12 free & Pro tools · No sign-up · Expert reviewed

A better body starts
with better data.

Science-backed calculators and AI coaching tools — built to help you set goals, stay consistent, and actually reach them.

12Tools available

8Free calculators

4AI coaching tools

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Body metrics

4 tools

Calculate your body mass index and healthy weight range for your height.

Ideal weight calculator

Find your ideal weight range using four evidence-based formulas.

Body fat % estimator

Estimate body fat percentage using the Navy Method with simple measurements.

Water intake calculator

Get your daily hydration target based on weight and activity level.

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Nutrition

4 tools

TDEE calculator

Find your total daily energy expenditure based on age, size, and activity level.

Macro calculator

Get your daily protein, carb, and fat targets with rate selector and macro sliders.

Calculate your basal metabolic rate — the calories your body burns at complete rest.

Calorie deficit calculator

Calculate your deficit and estimated time to reach your goal weight.

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AI coaching

4 tools ✦ Includes Pro features

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.

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.

AI Nutrition Assistant Pro

Meal plans, grocery lists, recipe analysis, restaurant guidance — one conversation tailored to your calorie targets, macros, and food preferences. Pro only.

Build workouts, get daily session guidance, estimate calorie burn, modify on the fly, and chat with your fitness coach. Pro only.

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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.