Free tools
Index · 05 instruments
Fitness
Calculators
Free, instant, and no signup required. Every calculator uses the same evidence-based formulas the Athli Track app runs on — Mifflin-St Jeor for energy, bodyweight-anchored macros, Epley and Brzycki for strength. Get a real answer, then track it for real in the app.
Calorie Calculator
Your BMR, TDEE and daily target with a full macro breakdown.Mifflin-St Jeor
02Macro Calculator
Turn a calorie goal into protein, carb and fat grams.g/kg-anchored split
03BMI Calculator
Body mass index with the WHO category and a healthy range.WHO classification
04One-Rep-Max
Estimate your 1RM and read off every training percentage.Epley · Brzycki
05Protein Intake
How many grams of protein per day for your goal and weight.1.6–2.2 g/kg
Athli Track
Numbers are nothing
without a log
A calculator gives you a target once. Athli Track keeps it honest — log workouts, meals and bodyweight, and watch your real TDEE, macros and strength move week to week. Free to start on iPhone and Android.