Concentration - Solution conversion

Convert Part/billion (ppb) to Part/million (ppm)

1 part/billion (ppb) (ppb) equals 0.001 part/million (ppm) (ppm). Enter any value below to convert from ppb to ppm.

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1 ppb = 0.001 ppm

All Concentration - Solution units

From 1 ppb
UnitValue
Kilogram/liter kg/L 0.000000001
Gram/liter g/L 0.000001
Milligram/liter mg/L 0.001
Part/million (ppm) ppm 0.001
Part/billion (ppb) ppb 1
Grain/gallon (US) gr/gal (US) 0.0000584178
Grain/gallon (UK) gr/gal (UK) 0.0000701569
Pound/gallon (US) lb/gal (US) 8.3454044532e-12
Pound/gallon (UK) lb/gal (UK) 0
Pound/million gallon (US) lb/Mgal (US) 0.0000083454
Pound/cubic foot lb/ft³ 0.0000000001
Pound/cubic inch lb/in³ 3.6127292e-14
Kilogram/cubic meter kg/m³ 0.000001
Gram/cubic meter g/m³ 0.001
Milligram/cubic meter mg/m³ 1
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Formula

ppb to ppm conversion formula

Use this relationship for a direct conversion:

ppm = ppb x 0.001

Worked example

2 ppb = 0.002 ppm.

SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.

Quick reference

Part/billion (ppb) to Part/million (ppm) table

Part/billion (ppb) (ppb)Part/million (ppm) (ppm)
0.010.00001
0.10.0001
10.001
20.002
50.005
100.01
250.025
500.05
1000.1
1,0001

From unit

About the part/billion (ppb)

Part/billion (ppb) (ppb) is a unit of Concentration - Solution. 1 ppb = 1e-9 kg/L

Symbol: ppb

To unit

About the part/million (ppm)

Part/million (ppm) (ppm) is a unit of Concentration - Solution. 1 ppm = 1e-6 kg/L

Symbol: ppm

Keep converting

Related conversions

Part/million (ppm) to Part/billion (ppb)Reverse this conversion Part/billion (ppb) to Kilogram/literppb to kg/LPart/billion (ppb) to Gram/literppb to g/LPart/billion (ppb) to Milligram/literppb to mg/L

Source

Conversion standard

The SI framework is checked against NIST Guide for the Use of the International System of Units; conventional factors come from the extended factor inventory. Calculations use full internal precision before display rounding.

View the complete concentration - solution converter

Questions

ppb to ppm FAQ

How do you convert part/billion (ppb) to part/million (ppm)?

Use the formula ppm = ppb x 0.001. 1 part/billion (ppb) (ppb) equals 0.001 part/million (ppm) (ppm).

Is the ppb to ppm conversion exact?

SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.