Part-per Million [ppm] to Part-per Billion [ppb] Converter

Quick Reference

1 Part-per Million (ppm) = 1000 Part-per Billion (ppb)

1 Part-per Billion (ppb) = 0.001 Part-per Million (ppm)

How to Convert Part-per Million to Part-per Billion

1 ppm = 1000 ppb
1 ppb = 0.001 ppm

To convert Part-per Million to Part-per Billion, multiply the value by 1000. To convert Part-per Billion back to Part-per Million, divide by 1000.

Example: convert 10 ppm to ppb:
10 ppm = 10 x 1000 = 10000 ppb

↔ Convert Part-per Billion to Part-per Million

Part-per Million

Definition: Parts per million (ppm) is a way of expressing very dilute concentrations of substances. It represents the number of parts of a substance per million parts of the mixture.

History/origin: The concept of parts per million arose out of the need to express very small concentrations of substances in a convenient way. It is widely used in chemistry, environmental science, and engineering.

Current use: PPM is commonly used to measure the concentration of pollutants in air and water, the concentration of trace elements in materials, and the concentration of additives in food and beverages.

Part-per Billion

Definition: Parts per billion (ppb) is a way of expressing extremely dilute concentrations of substances. It represents the number of parts of a substance per billion parts of the mixture.

History/origin: Similar to ppm, ppb was developed to express even smaller concentrations than ppm. It's a natural extension of the parts-per notation system.

Current use: PPB is used when measuring extremely low levels of contaminants or trace elements, for example, in sensitive environmental monitoring or in advanced chemical analysis.

Part-per Million to Part-per Billion Conversion Table

Part-per Million [ppm]	Part-per Billion [ppb]
1 ppm	1000 ppb
2 ppm	2000 ppb
5 ppm	5000 ppb
10 ppm	10000 ppb
20 ppm	20000 ppb
50 ppm	50000 ppb
100 ppm	100000 ppb
200 ppm	200000 ppb
500 ppm	500000 ppb
1000 ppm	1000000 ppb

Common pairs of Parts per

Part-per Million

Part-per Million to Part-per Billion Part-per Million to Part-per Trillion Part-per Million to Part-per Quadrillion

Part-per Billion

Part-per Billion to Part-per Million Part-per Billion to Part-per Trillion Part-per Billion to Part-per Quadrillion

Part-per Trillion

Part-per Trillion to Part-per Million Part-per Trillion to Part-per Billion Part-per Trillion to Part-per Quadrillion

Part-per Quadrillion

Part-per Quadrillion to Part-per Million Part-per Quadrillion to Part-per Billion Part-per Quadrillion to Part-per Trillion

Part-per Million [ppm] to Part-per Billion [ppb] Converter

To convert Part-per Million to Part-per Billion, enter your value in the ppm field above and the result in ppb will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your ppm value by the fixed conversion ratio to get the equivalent in ppb.

Our Part-per Million to Part-per Billion converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select ppb as your input unit and ppm as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between Part-per Million and Part-per Billion comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the Part-per Million to Part-per Billion converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

Part-per Million and Part-per Billion are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

Part-per Million [ppm] to Part-per Billion [ppb] Converter

Quick Reference

1 Part-per Million (ppm) = 1000 Part-per Billion (ppb)

1 Part-per Billion (ppb) = 0.001 Part-per Million (ppm)

How to Convert Part-per Million to Part-per Billion

1 ppm = 1000 ppb
1 ppb = 0.001 ppm

To convert Part-per Million to Part-per Billion, multiply the value by 1000. To convert Part-per Billion back to Part-per Million, divide by 1000.

Example: convert 10 ppm to ppb:
10 ppm = 10 x 1000 = 10000 ppb

↔ Convert Part-per Billion to Part-per Million

Part-per Million

Definition: Parts per million (ppm) is a way of expressing very dilute concentrations of substances. It represents the number of parts of a substance per million parts of the mixture.

Part-per Billion

Definition: Parts per billion (ppb) is a way of expressing extremely dilute concentrations of substances. It represents the number of parts of a substance per billion parts of the mixture.

History/origin: Similar to ppm, ppb was developed to express even smaller concentrations than ppm. It's a natural extension of the parts-per notation system.

Current use: PPB is used when measuring extremely low levels of contaminants or trace elements, for example, in sensitive environmental monitoring or in advanced chemical analysis.

Part-per Million to Part-per Billion Conversion Table

Part-per Million [ppm]	Part-per Billion [ppb]
1 ppm	1000 ppb
2 ppm	2000 ppb
5 ppm	5000 ppb
10 ppm	10000 ppb
20 ppm	20000 ppb
50 ppm	50000 ppb
100 ppm	100000 ppb
200 ppm	200000 ppb
500 ppm	500000 ppb
1000 ppm	1000000 ppb

Common pairs of Parts per

Part-per Million

Part-per Million to Part-per Billion Part-per Million to Part-per Trillion Part-per Million to Part-per Quadrillion

Part-per Billion

Part-per Billion to Part-per Million Part-per Billion to Part-per Trillion Part-per Billion to Part-per Quadrillion

Part-per Trillion

Part-per Trillion to Part-per Million Part-per Trillion to Part-per Billion Part-per Trillion to Part-per Quadrillion

Part-per Quadrillion

Part-per Quadrillion to Part-per Million Part-per Quadrillion to Part-per Billion Part-per Quadrillion to Part-per Trillion