The Mass of a Deuteron (Deuterium nucleus) is 2.01355345 atomic masses (u).  This constant defines the mass of deuteron, the nucleus of Deuterium.  The mass of Deuteron can be automatically converted to other mass units, such as kilograms (kg) or mass of electrons, via the pull-down menu.

Notes

Deuterium (symbol D or 2H, also known as heavy hydrogen) is one of two stable isotopes of hydrogen. It has a natural abundance in Earth's oceans of about one atom in 6,420 of hydrogen.

This constant, `m_d`, is specified with a standard uncertainty (standard deviation) of: 0.00000015E-27 kg