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**Part Per Million**

**Part Per Million (ppm)**is a unit in the category of

*Fraction*. It is also known as parts per million. This unit is commonly used in the INT unit system. Part Per Million (ppm) has a dimension of nil (fraction) where L is length, T is time, N is amount of substance, and I is electric current. It can be converted to the corresponding standard SI unit by multiplying its value by a factor of 1E-006.

Note that the seven base dimensions are M (Mass), L (Length), T (Time), Q (Temperature), N (Aamount of Substance), I (Electric Current), and J (Luminous Intensity).

Other units in the category of Fraction include Carat (karat) (ct, Kt), Part Per Billion (ppb), Part Per Hundred (pph, %), Part Per Hundred Million (pphm), Part Per Hundred Thousand (ppht), Part Per Quadrillion (ppq), Part Per Tera (ppt), and Part Per Thousand (ppt).

**Additional Information**

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**Related Glossary Pages**

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Glossary: Units: Permeability: Grain Per Hour Per Square Foot Per Inch of Mercury (0°C)

Glossary: Units: Electric Conductivity: Siemens Per Centimeter

Glossary: Units: Force: Ton Force (long)

Glossary: Units: Mass Flow Rate: Kilogram Per Hour

Glossary: Units: Electric Dipole Moment: Coulomb Meter

Glossary: Units: Kinematic Viscosity: Stokes

Glossary: Units: Electric Capacitance: Ampere Second Per Volt

Glossary: Units: Angle: Radian

Glossary: Units: Electric Conductivity: Siemens Per Centimeter

Glossary: Units: Permeability: Grain Per Hour Per Square Foot Per Inch of Mercury (0°C)

Glossary: Units: Electric Conductivity: Siemens Per Centimeter

Glossary: Units: Force: Ton Force (long)

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