Health

BMI, calories, macros, pace and the other body numbers. Free to use, no sign-up needed.

Search these tools by name or what you need to do.

Choose a tool

10 tools

BMI CalculatorBody mass index from height and weight, with the healthy range for your height. BMR CalculatorThe energy your body uses at rest, before any activity is added on top. Daily Calorie CalculatorHow much you burn in a day at your activity level, and the numbers to gain or lose. Body Fat CalculatorThe US Navy tape estimate, which needs a tape measure and nothing else. Ideal Weight CalculatorFour formulas that disagree by several kilos, which is the honest answer here. Macro CalculatorSplit a daily calorie target into grams of protein, carbohydrate and fat. Water Intake CalculatorA daily target from body weight and how long you exercised, with the caveats. Running Pace CalculatorPace and speed from a distance and a time, with the finish times that implies. Pregnancy Due Date CalculatorThe estimated date from the first day of the last period, and how far along that is. Heart Rate Zone CalculatorThe five training zones from your age and resting rate, using the Karvonen method.

Good to know

How do I use the calculator?

Fill in the labelled fields and choose the units or options shown. The result updates when you change a value. The starting numbers are an example; replace them with your own.

How do I save the result?

Use Copy result to paste it into another app, or Download text to save a copy. Check your inputs and selected units before saving.

How should I read the result?

This is an estimate based on the values and formula used by the tool. The units are shown with the inputs or result.