Force meter
A force meter is an instrument to measure the magnitude of a force. This is often just a spring contained within a cylinder that has a scale to mark the extension of the spring produced by the force. In the International System of Units, the unit of force is the newton (symbol N). A force meter that measures force in newtons may be referred to as a newtonmeter.
Torque
Torque has dimension force times distance, symbolically . Official SI literature suggests using the unit "newton metre" (N⋅m) or the unit "joule per radian". The unit "newton metre" is properly denoted N⋅m or N m. This avoids ambiguity with mN, millinewtons.