All Online Calculators
Browse our collection of free online calculators for finance, health, salary, and more.
Salary & Pay
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.
Overtime Calculator
Calculate overtime pay using your hourly wage and overtime multiplier. Quickly estimate your time-and-a-half, double-time earnings, and total weekly or monthly overtime compensation.
Finance
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.
Loan Calculator
Calculate monthly loan payments, total interest, and repayment schedule with extra payments and balloon payment support.
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.
Interest Rate Calculator
Calculate the interest rate on your loans, mortgages, savings, or investments using our advanced calculator.
APY Calculator
Calculate Annual Percentage Yield (APY) from APR, or calculate APY from principal and interest earned. Compare compounding frequencies.
Sales Tax Calculator
Calculate sales tax and total price instantly. Enter your item price and select a state or enter a custom tax rate to see the tax amount and final price with our free online calculator.
Inflation Calculator
Calculate the impact of inflation on the purchasing power of your money. Compare dollar values between any years from 1913 to 2026 using historical U.S. CPI data, or project future costs with custom inflation rates.
Investment
Compound Interest Calculator
Calculate how your investments grow over time with compound interest. See the power of compounding with monthly contributions, multiple frequencies, and visual growth charts.
Future Value Calculator
Estimate the future value of your investment with regular deposits and compound interest. Get year-by-year breakdowns and APY calculations with our free online tool.
CAGR Calculator
Calculate the Compound Annual Growth Rate (CAGR) of an investment, or project future value using expected growth rate.
Utility
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.
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.
Roman Numerals Converter
Convert between Roman numerals and standard numbers. Supports values from 1 to 3,999,999 with a quick reference chart.
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.
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.
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.
Random Password Generator
Generate secure, strong, random passwords instantly. Customize length and character types, exclude ambiguous characters, and see password strength and entropy with our free online password generator.
Health
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.
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.
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.
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.
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.
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.
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.
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.
Pace Calculator
Calculate your running, walking, or biking pace from time and distance. Estimate finish times, convert between pace and speed units, and compare your pace to world record benchmarks with our free online pace calculator.