Atomic mass unit conversions

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Mass Conversions: atomic mass unit conversions - convert atomic mass units to:
Convert atomic mass units to

The online converter calculator on this page allows you to select the mass/weight measurement unit you want to convert to starting from atomic mass units (amu). To make a conversion starting from a unit of mass other than atomic mass unit, simply click on the "Reset" button.

What is atomic mass unit?

Definition:

The unified atomic mass unit (or dalton) is a unit of mass defined as 1/12 weight of carbon-12 in its nuclear and electronic ground state.

    1 u = 1/12 m(12C)

The atomic mass unit is equal to 1.660538921(73) × 10-27 kilograms (1 u = 1.660538921(73) × 10-27 kg), the base unit of mass in the International System of Units (SI). It is also equal to 1,822.88839 electron rest mass (me).

The energy equivalent of 1 amu:
1 amu = 931.494061(21) × 106 eV/c2 = 931.494061(21) MeV/c2 = 0.931494061(21) GeV/c2

The atomic mass unit is used to indicate the mass on an atomic or molecular scale.

Symbol:

amu

Plural:

atomic mass units

Also known as:

dalton (plural: daltons, symbol: Da)