The dyne (dyn) is a centimeter-gram-second (CGS) unit of force equal to exactly 0.00001 newtons, used primarily in physics for small-scale force calculations. It represents the force needed to accelerate one gram of mass at one centimeter per second squared, and appears in surface tension and electromagnetic force measurements. One dyne equals exactly 10 micro-newtons.

Ounce-force (ozf) equals approximately 0.278 newtons, the imperial unit for small force measurements in precision engineering, spring calibration, and micro-mechanical testing. It is particularly useful for measuring trigger pull weights, small spring tensions, and delicate instrument calibrations. One ounce-force equals about 1/16 of a pound-force.