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Free health calculators that explain the answer

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32 reviewed tools in Weight and nutrition

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Illustrative nutrition-label diagram: 3 g saturated fat in 30 g food scales to 10 g per 100 g. This is a synthetic example, not a real product or dietary target.FreeWeight and nutrition

Saturated Fat per 100 g Calculator

Convert saturated fat in a matching food serving to grams per 100 g. Compare like labels with exact arithmetic, clear limits and no personal dietary target.

Open toolSynthetic example showing a 500 g package divided by a matching 40 g serving equals 12.50 theoretical servings; no personal portion is recommended.FreeWeight and nutrition

Servings per Package Calculator

Divide package quantity by a matching serving quantity to estimate servings, including fractions. Use the same units and food state; no portion advice.

Open toolIllustrated nutrition label with sodium and serving mass fields leading to a sodium-per-100-gram comparison; no food value is shown.FreeWeight and nutrition

Sodium per 100 g calculator

Convert labelled sodium per serving and its matching serving weight to milligrams per 100 g. Compare like foods on a common basis. Free and private.

Open toolFreeWeight and nutrition

Sodium to salt converter

Convert food-label sodium in milligrams to salt equivalent in grams, or salt grams back to sodium, using the standard 2.5 factor.

Open toolDiagram of total sugars and serving size from one food label leading to a per 100 g comparison; no food result is shown.FreeWeight and nutrition

Total sugar per 100 g calculator

Convert labelled total sugars per serving and matching serving weight into grams per 100 g. Compare like foods on a common basis. Free and private.

Open toolFreeWeight and nutrition

Waist-to-height ratio calculator (WHtR)

Calculate your waist-to-height ratio and equivalent percentage in centimetres or inches. See careful measurement guidance and limitations without a risk label.

Open toolFreeWeight and nutrition

Waist-to-hip ratio calculator (WHR)

Calculate an adult waist-to-hip ratio in centimetres or inches, with clear tape-measure guidance, uncertainty and no automatic health-risk label.

Open toolFreeWeight and nutrition

Weight loss percentage calculator

Calculate weight change as a percentage of your starting weight. See the amount and whether the current value is lower, higher or unchanged.

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