How It Works
This converter works in 3 steps.
Enter the value
Type a percent or a ppm value.
Choose the basis
Select w/w, w/v, or v/v for both sides.
Read the converted values
The converter multiplies or divides by 10,000 and lists ppb as well.
Check the unit form
The converter shows mg/kg, mg/L, or µL/L depending on the basis.
The Formula
The formula multiplies percent by 10,000.
ppm = % × 10,000% = ppm / 10,000ppb = ppm × 1,000- %:
- Parts per hundred
- ppm:
- Parts per million on the same basis
- ppb:
- Parts per billion on the same basis
A 0.5% w/v sodium hypochlorite solution contains 5,000 ppm (5,000 mg/L) sodium hypochlorite.
Conversion Table
The conversion table converts 7 percent values into ppm, ppb, and g/L on the w/v basis.
| Percent | ppm | ppb | Mass per volume |
|---|---|---|---|
| 100% | 1,000,000 ppm | 1,000,000,000 ppb | 1,000 g/L (w/v basis) |
| 10% | 100,000 ppm | 100,000,000 ppb | 100 g/L (w/v basis) |
| 1% | 10,000 ppm | 10,000,000 ppb | 10 g/L (w/v basis) |
| 0.5% | 5,000 ppm | 5,000,000 ppb | 5 g/L (w/v basis) |
| 0.1% | 1,000 ppm | 1,000,000 ppb | 1 g/L (w/v basis) |
| 0.01% | 100 ppm | 100,000 ppb | 0.1 g/L (w/v basis) |
| 0.0001% | 1 ppm | 1,000 ppb | 0.001 g/L (w/v basis) |
What Is the Percent-to-PPM Converter?
The Percent-to-PPM Converter is a tool that converts a percent concentration into parts per million (ppm), and back, on a matching basis. One percent equals 10,000 ppm, since percent counts parts per 100 and ppm counts parts per 1,000,000.
The conversion is exact only when both values use the same basis. 1% w/w equals 10,000 ppm w/w (10,000 mg/kg), and 1% w/v equals 10,000 ppm w/v (10,000 mg/L). The converter keeps the basis label on the result, so 1% v/v does not get reported as 10,000 mg/L.
Common Uses
There are 5 main uses of this converter.
Disinfectant labels
Users convert 6% bleach labels into 60,000 ppm sodium hypochlorite.
Impurity limits
QC teams compare 0.1% impurity specs with 1,000 ppm results.
Fertilizer analysis
Growers convert nutrient percent to ppm in solution.
Alloy composition
Metallurgists convert trace element percent to ppm.
Gas concentration
Safety officers convert 0.5% v/v CO₂ to 5,000 ppm.