AIFitLog Tools
Free Strength
Training Calculators
Practical calculators for serious training — free, no signup required.
Everything runs in your browser.
1RM Calculator
Estimate your one rep max from any set. Includes a full percentage-based training load table.
FFMI Calculator
Calculate your Fat-Free Mass Index from height, weight, and body fat. An objective measure of muscle development.
TDEE Calculator
Calculate your Total Daily Energy Expenditure from height, weight, age, and activity level. Find your target calories for cutting, bulking, or maintaining.
Training Frequency Checker
Pick your goal, experience level, and available days to get a recommended weekly training frequency and split.
Don't just calculate —
track and improve
AIFitLog automatically tracks your 1RM history and body composition.
AI reviews your weekly progress and suggests what to focus on next.
Android Coming Soon
iOS Coming Soon
Available in English and Japanese