Calculate your Total Daily Energy Expenditure (TDEE) from BMR and activity level. Find how many calories you burn per day. Health data never leaves your device — every calculation runs locally in your browser.
Calculate your daily calorie needs from BMR (Mifflin-St Jeor) times activity level. Shows basal burn plus maintenance calories for fitness planning. Health data never leaves your device — every calculation runs locally in your browser.
Log daily calories with one-tap common foods and a running total — simple intake tracking that works. See the day add up as you eat — free, local, no signup.
Compute keto daily calories (TDEE minus 500) with protein at 1.8g/kg and fixed 20g net carbs, fat filling the rest. Hit ketosis without math errors — free, local, informational only.
Compute monthly burn and runway from starting balance, ending balance, and months elapsed. Know exactly how many months remain — free, local, no signup.
Calculate simple interest using principal, rate, and time. Find total interest earned and final amount for basic interest calculations. Figures never leave your device — every calculation runs locally in your browser.
TDEE = BMR × activity multiplier: 1.2 sedentary, 1.375 light, 1.55 moderate, 1.725 heavy, 1.9 athlete. Example: BMR 1,730 × 1.55 (moderate) ≈ 2,680 kcal/day maintenance. Defaults (male, 30, 80 kg, 180 cm, moderate) compute BMR ≈1,780, TDEE ≈2,759, weight-loss target ≈2,259.
300–500 kcal/day → ~0.3–0.5kg/week. A 500 kcal deficit on 2,680 TDEE means eating ≈2,180 kcal. Larger deficits cost muscle and stall faster — slow beats heroic.
Usual suspects: untracked oils/snacks (~200–400 kcal/day), overestimated activity, water retention masking 2–3 weeks of fat loss. Track everything for 2 weeks before adjusting.
Diet dominates — you can't outrun intake (an hour of running ≈ 600 kcal ≈ one burger). Use exercise for health and muscle retention, the calorie target for the scale.
No. All calculations run locally in your browser. No health data is transmitted or stored.
BMR Calculator
Calculates Basal Metabolic Rate using the Mifflin-St Jeor equation with age, sex, height, and weight. Nutritionists use it for diet planning. Health data never leaves your device — every calculation runs locally in your browser.
Macro Calculator
Compute daily protein, carb, and fat macro targets from calories and your own percentage split. Turn any diet into gram numbers — free, local, informational only.
Daily Calorie Needs
Calculate your daily calorie needs from BMR (Mifflin-St Jeor) times activity level. Shows basal burn plus maintenance calories for fitness planning. Health data never leaves your device — every calculation runs locally in your browser.
Last updated October 2026