Convert percent to parts per million
1 % = 10,000 ppm
1 % = 10,000 ppm
1 % in every concentration unit
| percent | 1 % |
| fraction (0–1) | 0.01 fraction |
| parts per million | 10,000 ppm |
| parts per billion | 10,000,000 ppb |
| grain per US gallon (as CaCO₃) | 584 gpg |
How the conversion works
Multiply by 10,000 to go from percent to parts per million, or divide by it to go back. Every conversion on this site routes through the SI value (%) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? parts per million to percent — 1 ppm = 0.0001 %.
percent to parts per million — common values
| 1 % | 10,000 ppm |
| 2 % | 20,000 ppm |
| 3 % | 30,000 ppm |
| 5 % | 50,000 ppm |
| 10 % | 100,000 ppm |
| 15 % | 150,000 ppm |
| 20 % | 200,000 ppm |
| 25 % | 250,000 ppm |
| 50 % | 500,000 ppm |
| 75 % | 750,000 ppm |
| 100 % | 1,000,000 ppm |
| 250 % | 2,500,000 ppm |
| 500 % | 5,000,000 ppm |
| 1000 % | 10,000,000 ppm |