Know Your Body. Reach Your Goals.
Eight science-backed health calculators — BMI, TDEE, calories, BMR, body fat, macros, calorie deficit and ideal weight. Get accurate results in seconds, no registration required.
Every calculator you need
Pick a tool and get your personalised result in seconds. Each calculator includes a full explanation, reference table and FAQ.
BMI Calculator
Calculate your Body Mass Index and find out whether you are underweight, healthy, overweight or obese according to WHO standards.
TDEE Calculator
Estimate how many calories your body burns per day across all activity levels. Instantly compare sedentary, light, moderate, active and athlete calorie expenditure in one overview.
Calorie Calculator
Find out exactly how many calories you should eat per day to lose weight, maintain or gain — based on your age, gender, weight and activity level.
BMR Calculator
Calculate your Basal Metabolic Rate — the number of calories your body burns at complete rest. The foundation of every calorie calculation.
Body Fat Calculator
Estimate your body fat percentage based on BMI, age and gender. Understand what your result means for your health and fitness.
Macro Calculator
Calculate your ideal daily intake of protein, carbohydrates and fats based on your goal: weight loss, maintenance or muscle gain.
Calorie Deficit Calculator
Find the right calorie deficit to lose weight safely and sustainably — without crash diets or slowing your metabolism.
Ideal Weight Calculator
Discover your ideal body weight range based on your height and gender, calculated using multiple validated formulas.
How it works
Three steps to a clear picture of your health.
Choose your calculator
Pick the tool that matches your question — whether that is your weight, your calorie needs, your body fat or your macros.
Enter your details
Fill in your weight, height, age and activity level. All calculators support both metric (kg/cm) and imperial (lbs/ft).
Get your result
Receive your personalised result instantly — with a full explanation of what it means and exactly what to do next.
Why BodyStatsHub?
Scientifically accurate
Every calculator uses peer-reviewed, internationally recognised formulas — the same ones used by doctors and dietitians.
Instant results
No loading screens, no waiting. Results appear as you type — tested across thousands of inputs.
Mobile-first design
Designed for every screen size. Works perfectly on your phone, tablet and desktop — no app download needed.
Zero barriers
No account, no subscription. Just the tools you need, completely free.
Metric & imperial
Every calculator supports both kg/cm and lbs/ft. Switch with one tap at any time.
Learn as you go
Every result comes with a full explanation, reference table and FAQ — so you understand the numbers, not just see them.
What is BodyStatsHub?
BodyStatsHub is a free online platform that brings multiple essential health calculators together in one place. Whether you want to lose weight, build muscle, improve your fitness or simply understand your body better — our tools give you the numbers you need, instantly and without any barriers.
Every formula we use is based on established scientific research: the Mifflin–St Jeor equation for BMR and calorie calculations, WHO standards for BMI classification, and validated estimation methods for body fat percentage and ideal weight. We do not just show you a number — we explain what it means and what to do with it.
Why use a health calculator?
Understanding your body's numbers is the starting point for any meaningful health or fitness goal. Without knowing your daily calorie needs, for example, any diet is little more than guesswork. Without knowing your BMI or body fat percentage, it is hard to set a realistic target weight. Our calculators remove the guesswork:
- Use the BMI Calculator as a first check on where your weight stands relative to health guidelines.
- Use the Calorie Calculator to find your personalised daily calorie target for your specific goal.
- Use the BMR Calculator to understand your baseline metabolism before factoring in activity.
- Use the Body Fat Calculator to look beyond weight and understand your actual body composition.
- Use the Macro Calculator to split your calorie target into the right amounts of protein, carbs and fats.
- Use the Calorie Deficit Calculator to find a safe, sustainable rate of weight loss.
- Use the Ideal Weight Calculator to set a realistic, science-based target weight.
How accurate are the results?
All results are estimates based on population averages — no calculator can measure your exact physiology. That said, the formulas we use (Mifflin–St Jeor, WHO BMI classification, Harris-Benedict) are the most accurate widely-available options and are used in clinical and research settings worldwide. For most healthy adults, results are accurate within 5–10%. Always treat calculator outputs as a starting point and adjust based on real-world feedback over 2–3 weeks.
Ready to know your numbers?
Start with the BMI Calculator — your result in under 10 seconds.
Calculate my BMI →Frequently asked questions
BodyStatsHub provides tools for informational purposes only. Results are estimates and do not constitute medical advice. Always consult a qualified healthcare professional for health decisions.