The newton-meter (N·m) is the SI unit of torque, measuring the rotational force produced when one newton of force is applied at a one-meter distance from the pivot point. It is the standard unit for engine torque specifications, bolt tightening requirements, and mechanical design worldwide. One newton-meter equals approximately 0.7376 pound-feet.

Ounce-inch (oz·in) is a small imperial torque unit used for precision instruments, watchmaking, and micro-mechanical assembly where even pound-inches would be too large. Small servo motors, camera lens mechanisms, and delicate electronics fasteners are rated in oz·in. One ounce-inch equals approximately 0.00706 newton-meters.