EVERYDAY
Ratios & concentration
Dimensionless ratios, percentages and parts-per notation.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.001 11 ‰ = 0.001 1
EVERYDAY · ENGINEERING · SCIENCE
‰ to 1 Converter
Convert per mille (‰) to ratio (1). 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 per mille value to calculate ratio 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 ‰ | 1 | 0.001 |
| percentfrom ‰ | % | 0.1 |
| per millefrom ‰ | ‰ | 1 |
| parts per millionfrom ‰ | ppm | 1000 |
| parts per billionfrom ‰ | ppb | 1000000 |
| parts per trillionfrom ‰ | ppt | 1000000000 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
‰ to 1 Conversion Reference
Per Mille (‰) and ratio (1) are units of ratios & concentration. Use this page to convert in either direction.
Conversion Examples
| Per Mille (‰) | Ratio (1) |
|---|---|
| 1 ‰ | 0.001 1 |
| 5 ‰ | 0.005 1 |
| 10 ‰ | 0.01 1 |
| 100 ‰ | 0.1 1 |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.