# PPM Converter

Use our ppm converter to convert concentrations in one unit to other parts-per expressions.

## How to Convert a Concentration to PPM

Understanding how to convert parts-per units like parts per billion (ppb) and parts per cent (%) to parts per million (ppm) is essential for chemists, scientists, and other students or professionals who work with concentration amounts.

Some common parts-per expressions for concentration amounts are:

**parts per cent (%):**1 part per 100**parts per mille (‰):**1 part per 1000**parts per ten thousand (‱):**1 part per 10,000**parts per hundred thousand (pcm):**1 part per 100,000**parts per million (ppm):**1 part per 1,000,000**parts per billion (ppb):**1 part per 1,000,000,000**parts per trillion (ppt):**1 part per 1,000,000,000,000

To convert concentration between these units, you need to understand the basic conversion factors between them. The table below shows the equivalent values for various concentrations.

% | ‰ | ‱ | pcm | ppm | ppb | |
---|---|---|---|---|---|---|

% | 1 | 0.1 | 0.01 | 0.001 | 0.0001 | 10^{−7} |

‰ | 10 | 1 | 0.1 | 0.01 | 0.001 | 10^{−6} |

‱ | 100 | 10 | 1 | 0.1 | 0.01 | 10^{−5} |

pcm | 1,000 | 100 | 10 | 1 | 0.1 | 0.0001 |

ppm | 10,000 | 1,000 | 100 | 10 | 1 | 0.001 |

ppb | 10^{7} |
10^{6} |
10^{5} |
10,000 | 1,000 | 1 |

For instance, to convert ppm to a percent, the conversion ratio shown in the table is 0.0001.

**For example,** let’s convert 5 parts per million to parts per billion.

Start by finding the column in the conversion value in the table above for *ppm*, since that’s the starting expression. Note that the conversion to ppb is *1,000* in the table.

Next, multiply 5 ppm to ppb by multiplying by 1,000.

5 ppm × 1,000 = 5,000 ppb

So, a concentration of 5 ppm is equal to 5,000 ppb.

You can also use our ppm to ppb converter to solve this.

You can use our ppm calculator to calculate a concentration in parts per million.