Tools
Each tool runs the same math the Deficit app uses internally, anchored on lean body mass rather than total weight.
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Lean Body Mass Calculator
Calculate LBM with the Cunningham equation, then chain it forward to a protein target, body-fat-aware deficit, and an 8-week cycle plan. The most complete tool on the site.
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TDEE Calculator
Find your maintenance calories with the same Cunningham + PAL + TEF math. Useful when you already know your LBM and just need the daily burn number.
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Body Fat Percentage Calculator
Estimate body fat from a tape measure or skinfold calipers, then chain it into fat mass, lean mass, and a recommended cut deficit. The starting point when you don't know your body fat number.