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Convert Parts per Million to Parts per Billion

1 part per million = 1,000 parts per billion. Multiply the number of parts per million by 1000.

Result
1,000

1 ppm = 1,000 ppb

Multiply the number of parts per million by 1000.

Results are rounded for display. Double-check values for critical work.

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Parts per Million to Parts per Billion table

Parts per MillionParts per Billion
1 ppm1,000 ppb
2 ppm2,000 ppb
3 ppm3,000 ppb
4 ppm4,000 ppb
5 ppm5,000 ppb
10 ppm10,000 ppb
20 ppm20,000 ppb
25 ppm25,000 ppb
50 ppm50,000 ppb
100 ppm100,000 ppb
500 ppm500,000 ppb
1000 ppm1,000,000 ppb

About these units

The part per million (ppm) is a specialist or regional unit of percentage & parts, equal to 0.000001 fractions.

The part per billion (ppb) is a specialist or regional unit of percentage & parts, equal to 1e-9 fractions.

Going the other way, 1 part per billion = 0.001 parts per million. Water quality reports use parts per million, finance uses basis points, and everyone else uses percent. They are all just fractions with different scaling.

Frequently asked

How many parts per billion are in a part per million?
1 part per million = 1,000 parts per billion.
How do you convert parts per million to parts per billion?
Multiply the number of parts per million by 1000.
What is 10 ppm in ppb?
10 ppm = 10,000 ppb.

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