Calorie calculator
Your maintenance level plus a target for losing weight at a pace you choose. The one most people want.
Open the calculatorFree calculators
Eight of them, each on its own page, each finished in about twenty seconds. They run in the browser, they do not ask for an email, and none of them hold the answer back until you sign up.
TDEE calculator
Total daily energy expenditure — what you burn once activity is counted, with every multiplier side by side.
Open the calculatorCalorie deficit calculator
Pick a rate of loss and see the daily gap it needs, the target to eat and roughly how long it takes.
Open the calculatorMacro calculator
Split a calorie target into protein, carbs and fat — adjusted for keto, vegetarian, plant-based and four others.
Open the calculatorProtein calculator
A daily protein target from body weight, training load and goal, with what it looks like on a plate.
Open the calculatorBMI calculator
Body mass index, the category it falls in, and the weight range considered healthy for your height.
Open the calculatorBody fat calculator
The US Navy tape method — body fat percentage, fat mass and lean mass from three measurements.
Open the calculatorWater intake calculator
A daily fluid target from body weight, activity and climate, and a way to spread it across the day.
Open the calculatorWould rather answer questions than fill in fields? The short quiz asks what your week actually looks like and returns the same numbers with a plan attached. Curious about fasting instead? The fasting quiz works out which eating window suits your day. For tracking, Joules is free (Google Play — iOS soon).
Content last reviewed 29 August 2026. Estimates for healthy adults, not medical advice.