Everyday Calculators

Find percentages, values and percent change with instant results.

Measure increase or decrease between two values as a percentage.

Calculate Body Mass Index and see the WHO category for your height and weight.

Estimate daily calorie needs (BMR and TDEE) from age, sex, size and activity.

Find exact age in years, months and days from any date.

Count days, weeks, months and years between any two dates.

Add or subtract days, weeks or months to any date to find the new date.

Find the elapsed time between two clock times, even across midnight.

Convert between Celsius, Fahrenheit and Kelvin instantly.

Convert length, mass, volume, area and speed across systems instantly.

Compute mean, median, mode and range of any number list.

Convert scores to percentages and letter grades, and mix weighted assignments.

Compute GPA from letter grades and credit hours, including cumulative GPA.

Find the area of circles, triangles, rectangles and more shapes.

Compute volume of boxes, cylinders, spheres, cones and tanks.

Find speed, distance or time from the other two, in any units.

Estimate your daily hydration target from weight and activity.

Estimate a healthy weight range from height using common formulas.

Estimate body fat % from measurements using the US Navy method.

Split your calorie target into protein, carbs and fat grams.

Find the ideal bedtime or wake time based on 90-minute sleep cycles.