Full name: millimetre/tropical year
Plural form: millimetres/year
Symbol: mm/yr
Category type: speed
Scale factor: 3.1688765172731E-11
The SI derived unit for speed is the meter/second.
1 meter/second is equal to 31556925445 millimetre/tropical year.
Valid units must be of the speed type.
You can use this form to select from known units: