Free · No sign-up · Expert reviewed

A better body starts
with better data.

Science-backed calculators, AI-powered meal plans, and personalized coaching tools. Free forever.

20+Tools available
11Free forever
8Pro AI tools
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All tools reviewed by a Certified Personal Trainer & Certified Nutrition Coach — so you can trust every number. Meet our expert →
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Body metrics

4 tools
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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
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Water intake calculator
Get your daily hydration target based on weight and activity level.
Body
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Nutrition & calories

4 tools
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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 with rate selector and macro sliders.
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
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AI coaching

4 tools
🎯
AI Goal Planner Pro
Start here. Set your goal, see your milestone journey, and get a complete AI plan — weekly objectives, behavioral targets, and your top 3 actions.
🧠
AI Coach Pro
Check in weekly, get an AI analysis of your progress — wins, issues, and your focus for the week — then chat with your coach about anything.
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AI Nutrition Assistant Pro
Meal plans, grocery lists, recipe analysis, restaurant guidance — one conversation tailored to your calorie targets, macros, and food preferences.
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AI Fitness Pro
Build workouts, get daily session guidance, estimate calorie burn, modify on the fly, and chat with your fitness coach — all in one place.
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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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AI-powered Pro tools
Upgrade to Pro for AI-powered meal plans, coaching, plateau breaking, and personalized recommendations.
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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.