GIFSQ Tools · Module 11 — Ingredients, Additives & Formulation · Tool 204 of 500
Convert an additive addition into mg/kg (ppm) and % w/w, and show how much of the legal limit it uses — with the jurisdiction of that limit stated.
Try sample values — fills the form with the worked example below.
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Concentration (mg/kg)
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Concentration (% w/w)
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Of the limit used (%)
Equation: Concentration (mg/kg) = additive (mg) ÷ food (kg). Concentration (% w/w) = additive (g) ÷ food (g) × 100. Limit used (%) = concentration ÷ legal maximum × 100.
Method: Additive concentration against the maximum level in the jurisdiction you select: Codex General Standard for Food Additives CXS 192-1995, EU Regulation (EC) No 1333/2008, or US FDA 21 CFR. Limits differ between jurisdictions and between food categories — enter the limit for your exact food category from the regulation itself.
Assumptions: the additive is evenly distributed through the batch; the limit entered is the maximum for this food category in the chosen jurisdiction.
Limitations: this tool does not look up the limit for you and does not check whether the additive is permitted in this food at all — both must be confirmed in the regulation before use.
Rounding: mg/kg to 2 decimal places; % w/w to 4 decimal places; limit used to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Additive concentration against the maximum level in the jurisdiction you select: Codex General Standard for Food Additives CXS 192-1995, EU Regulation (EC) No 1333/2008, or US FDA 21 CFR. Limits differ between jurisdictions and between food categories — enter the limit for your exact food category from the regulation itself.
Assumptions: the additive is evenly distributed through the batch; the limit entered is the maximum for this food category in the chosen jurisdiction.
Limitations: this tool does not look up the limit for you and does not check whether the additive is permitted in this food at all — both must be confirmed in the regulation before use.
Rounding: mg/kg to 2 decimal places; % w/w to 4 decimal places; limit used to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: 0.5 g of additive in a 10 kg batch: 500 mg ÷ 10 kg = 50.00 mg/kg (0.0050% w/w); against a Codex GSFA limit of 200 mg/kg that is 25.00% of the limit.
Enter values above to see results.
Limits are jurisdiction-specific: a Codex, EU and US limit for the same additive in the same food can all differ. Always cite the jurisdiction. Tool 204 of 500 — GIFSQ
