FitCalc is a collection of free, science-backed fitness calculators designed to help you make informed decisions about your training and nutrition.
Our Tools
- TDEE Calculator — Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation.
- One-Rep Max Calculator — Estimate your 1RM using three proven formulas with training percentage charts.
- Macro Calculator — Get daily protein, carbs, and fat targets based on your goals and diet style.
Our Approach
Every calculator on FitCalc uses peer-reviewed scientific formulas. We keep things simple, fast, and accurate — no sign-ups, no paywalls, no bloat.
Disclaimer
FitCalc is for informational and educational purposes only. The results provided by our calculators are estimates based on scientific formulas and should not be considered medical advice. Always consult with a qualified healthcare professional or certified fitness trainer before starting any new diet or exercise program.