Know your numbers. Eat with confidence.
Free calculators for calories, macros, BMI and water, and a no-nonsense guide to the vitamins and minerals your body needs. No sign-up, no ads.
Calculators
- Calorie calculatorHow many calories you need a day to lose, maintain or gain weight — with a macro split.
- Macro calculatorTurn your calorie target into grams of protein, fat and carbs: balanced, low-carb or high-protein.
- BMI calculatorYour body mass index, WHO weight category and the healthy weight range for your height.
- Water intake calculatorHow much fluid you need a day based on your weight and activity — in liters and glasses.
Vitamins and minerals, explained
What each nutrient does, how much you need a day, signs of deficiency and excess, and the foods that provide the most.
Browse the nutrient guide