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Currency & unitsUSD · Imperial

Using USD and Imperial. You can change either choice.

Currency changes the unit of your amounts, not their value. No exchange rate or country-specific tax, benefit, or lending rule is applied. Money results and loan schedules retain the calculators’ two-decimal precision; this does not apply local cash-rounding rules.

Measurement changes convert valid existing quantities. Incomplete entries stay as typed; finish them using the units shown. Other units stay as labeled. Enter numbers as 1,234.56; a decimal comma is not supported.

Initial suggestions use only your browser’s language region. Choices are saved on this browser; no location lookup is used.

Health & Fitness Calculators

Adult body measurements and clearly explained energy estimates. Choose a tool below for instant results, formulas, and examples.

Body Fat CalculatorEstimate adult body fat from height and body circumferences using legacy circumference equations. Show estimated fat and fat-free mass with metric or imperial inputs.Protein CalculatorConvert an adult protein reference range or custom grams-per-kilogram factors into daily and per-meal grams using metric or imperial body weight.Calorie Deficit CalculatorCalculate daily and weekly calorie gaps from maintenance energy and a chosen reduction or intake. Compare selected deficit days with maintenance days.BMI CalculatorCalculate adult BMI with metric or imperial measurements, see the CDC category, and understand the height-based reference weight interval.BMR CalculatorEstimate adult resting calorie needs with the Mifflin–St Jeor equation. Use pounds/inches or kilograms/centimeters and inspect the calculation.TDEE CalculatorEstimate total daily energy expenditure using resting calorie needs and an explicit activity multiplier. Compare activity scenarios in kcal and kJ.