Professional calculators trusted by personal trainers and nutritionists. No sign-up, no limits — built with validated, up-to-date formulas. Perfect for clients, athletes, and fitness professionals.
The Trainer Connect app calculates BMI, BMR, 1RM, and macros, saves each student's history, and automatically generates progress charts. Start for free.
Open Trainer ConnectReliable, up-to-date tools built for the fitness market — ready to use right out of the box.
Mifflin-St Jeor (BMR), Epley and Brzycki (1RM), WHO classification (BMI) — all globally recognized standards.
The calculations run in your browser. None of your data is sent or stored on a server.
Want to save and track progress? The Trainer Connect app has all these calculators built in, with history.
Units in kg, cm, and calories. Clear language, no unnecessary technical jargon.