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Body and Weight 4
Open Body and WeightNutrition 5
Open NutritionFitness 2
Open FitnessPregnancy and Baby 3
Open Pregnancy and BabySleep and Wellness 1
Open Sleep and WellnessAbout Health Calculators
Health and fitness calculators based on published clinical formulas: BMI with WHO categories, daily calorie needs using the Mifflin-St Jeor equation, body fat, ideal weight, water intake, pregnancy due dates and macros. Each page explains the method and its limits in plain words. Your measurements stay in your browser. These tools give estimates to help you plan and are not a substitute for advice from a doctor.
Who uses these
Questions about health and fitness
Are these health and fitness tools really free?
Yes. Every tool on FreeToolr is free to use, with no account needed and no limit on how often you use it. A free account is optional and only saves your favourites and results. Ads in the page pay for the site; they never sit inside a tool.
Do my files or numbers leave my device?
No. These tools run inside your browser, so your files and the numbers you type stay on your phone or laptop. Nothing is uploaded or stored.
How often do you add new health and fitness tools?
New tools open every week. We plan 60 or more in this category, and each one is checked by a person before it goes live. Tap the heart on any tool marked Soon to keep it in your favourites.