Percent and milligrams per kilogram can describe concentration on the same mass basis. Convert only when the basis and substance match, then retain the original value for checking.
What to check
| Check | What to verify |
|---|---|
| Conversion | One percent by mass equals 10,000 mg/kg. |
| Basis | Do not mix as-fed and dry-matter values. |
| Identity | Match the same nutrient or compound. |
Use this checklist for your own comparison
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One percent by mass equals 10,000 mg/kg.
Do not mix as-fed and dry-matter values.
Match the same nutrient or compound.
A practical example
An illustrative 0.1% equals 1,000 mg/kg on the same mass basis. This is a unit conversion, not a feeding recommendation.
Before you decide
Do not compare the converted value with a per-serving figure without the serving mass.
For the broader task, see Dog-food label comparison.
Reference and scope
AAFCO: understanding pet-food labels provides background for this topic. Not an evaluation of a specific food or individual dietary suitability. The comparison prompts and examples above are practical planning aids, not reports of product testing.