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Per Serving ↔ Per 100 g Converter
Enter the serving size and one value from the label, either per serving or per 100 g/ml, and the other fills in. It works for calories, grams of fat, protein, sugar or any other number on the label. It runs entirely in your browser; nothing you type is sent or stored.
Worked example: 150 kcal per 30 g serving is 150 × 100 ÷ 30 = 500 kcal per 100 g. Going back, 20 g protein per 100 g in a 45 g serving is 20 × 45 ÷ 100 = 9 g per serving.
Frequently asked questions
How do I convert per serving to per 100 g?
Multiply the per-serving value by 100 and divide by the serving size in grams (or ml). To go back, multiply the per-100 g value by the serving size and divide by 100.
Why compare products per 100 g?
Serving sizes are set by each manufacturer and vary from product to product, so per 100 g is the like-for-like basis.
Can I skip typing the label?
Yes. Nyamly, an iPhone app that is free to download, reads a product's nutrition facts straight from its barcode, so there is no manual entry and no photographing a label.
Skip typing the label: scan the barcode
Nyamly is an iPhone calorie tracker and barcode scanner, free to download. It reads a product's nutrition facts straight from its barcode — no manual entry, no photographing a label.