Your numbers. Instantly.

Science-based fitness and nutrition calculators. Calories, macros, BMI, protein, strength and running, with no apps and no accounts.

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How many calories you need to maintain, lose or gain weight.

Grams of protein, carbs and fat for your goal.

Your body mass index and healthy weight range.

Grams of protein you need per day and per meal.

Your estimated max lift and a training percentage chart.

Pace per mile or km, finish time and 5K-to-marathon predictions.

We use Mifflin-St Jeor, Epley, Brzycki and Riegel, and explain every step so you know where each number comes from.

Everything runs in your browser. We never store your weight, age or any other data.

Pounds and feet or kilograms and centimeters: switch with one tap.