Reference: Units of Measurement

These are all canon, from Transformers Animated continuity specifically. Source is The Allspark Almanac.

Nanoklik: a unit of time, defined as the duration of 8,589,934,592 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. About a second.
Cycle: a unit of time equal to 100 nanokliks. About 1.5 minutes.
Megacycle: a unit of time equal to 100 cycles. About 2.6 hours.
Solar cycle: a unit of time equal to 10 megacycles. About a day.
Deca-cycle: a unit of time equal to 10 solar cycles.
Orbital cycle: a unit of time equal to 32 solar cycles. About a month.
Stellar cycle: a unit of time equal to 320 solar cycles. About a year.

Mechanometer: a unit of distance, defined as the distance traveled by light in a vacuum in 1 / 268,435,456 of a nanoklik. About 1 meter.
Hic: a unit of distance equal to 1024 mechanometers. About 1 kilometer.
Standard unit: a unit of mass equal to about a kilogram.
Kilounit: a unit of mass equal to 454 standard units.