Parts Per Converter
Enter a ratio and convert it between four clearly defined parts-per units.
Parts Per Converter
shown to up to 10 significant digits. ppt = parts per trillion.
A QUICK WALKTHROUGH
How to use this tool
- Enter a finite value up to 1e12.
- Choose source and destination units.
- Read the result and its displayed precision.
Explicit units
This tool defines percent as parts per hundred, ppm as parts per million, ppb as parts per billion, and ppt as parts per trillion. ppt does not mean parts per thousand here.
Finite display
Inputs are limited to finite values from -1e12 to 1e12. Results display up to 10 significant digits, so the text is rounded for presentation.
GOOD TO KNOW
Common questions
What does ppt mean?
Parts per trillion: one part in 1,000,000,000,000.