Full name: millimetre/Gregorian year
Plural form: millimetres/year
Symbol: mm/yr
Category type: speed
Scale factor: 3.1688738506811E-11
The SI derived unit for speed is the meter/second.
1 meter/second is equal to 31556952000 millimeters/year.
Valid units must be of the speed type.
You can use this form to select from known units: