TrainCalc
Free, science-based fitness calculators for BMI, TDEE, macros, and body fat—plan nutrition and training smarter.

TrainCalc Introduction
TrainCalc is a free, science-based platform that turns complex fitness math into clear, practical answers. Instantly calculate BMI, BMR, TDEE, body-fat %, macros, protein intake, water needs, heart-rate zones, and more—no ads, no clutter.
TrainCalc Core Features
- Accurate calculators for BMI, TDEE, macros, body-fat %, protein & water intake
- Science-backed formulas with plain-language explanations
- Clean, fast UI that works great on mobile and desktop
- Actionable outputs for diet planning and workout targets
- Guides & resources that teach the “why” behind the numbers
TrainCalc Usage
- Open a calculator (e.g., TDEE).
- Enter age, sex, height, weight, and activity level.
- Get calories and macro targets instantly.
- Read the short guide to apply results to real meals & training.
Great for beginners, athletes, and coaches who want quick, trustworthy numbers.
TrainCalc Price
- Free — all calculators and guides are available without ads or paywalls.
TrainCalc FAQs
Is TrainCalc accurate?
Yes. We use validated formulas (e.g., Mifflin-St Jeor for TDEE, standard BMI/Body-fat equations) and explain how to interpret results.
Do I need an account?
No—everything is free to use with no login.
Is there an app?
The site is fully mobile-friendly; a PWA/app is on the roadmap.
TrainCalc Contact
- Website: https://traincalc.com
- Email: [email protected]
- Twitter/X: https://x.com/TrainCalc
- LinkedIn: https://www.linkedin.com/in/traincalc/
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