Calculator
Convert Tiny Concentrations And Rates
Convert between parts per billion (ppb), parts per million (ppm), permille, percent, and decimal values.
Formula: 1‰ = 1000 ppm = 1,000,000 ppb
Ratio Converter
Convert between permille, percent, decimal, basis points, ppm, and ppb.
Percent
Decimal
Basis points
PPM
PPB
What Your Result Means
Permille is a precision-friendly way to represent ratios out of 1,000. Use it when percent feels too coarse or when per-thousand language is standard for your topic.
FAQ
- Where is this converter used?
Air quality, water chemistry, manufacturing tolerance checks, and emissions reporting. - Can values exceed 1000‰?
For ratios and rates tied to a whole, permille usually ranges from 0 to 1000. For abstract concentration units, context matters.