HealthCalc Platform
BMI, body fat, TDEE, and 50+ more health calculators
Free tools for calorie planning, body composition, GLP-1 tracking, Army fitness testing, and day-to-day health decisions.
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Most popular calculators
Quickly jump into the tools users rely on most.
Browse all 56 calculators across 10 categories including body composition, performance, nutrition, and pregnancy.
Connected tools
Guided Health Workflows
Follow step-by-step workflows that connect multiple calculators. Enter your details once and get a complete health picture.
Weight Loss Journey
Assess your body, calculate energy needs, and build a deficit plan.
Body Composition Deep Dive
Understand your body shape, fat-free mass, and ideal weight targets.
Fitness Baseline
Establish your cardio fitness metrics: heart rate and VO2 max.
Nutrition Planning
Calculate calories, set macro splits, and plan hydration.
Our promise
Why HealthCalc?
Most health calculator sites hide the answer behind sign-up walls, pop-ups, and upsells. Here is what we do differently.
Peer-Reviewed Formulas
Every calculator uses published equations like Mifflin-St Jeor for BMR, the Navy method for body fat, and WHO references for BMI.
Privacy First
No account required. No data leaves your browser. Your measurements stay on your device, not on our servers.
Completely Free
No paywalls, no premium tiers, no "unlock full results" gates. Ads keep the tools free — your numbers never sit behind one.
Open Source Formulas
The calculation methodology behind every tool is transparent. You can see exactly which formula produced your result.
Go deeper
Guides & Research
Evidence-based explainers to help you understand what the numbers mean.
Understanding Body Fat Percentage: Ranges, Risks, and How to Measure
What the numbers actually mean for your health, how different ranges affect disease risk, and which measurement methods are worth your time.
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Energy ExpenditureTDEE Explained: How Many Calories Do You Really Need?
Break down each component of your daily energy expenditure and learn how it shapes your nutrition strategy.
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Weight Management5 Myths About Calorie Deficits Debunked
Why weight loss is not always linear, why starvation mode is overstated, and how to set expectations that actually hold up.
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Ready to run your numbers?
It takes less than a minute. No sign-up, no data stored, no paywall — just answers.