Wind Chill Calculator

Calculate wind chill temperature based on air temperature and wind speed. Understand frostbite risk, danger levels, and cold weather safety tips using the National Weather Service formula.

Wind chill calculation using the NWS formulaImperial (°F, mph) and Metric (°C, km/h) supportFrostbite risk levels and estimated exposure times
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Heat Index Calculator

Calculate the heat index (feels like temperature) based on air temperature and relative humidity or dew point. Understand heat danger levels, health risks, and safety tips using the National Weather Service Rothfusz regression formula.

Heat index calculation using NWS Rothfusz regression formulaRelative humidity or dew point temperature input modesImperial (°F) and Metric (°C) unit support
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Dew Point Calculator

Calculate dew point temperature from air temperature and relative humidity using the Magnus formula. Understand humidity levels, comfort ratings, and absolute humidity with our free online dew point calculator.

Dew point calculation using the Magnus formulaRelative humidity or dew point input modesImperial (°F) and Metric (°C) unit support
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Health

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Pregnancy & Due Date Calculator

Calculate your due date from your last menstrual period or ultrasound date. See how many weeks pregnant you are and estimate birth probability by week with our free online pregnancy calculator.

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. Our free online calculator helps you determine if your fat distribution is within a healthy range.

Body shape classification (Pear, Avocado, Apple)Visual risk gaugeImperial and metric support
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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. Use our free online MET-based calculator for accurate results.

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. Get instant results with our free online BMI calculator that supports both metric and imperial units.

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. Use Mifflin-St Jeor or Harris-Benedict formulas to plan your diet and weight goals.

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 or running pace. Get accurate step estimates for any distance to help you meet your daily fitness goals.

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. Perfect for reading nutrition labels and tracking your daily energy intake.

Bidirectional kJ ↔ calories conversionFood calorie presetsConversion reference chart
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Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method and BMI method. See your body fat category, lean body mass, ideal body fat, and how much fat to lose.

U.S. Navy method body fat calculationBMI method body fat estimationACE body fat categories