EVERYDAY
Ratios & concentration
Dimensionless ratios, percentages and parts-per notation.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.000001 ppm1 ppt = 0.000001 ppm
EVERYDAY · ENGINEERING · SCIENCE
ppt to ppm Converter
Convert parts per trillion (ppt) to parts per million (ppm). 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 million 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 ppm Conversion Reference
Parts Per Trillion (ppt) and parts per million (ppm) are units of ratios & concentration. Use this page to convert in either direction.
Conversion Examples
| Parts Per Trillion (ppt) | Parts Per Million (ppm) |
|---|---|
| 1 ppt | 0.000001 ppm |
| 5 ppt | 0.000005 ppm |
| 10 ppt | 0.00001 ppm |
| 100 ppt | 0.0001 ppm |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
ppm to ppt (parts per million to parts per trillion)