BMI Calculator
Check your Body Mass Index and healthy weight range.
OpenCalorie Calculator
Daily calories to maintain, lose or gain weight.
OpenBody Fat Calculator
Estimate body fat percentage with the US Navy method.
OpenBMR Calculator
Basal metabolic rate — calories burned at rest.
OpenIdeal Weight Calculator
Your ideal body weight from height and gender.
OpenPace Calculator
Running pace and speed from distance and time.
OpenPregnancy Calculator
Track pregnancy progress and key dates from your last period.
OpenConception Calculator
Estimate the likely conception date from a due date.
OpenDue Date Calculator
Estimate your baby's due date (Naegele's rule).
OpenFitness & Health Calculators — free and easy to use
BMI, calories, body fat and pregnancy tools to track your health. Every tool here runs instantly in your browser, needs no sign-up, and works on any phone or computer. Pick a tool above to get started, enter your values, and read a clear result with a full breakdown.
All results are estimates to help you plan — for money, tax and official matters, confirm the figures with the relevant authority.