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**A.u. of Action**

**A.u. of Action (a.u.)**is a unit in the category of

*Angular momentum, Action*. It is also known as atomic units, u.a., au, ua. This unit is commonly used in the a.u. unit system. A.u. of Action (a.u.) has a dimension of ML

^{2}T

^{-1}where M is mass, L is length, and T is time. It can be converted to the corresponding standard SI unit J-s by multiplying its value by a factor of 1.05457266E-034.

Other units in the category of Angular momentum, Action include A.u. of Angular Momentum (a.u.), Joule-Second (J-s), Newton-Meter-Second (N-m-s), Planck (planck), Pound Force-Foot-Second (lbf-ft-s), and Pound Force-Inch-Second (lbf-in-s).

**Additional Information**

**Related Glossary Pages**

Glossary: Units: Volume: Kilderkin (UK)

Glossary: Units: Area Moment of Inertia: Bisquare Meter

Glossary: Units: Mass: Atomic Unit of Mass (12C)

Glossary: Units: Angle: Percent

Glossary: Units: Logarithm of a Ratio: Neper

Glossary: Units: Logarithm of a Ratio: Decibel (voltage)

Glossary: Units: Thermal Heat Transfer Coefficient: Watt Per Square Meter Per Kelvin

Glossary: Units: Acoustic Impedance: Psi Second Per Cubic Foot

Glossary: Units: Permeability Coefficient: Perm-Mil (0°C)

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