This site provides simple, fast fitness calculators designed for everyday training decisions:
- 1RM: estimate one-rep max from weight × reps using common formulas.
- Weight Loss: estimate timeline from current/target weight and a daily calorie deficit.
- Calories: BMR/TDEE estimate with macro breakdown.
Local-first
Inputs and history are stored in your browser only (localStorage). There is no account system.
Accuracy
All calculators are estimates. Use as guidance, not medical advice.