Parts per million to parts per billion
Type a value in ppm to get it in ppb instantly.
1,000ppb
That's 20× as concentrated as an ozone alert, while pool chlorine is 2× stronger. In a liter of water that is about 1 mg.
Convert the other way: ppb to ppm
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 ppm to ppb
To convert parts per million to parts per billion, multiply by 1,000.
Example: 1 ppm × 1,000 = 1,000 ppb.
In the other direction, 1 ppb = 0.001 ppm.
Every unit
Your concentration in every unit
Tables
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 |
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 |
Quick answers
Quick answers
- How many ppb is 1 ppm?
- 1 ppm is 1,000 ppb.
- How many ppb is 10 ppm?
- 10 ppm is 10,000 ppb.
The units
About these units
Parts per million (ppm)
One part in a million. Water quality, CO₂ levels and trace metals are reported in ppm.
Parts per billion (ppb)
One part in a billion, a thousandth of a ppm. Used for pesticides and heavy metals.
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