TDEE & Body Fat Calculator

TDEE calculator, BMR calculator and U.S. Navy body fat calculator in one small app — every result shows the formula with your numbers in it, so you can check the math yourself. Works fully offline. No account, no sign-up, no subscription. Free, supported by ads. WHAT IT CALCULATES • TDEE / maintenance calories — Mifflin-St Jeor with activity multipliers ×1.2 to ×1.9 • BMR (basal metabolic rate) — resting calories on their own • Body fat percentage — U.S. Navy tape method (neck and waist, no gym equipment) and Jackson-Pollock 3-site skinfold for caliper users • Katch-McArdle TDEE — one tap switches the whole app to it once you know your body fat • Calorie deficit calculator — goal weight + target date → daily deficit, with a hard warning below 1,200 kcal/day • Cut, maintain and bulk calorie targets, plus a daily protein figure • Lean mass and fat mass breakdown • Healthy weight range (BMI 18.5–24.9), shown as a range, not a single target • Daily water intake SEE THE MATH Most calorie calculators hide their formula and cap your inputs. This one names the equation on every result and opens a "see the math" sheet you can verify with any pocket calculator. Decimals welcome, no caps on any measurement, 5'10" stays 5'10" in metric. METABOLIC FACTS LABEL Results come as a clean nutrition-label style card: no gauges, no red zones, no judgment. Neutral body fat category ranges — information, not scores. HISTORY & TRENDS • Save results on your phone; weight and body fat trend chart • Optional monthly recalculation reminder PRIVATE BY DESIGN • Your measurements never leave your phone — history is stored locally only • No account, works 100% offline UNITS Full imperial and metric support with lossless conversion. No in-app purchases and no subscriptions — every formula and every calculator is free. Fitness estimates from published equations — not medical advice, no diagnoses.