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Convert newton-meters (Nm) to inch-pounds (in-lb) instantly
Inch-Pounds = Newton-Meters × 8.85075
1 Nm = 8.85075 in-lb
| Newton-Meters (Nm) | Inch-Pounds (in-lb) |
|---|---|
| 0.5 | 4.43 |
| 1 | 8.85 |
| 2 | 17.7 |
| 3 | 26.55 |
| 5 | 44.25 |
| 10 | 88.51 |
| 15 | 132.76 |
| 20 | 177.01 |
| 25 | 221.27 |
| 30 | 265.52 |
| 40 | 354.03 |
| 50 | 442.54 |
Inch-pounds (in-lb) are used for small fasteners and delicate applications where foot-pounds would be too large a unit for practical measurement. This unit is essential when working with electronics, small engines, precision instruments, and any application requiring torque values less than about 15-20 ft-lb (approximately 20-27 Nm).
One newton-meter equals 8.85075 inch-pounds. This is because one meter equals 39.37 inches, and one newton equals 0.2248 pounds-force. When you multiply these relationships together, you get the conversion factor. Understanding this helps you visualize that newton-meters are smaller units than inch-pounds, requiring more inch-pounds to equal the same torque.
Inch-pound torque specifications are common in:
For inch-pound applications, torque screwdrivers are often more appropriate than torque wrenches. Torque screwdrivers typically range from 10 to 200 in-lb, while torque wrenches usually start at higher values. Torque screwdrivers provide better control and precision for delicate work where over-torquing could easily damage components or strip threads.
When working with small torque values, precision becomes even more critical. A few inch-pounds can mean the difference between a secure fastener and a stripped thread. Many precision torque tools have accuracy ratings of ±4% or better, and some applications may require even tighter tolerances. Always use calibrated tools and verify specifications carefully.
To convert newton-meters to inch-pounds, multiply by 8.85075. Most scope rings require 15-25 in-lb, which equals approximately 1.7-2.8 Nm. Using proper torque prevents damage to the scope tube while ensuring the scope doesn't shift under recoil. Always apply torque in a cross pattern for even pressure.
It's not recommended. Most foot-pound torque wrenches aren't accurate at low values and lack the precision needed for small fasteners. A 10 in-lb specification equals only 0.83 ft-lb, which is below the accurate range of most ft-lb wrenches. Use a dedicated inch-pound torque screwdriver or wrench for these applications.
Electronics fasteners are typically very small (M2, M3 screws) with fine threads in plastic, soft metal, or circuit boards. These materials strip easily, and the small screw diameter means threads have limited strength. Typical electronics fasteners require only 3-8 in-lb (0.3-0.9 Nm), and hand-tightening with a torque-limiting screwdriver prevents damage.
For most applications, being within ±10% of the specified torque is acceptable. However, critical applications like firearms, aerospace components, or medical devices may require ±4% or better accuracy. Always use a properly calibrated torque tool rated for the range you're working in. Never estimate or guess at torque values for precision applications.