For a mass-based concentration, one part per million corresponds to one milligram per kilogram. Confirm that the document uses that basis before translating the number.
What to check
| Check | What to verify |
|---|---|
| Definition | Check the concentration basis. |
| Substance | Keep the named ingredient or nutrient unchanged. |
| Source | Save the technical sheet alongside the package. |
Use this checklist for your own comparison
Record product details, quotes or unanswered questions. Notes stay in this tab; download them before leaving.
Check the concentration basis.
Keep the named ingredient or nutrient unchanged.
Save the technical sheet alongside the package.
A practical example
An illustrative 20 ppm by mass can be recorded as 20 mg/kg, while preserving the original notation in a second column.
Before you decide
The conversion does not say whether the amount is appropriate for a particular dog.
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.