EVERYDAY
Ratios & concentration
Dimensionless ratios, percentages and parts-per notation.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result1000 ppb1 ppm = 1000 ppb
EVERYDAY · ENGINEERING · SCIENCE
ppm to ppb Converter
Convert parts per million (ppm) to parts per billion (ppb). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through ratio
Enter a parts per million value to calculate parts per billion with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| ratiofrom ppm | 1 | 0.000001 |
| percentfrom ppm | % | 0.0001 |
| per millefrom ppm | ‰ | 0.001 |
| parts per millionfrom ppm | ppm | 1 |
| parts per billionfrom ppm | ppb | 1000 |
| parts per trillionfrom ppm | ppt | 1000000 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
ppm to ppb Conversion Reference
Parts Per Million (ppm) and parts per billion (ppb) are units of ratios & concentration. Use this page to convert in either direction.
Conversion Examples
| Parts Per Million (ppm) | Parts Per Billion (ppb) |
|---|---|
| 1 ppm | 1000 ppb |
| 5 ppm | 5000 ppb |
| 10 ppm | 10000 ppb |
| 100 ppm | 100000 ppb |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
ppb to ppm (parts per billion to parts per million)