Concentration converter
16 units, SI unit %. Every conversion runs through the SI base value, so round-trips are exact.
1 ppm = 0.0001 %
1 ppm in every concentration unit
| part per trillion | 1,000,000 ppt |
| nanogram per liter | 1,000,000 ng/L |
| parts per billion | 1,000 ppb |
| microgram per liter | 1,000 μg/L |
| parts per million | 1 ppm |
| part per million by volume | 1 ppmv |
| milligram per kilogram | 1 mg/kg |
| milligram per liter | 1 mg/L |
| grain per US gallon (as CaCO₃) | 0.058418 gpg |
| part per thousand | 0.001 ppth |
| gram per liter | 0.001 g/L |
| percent | 0.0001 % |
| percent by weight | 0.0001 % w/w |
| percent by volume | 0.0001 % v/v |
| percent weight per volume | 0.0001 % w/v |
| fraction (0–1) | 0.000001 fraction |
One percent in every unit
| part per trillion (ppt) | 10,000,000,000 ppt |
| nanogram per liter (ng/L) | 10,000,000,000 ng/L |
| parts per billion (ppb) | 10,000,000 ppb |
| microgram per liter (μg/L) | 10,000,000 μg/L |
| parts per million (ppm) | 10,000 ppm |
| part per million by volume (ppmv) | 10,000 ppmv |
| milligram per kilogram (mg/kg) | 10,000 mg/kg |
| milligram per liter (mg/L) | 10,000 mg/L |
| grain per US gallon (as CaCO₃) (gpg) | 584.18039 gpg |
| part per thousand (ppth) | 10 ppth |
| gram per liter (g/L) | 10 g/L |
| percent (%) | 1 % |
| percent by weight (% w/w) | 1 % w/w |
| percent by volume (% v/v) | 1 % v/v |
| percent weight per volume (% w/v) | 1 % w/v |
| fraction (0–1) (fraction) | 0.01 fraction |
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