part per billion (ppb) → part per million (ppm)
1 ppb = 0.001 ppm · ⇄ part per million (ppm) → part per billion (ppb)
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All units in this category
| Converted Value | ||
|---|---|---|
| unit fraction (0–1) | 1 | — |
| percent | % | — |
| permille (parts per thousand) | ‰ | — |
| part per million | ppm | — |
| part per billion | ppb | — |
| part per trillion | ppt | — |
Conversion Formula & Definition
ppm = ppb × 0.001
1 part per billion (ppb) = 0.001 part per million (ppm).
Popular Conversions (Concentration & Parts-Per)
Quick Conversion Reference Table: part per billion (ppb) → part per million (ppm)
| part per billion (ppb) | part per million (ppm) |
|---|---|
| 0.1 ppb | 0.0001 ppm |
| 0.5 ppb | 0.0005 ppm |
| 1 ppb | 0.001 ppm |
| 2 ppb | 0.002 ppm |
| 5 ppb | 0.005 ppm |
| 10 ppb | 0.01 ppm |
| 20 ppb | 0.02 ppm |
| 50 ppb | 0.05 ppm |
| 100 ppb | 0.1 ppm |
| 250 ppb | 0.25 ppm |
| 500 ppb | 0.5 ppm |
| 1,000 ppb | 1 ppm |