Parts per billion to parts per million
Type a value in ppb to get it in ppm instantly.
0.001ppm
Nothing on our list is smaller: the drinking water lead limit is 10× stronger. In a liter of water that is about 0.001 mg.
Convert the other way: ppm to ppb
What it means
How strong is that?
For dilute water solutions 1 ppm equals 1 mg/L, because a liter of water weighs a kilogram. For air and other liquids that shortcut does not hold.
The math
How to convert ppb to ppm
To convert parts per billion to parts per million, multiply by 0.001.
Example: 1 ppb × 0.001 = 0.001 ppm.
In the other direction, 1 ppm = 1,000 ppb.
Every unit
Your concentration in every unit
Tables
ppb to ppm conversion table
| ppb | ppm |
|---|---|
| 0.001 ppb | 1×10⁻⁶ ppm |
| 0.01 ppb | 1×10⁻⁵ 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 |
| 25 ppb | 0.025 ppm |
| 50 ppb | 0.05 ppm |
| 75 ppb | 0.075 ppm |
| 100 ppb | 0.1 ppm |
ppm to ppb conversion table
| ppm | ppb |
|---|---|
| 0.001 ppm | 1 ppb |
| 0.01 ppm | 10 ppb |
| 0.1 ppm | 100 ppb |
| 0.5 ppm | 500 ppb |
| 1 ppm | 1,000 ppb |
| 2 ppm | 2,000 ppb |
| 5 ppm | 5,000 ppb |
| 10 ppm | 10,000 ppb |
| 25 ppm | 25,000 ppb |
| 50 ppm | 50,000 ppb |
| 75 ppm | 75,000 ppb |
| 100 ppm | 100,000 ppb |
Quick answers
Quick answers
- How many ppm is 1 ppb?
- 1 ppb is 0.001 ppm.
- How many ppm is 10 ppb?
- 10 ppb is 0.01 ppm.
The units
About these units
Parts per billion (ppb)
One part in a billion, a thousandth of a ppm. Used for pesticides and heavy metals.
Parts per million (ppm)
One part in a million. Water quality, CO₂ levels and trace metals are reported in ppm.
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