EVERYDAY
Ratios & concentration
Dimensionless ratios, percentages and parts-per notation.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.001 ppb1 ppt = 0.001 ppb
EVERYDAY · ENGINEERING · SCIENCE
ppt to ppb Converter
Convert parts per trillion (ppt) 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 trillion 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 ppt | 1 | 1e-12 |
| percentfrom ppt | % | 1e-10 |
| per millefrom ppt | ‰ | 0.000000001 |
| parts per millionfrom ppt | ppm | 0.000001 |
| parts per billionfrom ppt | ppb | 0.001 |
| parts per trillionfrom ppt | ppt | 1 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
ppt to ppb Conversion Reference
Parts Per Trillion (ppt) and parts per billion (ppb) are units of ratios & concentration. Use this page to convert in either direction.
Conversion Examples
| Parts Per Trillion (ppt) | Parts Per Billion (ppb) |
|---|---|
| 1 ppt | 0.001 ppb |
| 5 ppt | 0.005 ppb |
| 10 ppt | 0.01 ppb |
| 100 ppt | 0.1 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 ppt (parts per billion to parts per trillion)