Tools for the work
Practical tools, built for honest tracking.
Clear calculations, careful context and no uploads. Use the same conditions each time and follow the trend.
Body composition
Body Fat Calculator
Estimate body fat with the Jackson and Pollock 3 site or 7 site skinfold method. See every measurement point and keep the calculation private in your browser.
- 3 site and 7 site
- Male and female equations
- Visual measurement guide
Energy baseline
BMR Calculator
Estimate resting daily energy needs with the Mifflin St Jeor equation. Use it as a baseline before activity and training are added.
- Mifflin St Jeor
- Metric inputs
- Resting estimate
Daily energy
TDEE Calculator
Combine a resting energy estimate with a physical activity level to create a practical starting estimate for total daily energy expenditure.
- BMR plus activity
- FAO PAL method
- Daily and weekly view
Relative muscularity
FFMI Calculator
Relate estimated fat free mass to height. See raw FFMI, the height adjusted value and the body composition figures behind the result.
- Raw and adjusted FFMI
- Lean mass breakdown
- No steroid claims