Percent to mg/kg Converter
Common Conversions
| % | mg/kg |
|---|---|
| 0.0001 | 1 |
| 0.001 | 10 |
| 0.01 | 100 |
| 0.1 | 1000 |
| 0.5 | 5000 |
| 1 | 10000 |
| 2.5 | 25000 |
| 5 | 50000 |
| 10 | 100000 |
| 25 | 250000 |
| 50 | 500000 |
| 100 | 1000000 |
Why this conversion matters in chemistry
Mining cleanup math runs on this conversion constantly. A 2.5% w/w copper grade in an ore feed is 25,000 mg/kg in soil — and the EPA residential screening level for copper is 410 mg/kg, so a former smelter site reads roughly 60 times above the threshold without any further analysis. The 10,000 factor is just a scale relabel: percent is parts per hundred, mg/kg is parts per million, and a million divided by a hundred is 10,000. There's no chemistry hiding in the conversion itself, only in deciding which scale fits the question.
Formula
Worked Examples
The conversion anchor — exactly 1% w/w = 10,000 ppm.
0.1% — about a typical trace-impurity bulk specification.
0.01% — the kind of figure that bridges trace and bulk regimes.
5% — about the metal content of a bulk-mineral concentrate.