Health

Health & Fitness Calculators

Track and improve your wellbeing with our free BMI calculator, calorie calculator, and TDEE calculator. Whether you want to find your ideal weight, estimate your body fat percentage, or plan your nutrition with a macro calculator, all tools support both metric (kg/cm) and imperial (lbs/inches) units. Our BMR calculator uses the Mifflin-St Jeor equation — the same formula used by registered dietitians. Results are for general guidance; always consult a healthcare professional for medical advice. Last updated:

Fitness

BMI Calculator
Metric + imperial BMI.
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Calorie Calculator
Daily calorie estimate.
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Body Fat Calculator
Body fat estimate.
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BMR Calculator
Basal metabolic rate.
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Ideal Weight Calculator
Healthy range estimate.
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Pace Calculator
Pace & finish time.
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Army Body Fat Calculator
US Army body fat % formula.
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Lean Body Mass Calculator
Lean body mass estimate.
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Healthy Weight Calculator
Recommended healthy weight.
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Calories Burned Calculator
Calories burned by activity.
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One Rep Max Calculator
Estimate 1RM strength.
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Target Heart Rate Calculator
Exercise heart rate zones.
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VO2 Max Estimator
Cardio fitness level (non-lab).
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Heart Rate Recovery Calculator
Post-exercise recovery score.
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Daily Step Calorie Estimator
Steps to calories burned.
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Body Composition & Shape

Waist-to-Hip Ratio Calculator
Health risk from waist/hip.
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Waist-to-Height Ratio Calculator
Better health risk indicator.
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Visceral Fat Estimator
Belly fat level estimate.
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Body Type Calculator
Somatotype (ectomorph, etc.).
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Pregnancy

Pregnancy Calculator
Pregnancy timeline & milestones.
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Pregnancy Weight Gain Calculator
Recommended pregnancy weight gain.
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Pregnancy Conception Calculator
Estimated conception date.
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Due Date Calculator
Expected delivery date.
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Ovulation Calculator
Fertile window & ovulation.
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Conception Calculator
Conception date predictor.
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Period Calculator
Menstrual cycle tracker.
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Nutrition & Lifestyle

Macro Calculator
Macronutrient ratios & grams.
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Carbohydrate Calculator
Daily carb needs.
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Protein Calculator
Protein intake recommendation.
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Fat Intake Calculator
Healthy fat consumption.
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TDEE Calculator
Total Daily Energy Expenditure.
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Hydration Calculator
Daily water intake needs.
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Intermittent Fasting Timer
Fasting window planner.
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Sleep Debt Calculator
Sleep need & deficit.
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Other Health Tools

GFR Calculator
Glomerular Filtration Rate (kidney).
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Body Surface Area Calculator
BSA (Du Bois / Mosteller).
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BAC Calculator
Blood Alcohol Concentration estimate.
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Osteoporosis Risk Calculator
Basic bone health risk.
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Related Health & Fitness Guides

BMI Calculator Explained (2026)
BMR vs TDEE: What's the Difference?
Calorie Deficit for Weight Loss
How to Measure Body Fat Without a Scale
Macro Splits for Cutting & Bulking
Common BMI Mistakes to Avoid
Pregnancy Week-by-Week Guide
Ovulation & Fertile Window Explained

Health Calculator FAQs

Which health calculator should I use first?

Start with BMI for a quick weight-to-height screen, then use the BMR and TDEE calculators to find your daily calorie needs. For fat-loss or muscle-gain goals, pair TDEE with the calorie and macro calculators.

Is BMI an accurate measure of health?

BMI is a useful screening tool but it does not distinguish muscle from fat. Athletes and very muscular people can score "overweight" while being healthy. Pair BMI with waist measurement and body-fat percentage for a fuller picture.

What is the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the calories your body burns at complete rest. TDEE (Total Daily Energy Expenditure) is BMR plus the calories burned through daily activity and exercise — it is the number you base calorie targets on.

How many calories should I eat to lose weight?

A safe deficit is about 300–500 calories below your TDEE, which loses roughly 0.5–1 lb (0.25–0.5 kg) per week. Use the calorie calculator to set your maintenance number, then subtract your deficit.

Are these health calculators free and private?

Yes. Every calculator on this page is 100% free, needs no sign-up, and runs in your browser — your height, weight, and results are never sent to a server or stored.