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Calculators

Free online calculators for money, school, health, dates and unit conversions. Clear results with every step explained.

Finance Education Health Date & Time Converters

Finance Calculators

Discount calculatorSee the final price after a sale, extra discounts and a coupon.Percentage calculatorQuick answers: a percent of a number, what percent one number is of another, and percent change.Tip calculatorWork out the tip and split the bill between friends.Sales tax calculatorAdd sales tax to a price, take it out of a total, or find the tax rate from your receipt.Mortgage calculatorEstimate your monthly house payment with taxes, insurance, PMI and HOA.Auto loan calculatorWork out your monthly car payment with trade-in, sales tax and fees.Compound interest calculatorSee how savings grow with compound interest and regular contributions, year by year.Hourly to salary calculatorConvert an hourly wage to a yearly salary and back.

Education Calculators

GPA calculatorCalculate your weighted and unweighted GPA on the 4.0 scale, and your new cumulative GPA.Grade calculatorWork out your class grade from weighted assignments, and the score you need on the final exam.

Health Calculators

BMI calculatorWork out your body mass index from height and weight, in US or metric units, with the healthy weight range for your height.Calorie calculatorEstimate how many calories you burn each day and how many you need to maintain, lose or gain weight.Body fat calculatorEstimate your body fat percentage with a tape measure, using the US Navy method.Ideal weight calculatorSee the healthy weight range for your height and what four classic ideal weight formulas estimate.

Date & Time Calculators

Age calculatorFind an exact age in years, months and days, plus total days, the day you were born and your next birthday.Date difference calculatorCount the days, weeks and business days between two dates, or add and subtract days from a date.

Converters

Unit converterConvert length, weight, temperature, volume, area and speed between US and metric units on one page.Time zone converterConvert a time between US and world time zones.

About our calculators

Calculators for everyday questions in the US: sale prices, tips, loans, grades, dates and units. Each one updates as you type and shows how the answer is reached.