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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**

N/A

**Related Glossary Pages**

Glossary: Units: Mass: Ton (US, Short)

Glossary: Units: Power (Heat Flow): Calorie (IT) Per Minute

Glossary: Units: Volume: Drachm (US, Liq.)

Glossary: Units: Volume: Cubic Centimeter (Mohr Cubic Centimeter)

Glossary: Units: Thermal Resistance Coefficient: Tog

Glossary: Units: Area: Barrel (US, Liq.) Per Foot

Glossary: Units: Volume Flow Rate: Gallon (US, Liq.) Per Minute

Glossary: Units: Pressure: Ton Force (short) Per Square Foot

Glossary: Units: Mass Moment of Inertia: Pound Mass-Square Inch

Glossary: Units: Energy Density: British Thermal Unit (IT) Per Gallon (UK)

Glossary: Units: Power (Heat Flow): Calorie (IT) Per Minute

Glossary: Units: Volume: Drachm (US, Liq.)

Glossary: Units: Volume: Cubic Centimeter (Mohr Cubic Centimeter)

Glossary: Units: Thermal Resistance Coefficient: Tog

Glossary: Units: Area: Barrel (US, Liq.) Per Foot

Glossary: Units: Volume Flow Rate: Gallon (US, Liq.) Per Minute

Glossary: Units: Pressure: Ton Force (short) Per Square Foot

Glossary: Units: Mass Moment of Inertia: Pound Mass-Square Inch

Glossary: Units: Energy Density: British Thermal Unit (IT) Per Gallon (UK)

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