# Torque fractional unit of measure; cN-m or N-cm?

#### dgriffith

##### Quite Involved in Discussions
Quick and dirty question:
Centimeter Newton-meter (cN-m) or Newton-centimeter (N-cm)
N-cm makes the most sense and keeps with the SI but there are torque tool mfr.'s out there that actually use cN-m.
What say you all?

#### Miner

##### Forum Moderator
Centimeter Newton-meter (cN-m) or Newton-centimeter (N-cm)
First off, it is Centinewton meter, not Centimeter newton. The SI unit for torque is N-m. The SI standard only states that you use SI prefixes, but does not state whether to use them on the first or the second unit of a derived measurement. This lack of standardization is why you see it listed differently. I suspect the differences are regional.

#### Ronen E

##### Problem Solver
Moderator
From a practical or scientific perspective they are interchangeable, and equate (each) 0.01N*m.
Whether you apply a force of 1N at the end of a 1cm (=0.01m) arm, or 0.01N at the end of a 1m arm, the resulting torque will be equel: 0.01N*m.

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