PPM Calculator
Convert between parts per million, percentage, per mille, parts per billion and trillion
Concentration Unit Converter
Enter any concentration value to see all conversions
Number (Decimal)
0
Input unit
Percentage (%)
0%
Per Mille (‰)
0‰
Parts per Million (ppm)
0 ppm
Parts per Billion (ppb)
0 ppb
Parts per Trillion (ppt)
0 ppt
Conversion Formulas
To Percentage: decimal × 100
To Per Mille: decimal × 1,000
To PPM: decimal × 1,000,000
To PPB: decimal × 1,000,000,000
To PPT: decimal × 1,000,000,000,000
From %: percentage ÷ 100
Common Conversion Examples
| Decimal | Percentage | Per Mille | PPM | PPB |
|---|---|---|---|---|
| 1 | 100% | 1,000‰ | 1,000,000 ppm | 1.00×10⁹ ppb |
| 0.1 | 10% | 100‰ | 100,000 ppm | 1.00×10⁸ ppb |
| 0.01 | 1% | 10‰ | 10,000 ppm | 1.00×10⁷ ppb |
| 0.001 | 0.1% | 1‰ | 1,000 ppm | 1.00×10⁶ ppb |
| 0.000001 | 0.0001% | 0.001‰ | 1 ppm | 1,000 ppb |
| 0.000000001 | 1.00×10⁻⁷% | 1.00×10⁻⁶‰ | 0.001 ppm | 1 ppb |
Real-World Examples
Atmospheric CO₂
~420 ppm (2023)
0.042% of atmosphere
Swimming Pool Chlorine
1-3 ppm
Safe disinfection level
Drinking Water TDS
50-300 ppm
Total dissolved solids
Blood Alcohol (Legal)
800 ppm (0.08%)
Legal limit in many countries
Quick Reference
1% =10,000 ppm
1‰ =1,000 ppm
1 ppm =1,000 ppb
1 ppb =1,000 ppt
PPM = Parts Per Million
PPB = Parts Per Billion
PPT = Parts Per Trillion
PPB = Parts Per Billion
PPT = Parts Per Trillion
Understanding PPM and Concentration Units
What are Parts Per Million (PPM)?
Parts per million (ppm) is a unit of measurement used to express very small concentrations. One ppm means that for every million parts of a solution, one part is the substance of interest. It's equivalent to 1 milligram per kilogram (mg/kg) or 1 milligram per liter (mg/L) for water.
Common Applications
- •Environmental monitoring (air and water quality)
- •Chemical analysis and laboratory testing
- •Swimming pool and water treatment
- •Food safety and quality control
Unit Relationships
Percentage (%)
1 part per 100
Per Mille (‰)
1 part per 1,000
Parts per Million (ppm)
1 part per 1,000,000
Parts per Billion (ppb)
1 part per 1,000,000,000
Example Calculation
If you have a salt solution with 0.005 grams of salt in 1 kilogram (1,000 grams) of total solution:
Decimal: 0.005 ÷ 1,000 = 0.000005
Percentage: 0.000005 × 100 = 0.0005%
Per mille: 0.000005 × 1,000 = 0.005‰
PPM: 0.000005 × 1,000,000 = 5 ppm
PPB: 0.000005 × 1,000,000,000 = 5,000 ppb