How to use   • Type your value into appropriate edit box.
Accuracy - number of significant decimal digits: Bookmark and
Share Displays link url to your conversion. Metric
SystemImperial & US System milligram [mg] ounce [oz] gram [g]
pound [lb] decagram [dag] stone kilogram [kg] US hundredweight
[cwt] metric tonne [T] Imp. hundredweight [cwt] Other short ton
[S/T] carat [ct] long ton [L/T] quintal [q] grain [gr]  Atomic
Mass Unit [u],[amu] or [Da] Planck Mass Examples of different
masses Electron Mass Proton Mass Neutron Mass Carbon C12 
Cullinan Diamond Lunar Mass Earth Mass Jupiter Mass Solar Mass
To see description put the mouse cursor over left side of this
window .  Mass of the Electron  Electron Mass is equal
9.11*10-31kg (0.0005u, 0.511 MeV/c2) and it is approximately
1/1836 of proton mass. Mass of the Proton  Proton Mass is equal
1.6726*10-27kg (1.0073u, 938.272 MeV/c2) an it is approximately
equal to neutron mass and approximately 1836 times greater then
the mass of an electron. Mass of the Neutron  N