Free · No sign-up · Expert reviewed

A better body starts
with better data.

Science-backed calculators for BMI, TDEE, macros, due dates, and more. Free forever.

10Free tools
100%No sign-up
ExpertReviewed formulas
💪
Formulas reviewed by Daniel J. D'Alessandro, CPT & Certified Nutrition Coach — so you can trust every number.
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Body metrics

3 tools
⚖️
BMI calculator
Calculate your body mass index and healthy weight range for your height.
Most popular
🎯
Ideal weight calculator
Find your ideal weight range using four evidence-based formulas.
Body
📐
Body fat % estimator
Estimate body fat percentage using the Navy Method with simple measurements.
Body
🔥

Nutrition & calories

4 tools
🔥
TDEE calculator
Find your total daily energy expenditure based on age, size, and activity level.
Popular
🥩
Macro calculator
Get your daily protein, carb, and fat targets based on your goal.
Nutrition
❤️
BMR calculator
Calculate your basal metabolic rate — the calories your body burns at complete rest.
Nutrition
📉
Calorie deficit calculator
Calculate your deficit and estimated time to reach your goal weight.
Nutrition
🤰

Pregnancy

2 tools
🤰
Due date calculator
Calculate your estimated due date and trimester milestones from LMP or conception date.
Popular
📊
Pregnancy weight gain
Get recommended weight gain by trimester based on your pre-pregnancy BMI.
Pregnancy
💧

Fitness & hydration

1 tool
💧
Water intake calculator
Get your daily hydration target based on weight and activity level.
Fitness
✨

Why BetterBodySuite?

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Science-backed formulas
Every calculator uses established medical and nutritional formulas — Mifflin-St Jeor, Navy Method, Hamwi, and more.
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No data collected
All calculations happen in your browser. We never store, sell, or share any of your health information.
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Instant results
No loading screens, no sign-up, no email required. Enter your numbers and get your answer immediately.
💪
Expert reviewed
All formulas reviewed by Daniel J. D'Alessandro, CPT & Certified Nutrition Coach — so you can trust every number.

⚕️ Medical Disclaimer: BetterBodySuite provides general wellness information only. These tools are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making health decisions. Results are estimates based on population-level formulas and may not reflect individual variation.