BMI Calculator
Body Mass Index, ideal weight range and waist-to-height ratio with personalized tips.
Health
6 toolsFree · private · no sign-up
Health & fitness calculators
Understand your body with quick, science-based calculators. Check your BMI and healthy weight range, set protein, carb and fat targets, and discover your lifetime heartbeats, steps and hours asleep.
Macro Calculator
Protein, carb and fat targets for cutting, bulking or maintenance.
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Lifetime Heartbeats
How many times your heart has beaten since birth, with live counter and heart facts.
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Lifetime Steps
Total steps and distance walked in your lifetime, compared to famous journeys.
Health
Sleep Calculator
How much of your life you've spent asleep, plus sleep facts and recovery insights.
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Breath Counter
Estimate the breaths you've taken in your lifetime and the air volume you've moved.
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About our health tools
The BMI calculator shows your Body Mass Index alongside waist-to-height ratio and an ideal weight range, while the macro calculator estimates your daily energy needs and splits them into macronutrients for cutting, maintaining or bulking.
These tools are for general information and are not medical advice. Talk to a qualified professional before making significant changes to your diet or exercise.
All health tools
- BMI Calculator: Body Mass Index, ideal weight range and waist-to-height ratio with personalized tips.
- Macro Calculator: Protein, carb and fat targets for cutting, bulking or maintenance.
- Lifetime Heartbeats: How many times your heart has beaten since birth, with live counter and heart facts.
- Lifetime Steps: Total steps and distance walked in your lifetime, compared to famous journeys.
- Sleep Calculator: How much of your life you've spent asleep, plus sleep facts and recovery insights.
- Breath Counter: Estimate the breaths you've taken in your lifetime and the air volume you've moved.
Frequently asked questions
Is BMI a good measure of health?
BMI is a quick screening number based on height and weight. It does not distinguish muscle from fat, so the calculator also shows waist-to-height ratio, which better reflects abdominal fat.
How are macros calculated?
The macro calculator estimates your basal metabolic rate with the Mifflin-St Jeor equation, multiplies it by your activity level, adjusts for your goal and then splits calories into protein, carbohydrate and fat.
Is my health data private?
Yes. Height, weight, age and other inputs are processed on your device and never sent to a server.
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