Free online calculators
22 quick, accurate calculators for money, health, dates, school and unit conversions. Every page shows the formula and a worked example, and nothing you type leaves your browser.
Money
- Mortgage CalculatorSee what a home really costs per month, not just the loan payment: property tax, insurance and HOA dues are included.
- Loan CalculatorFind the monthly payment on any fixed-rate loan: car, personal, student or business.
- Compound Interest CalculatorWatch a starting balance and regular monthly deposits grow over time.
- Savings Goal CalculatorPick a goal and a deadline; see what you need to put away each month.
- Salary to Hourly CalculatorTurn a yearly salary into an hourly rate, or an hourly wage into a yearly figure, before taxes.
Health & fitness
- BMI CalculatorFind your body mass index and the weight range considered healthy for your height.
- Calorie CalculatorEstimate how many calories your body uses each day and what that means for losing, keeping or gaining weight.
- Running Pace CalculatorTurn a distance and a time into pace per mile, pace per kilometer and speed.
Dates & time
- Age CalculatorGet an exact age from a birth date, as of today or any other date.
- Days Between Dates CalculatorCount days, weeks and weekdays between any two dates.
- Add Days to a DateFind the date that is a given number of days before or after another date.
- Hours CalculatorWork out a shift's length in hours and minutes and as decimal hours for a timesheet.
School
Everyday math
- Percentage CalculatorWork out any everyday percentage: a share of a number, what percent one number is of another, or how much something went up or down.
- Percent Difference CalculatorCompare two values when neither one is the "starting" value, such as two measurements, two prices from different stores, or two lab results.
- Tip CalculatorWork out the tip and each person's share in a couple of seconds.
- Discount CalculatorFind the real price of a sale item, including "extra 10% off" deals and sales tax.
- Sales Tax CalculatorAdd tax to a price, or strip it out of a total to find the pre-tax amount.