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To convert from Newton-meter (Nm) to Ounce-inch (ozf-in), use the following formula:
Ounce-inch (ozf-in)
= 11.355818 × 10.005208333271755643× Newton-meter (Nm)
= 141.61192893883987621× Newton-meter (Nm)
With 11.355818 is the ratio between the base units Pound-foot (lbf-ft) and Newton-meter (Nm).
Let's convert 5 Newton-meter (Nm) to Ounce-inch (ozf-in).
Using the formula:
5 × 141.61192893883987621 = 708.05964469419938105
Therefore, 5 Newton-meter (Nm) is equal to 708.05964469419938105 Ounce-inch (ozf-in).
How many newton-meters are in one ounce-inch? One Ounce-inch (ozf-in) contains 0.007061551999845192381 Newton-meters (Nm) — the inverse of the factor above. Multiplying by 141.61192893883987621 takes you from newton-meters to ounce-inches; multiplying by 0.007061551999845192381 brings you back.
Put in words: one newton-meter equals 141.61192893883987621 ounce-inches, so the newton-meter is the larger unit of this pair. Converting between them never changes the amount of torque being measured — only the size of the unit you count it in.
A newton-meter (N·m) is the SI unit of torque — the twisting force that makes something rotate. One newton-meter is produced when a force of one newton acts at a perpendicular distance of one metre from the axis of rotation.
The distance matters as much as the force. Pushing on a spanner with 20 N at 0.5 m from the bolt gives 10 N·m. The same 20 N applied through a spanner twice as long gives 20 N·m — identical effort, double the turning effect. This is why a breaker bar loosens a bolt that a short wrench cannot.
The distance is always measured perpendicular to the line of the force. Pulling at an angle reduces the effective lever arm and therefore the torque.
Both work out to the same base units (kg·m²/s²), but they describe different things and must never be interchanged:
Standards keep them apart deliberately: energy is written in J, torque in N·m.
| Torque | Typical example |
|---|---|
| 5 N·m | bicycle stem bolt |
| 25 N·m | car spark plug |
| 110 N·m | car wheel nut |
| 400 N·m | family car engine peak |
An ounce-inch (ozf·in) is one ounce-force applied at one inch from the axis — the smallest of the common imperial torque units.
Ounce-inches exist because small electric motors produce tiny torques that would be unreadable in pound-feet. A stepper motor rated at 0.35 lbf·ft is far more naturally described as 67 ozf·in, and that is how manufacturers publish it.
If you are choosing a stepper or servo for a 3D printer, CNC machine or robot, the datasheet holding-torque figure will almost certainly be in ozf·in or in N·cm.
| From | To | Multiply by |
|---|---|---|
| ozf·in | N·m | 0.00706155 |
| ozf·in | lbf·in | 0.0625 |
| ozf·in | lbf·ft | 0.00520833 |
Here are some quick reference conversions from Newton-meter (Nm) to Ounce-inch (ozf-in):
| Newton-meters | Ounce-inches |
|---|---|
| 0.000001 Nm | 0.00014161192893883987621 ozf-in |
| 0.001 Nm | 0.14161192893883987621 ozf-in |
| 0.1 Nm | 14.161192893883987621 ozf-in |
| 1 Nm | 141.61192893883987621 ozf-in |
| 2 Nm | 283.22385787767975242 ozf-in |
| 3 Nm | 424.83578681651962863 ozf-in |
| 4 Nm | 566.44771575535950484 ozf-in |
| 5 Nm | 708.05964469419938105 ozf-in |
| 6 Nm | 849.67157363303925726 ozf-in |
| 7 Nm | 991.28350257187913347 ozf-in |
| 8 Nm | 1132.8954315107190097 ozf-in |
| 9 Nm | 1274.5073604495588859 ozf-in |
| 10 Nm | 1416.1192893883987621 ozf-in |
| 20 Nm | 2832.2385787767975242 ozf-in |
| 30 Nm | 4248.3578681651962863 ozf-in |
| 40 Nm | 5664.4771575535950484 ozf-in |
| 50 Nm | 7080.5964469419938105 ozf-in |
| 100 Nm | 14161.192893883987621 ozf-in |
| 1000 Nm | 141611.92893883987621 ozf-in |
| 10000 Nm | 1416119.2893883987621 ozf-in |
For all Torque converters, choose units using the From/To dropdowns above.