How to Convert ppb to ppm
To convert ppb to ppm, divide the value by 1000.
The Formula
ppm = ppb ÷ 1000
Key Fact
1 parts per million = 1000 ppb
Tip: To convert ppm back to ppb, multiply by 1000.
PPB to PPM
Convert ppb (ppb) to ppm (ppm) with formulas, examples, and conversion tables.
ppb
ppm
1 ppb = 0.001 ppm
Full precision:0.001 ppm
Step-by-Step Solution
To convert 1 ppb to ppm, we divide by 1000 because one parts per million equals exactly 1000 ppb.
1 parts per million = 1000 ppb
Since there are 1000 ppb in every parts per million, we divide our value by this factor:
1 ÷ 1000 = 0.001 ppm
So 1 ppb = 0.001 ppm.
Quick check: 0.001 × 1000 = 1 ppb
Example Conversions
Example 1: 1 ppb = 0.001 ppm
1 ÷ 1000 = 0.001
1 ÷ 1000 = 0.001
Example 2: 5 ppb = 0.005 ppm
5 ÷ 1000 = 0.005
5 ÷ 1000 = 0.005
Example 3: 10 ppb = 0.01 ppm
10 ÷ 1000 = 0.01
10 ÷ 1000 = 0.01
ppb to ppm Table
| ppb | 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 |
| 25 ppb | 0.025 ppm |
| 50 ppb | 0.05 ppm |
| 100 ppb | 0.1 ppm |
| 250 ppb | 0.25 ppm |
| 500 ppb | 0.5 ppm |
| 1000 ppb | 1 ppm |
1 Parts per Billion in Other Units
| Unit | 1 ppb = |
|---|---|
| PPB to PPM | 0.001 ppm |
| ppb to ppt | 1000 ppt |
| ppb to Percent | 1e-7 % |
| ppb to Per Mille | 0.000001 ‰ |
| ppb to mg/L | 0.001 mg/L |
| ppb to g/L | 0.000001 g/L |
| ppb to μg/L | 1 μg/L |
| ppb to mg/m³ | 1 mg/m³ |