Ampsu

Food and body calculators

Work out a portion, plan your day, or make sense of a tape measurement. Free, no sign-up, and the formulas are on the page.

Food & cooking

Nutrition label

Type in the figures from a food label, per 100 g or per serving, and see the calories, fat, sugar, protein and salt in the amount you ate.

kJ to kcal

Convert kilojoules to kilocalories or back, then work out the energy in your portion from the figure on the pack.

Recipe calories

Add each ingredient from its pack, weigh the finished dish, and see calories and macros for the whole thing, per 100 g, and per serving.

Raw to cooked

Weigh food before and after cooking to find its calories per 100 g cooked. Count the oil and check your portion too.

Daily targets

TDEE

Answer two questions about your week and get the calories you burn in a day, a target for losing or gaining, and every activity level side by side.

TDEE from your log

Work out what you actually burn from a few weeks of eating and weighing, with the scale doing the measuring instead of an activity level you had to guess.

Macros

Set protein and fat from your body weight, and see how much of your daily calories is left for carbs.

Protein

Pick a daily protein target from your weight, compare it with the adult reference and the range for people who train, and split it across meals.

Body measurements

BMI

Enter height and weight to find your adult BMI, its WHO category, and the weight range that falls between BMI 18.5 and 25 at your height.

Body fat

Estimate body fat from a tape measure: neck, waist, height and, for the female formula, hips. See the ACE category and your fat and lean mass.

Waist-to-height

Enter your waist and height to find their ratio, the NICE band it falls in, and the waist size that is half your height.