EVERYDAY
Ratios & concentration
Dimensionless ratios, percentages and parts-per notation.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.000000001 ‰1 ppt = 0.000000001 ‰
EVERYDAY · ENGINEERING · SCIENCE
ppt to ‰ Converter
Convert parts per trillion (ppt) to per mille (‰). 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 per mille 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 ‰ Conversion Reference
Parts Per Trillion (ppt) and per mille (‰) are units of ratios & concentration. Use this page to convert in either direction.
Conversion Examples
| Parts Per Trillion (ppt) | Per Mille (‰) |
|---|---|
| 1 ppt | 0.000000001 ‰ |
| 5 ppt | 0.000000005 ‰ |
| 10 ppt | 0.00000001 ‰ |
| 100 ppt | 0.0000001 ‰ |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
‰ to ppt (per mille to parts per trillion)