Calculators
Seven tools that share one model of how your body uses energy. Start with the TDEE calculator: the calorie, macro and MET tools fill in from your last result on this device, so you only type your numbers once.
Which one do I need?
Planning a diet or a training block? Begin with the TDEE calculator for your maintenance number. Have a goal weight and a deadline? The calorie calculator converts them into a daily figure and flags an unrealistic pace. Then the macro calculator splits that figure into grams.
Curious about body composition? The body fat calculator compares a tape-measure formula, skinfolds and a BMI estimate. If you know the figure, enter it in the TDEE tool: two lean-mass equations then join its average.
Training? The MET calculator gives calories for a single session, the one-rep max calculator turns a hard set into training weights, and the workout planner lays out a week around your goal and schedule.
The tools talk to each other: once you have run the TDEE calculator on this device, the calorie and macro tools open with your numbers already filled in. Nothing leaves your browser. For the maths, see how it works.