Radian (Units Package Symbol)

Radian is a dimensionless measure of plane angle.

Rad (Units Package Symbol)

Rad is a unit of absorbed dose of radiation.

Rankine (Units Package Symbol)

Rankine is a unit of temperature.

RegisterTon (Units Package Symbol)

RegisterTon is a unit of volume.

Reyn (Units Package Symbol)

Reyn is a unit of absolute viscosity.

Rhes (Units Package Symbol)

Rhes is a unit of viscosity.

Rod (Units Package Symbol)

Rod is a unit of length.

Roentgen (Units Package Symbol)

Roentgen is a unit of exposure to X or gamma radiation.

Rontgen (Units Package Symbol)

Rontgen is a unit of exposure to X or gamma radiation.

Rood (Units Package Symbol)

Rood is a unit of area.