PPM to PPB Converter
Convert parts per million (ppm) to parts per billion (ppb). Type a number in either box and the result appears as you type.
Enter a number, for example 12.5
1 part per million = 1,000 parts per billion
Formula: ppb = ppm × 1,000
How to convert parts per million to parts per billion
1 part per million = 1,000 parts per billion
To convert parts per million to parts per billion, multiply the value by 1,000.
Example: 5 ppm × 1,000 = 5,000 ppb
PPM to PPB conversion table
| Part per million (ppm) | Part per billion (ppb) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 75 | 75,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
About parts per million and parts per billion
Part per million (ppm)
One part in a million by mass, 1 mg per kg. For water and dilute solutions in water, 1 ppm equals 1 mg/L. Used for chlorine, TDS and nutrients.
Part per billion (ppb)
One part in a billion by mass, 1 µg per kg. For water, 1 ppb equals 1 µg/L. Used for trace contaminants.
Frequently asked questions
What is 1 ppm in parts per billion?
1 ppm = 1,000 ppb.
What is 1 ppb in parts per million?
1 ppb = 0.001 ppm.
How do I convert parts per million to parts per billion?
To convert parts per million to parts per billion, multiply the value by 1,000. 1 part per million = 1,000 parts per billion.