Single Conversion
Batch Conversion
Tip: Non‑numeric tokens are ignored. Scientific notation supported (e.g., 1.2e3).
Example Data (inch‑pounds → newton‑meters)
| inch‑pounds (lbf·in) | newton‑meters (N·m) |
|---|---|
| 10 | — |
| 15 | — |
| 25 | — |
| 50 | — |
| 75 | — |
| 100 | — |
Results
| # | Input | Input Unit | Output | Output Unit |
|---|
Formula Used
Torque conversion is linear. Using standard gravity and SI definitions:
- 1 pound‑force (lbf) = 4.4482216152605 N
- 1 inch = 0.0254 m
- Therefore, 1 lbf·in = 4.4482216152605 × 0.0254 = 0.1129848290276167 N·m
Forward: N·m = (lbf·in) × 0.1129848290276167
Reverse: lbf·in = (N·m) ÷ 0.1129848290276167
Note: Values are independent of location since pound‑force uses standard gravity by definition. Rounding can be controlled via decimal places or significant figures.
How to Use This Calculator
- Enter a torque value and choose the source and destination units.
- Select a rounding mode: none, decimals, or significant figures.
- Click Convert to see the result and add it to the results table.
- For multiple values, paste a list in the batch area and click Add to Results.
- Use the export buttons to download the results table as CSV or PDF.
FAQs
1 lbf·in equals 0.1129848290276167 N·m, derived from 1 lbf = 4.4482216152605 N and 1 inch = 0.0254 m.
Yes, for torque these notations refer to the same unit: pound‑force times inches (lbf·in). Avoid confusing with pound‑inches as energy (rare) or pound‑mass.
No. Pound‑force is defined using standard gravity (9.80665 m/s²). The conversion factor is constant by definition, not by measurement.
Engineering prints vary, but 2–3 decimals are common for small fasteners. Use significant figures to preserve relative precision when values span orders of magnitude.
Yes. Choose the source in “From unit” and the destination in “To unit” to convert either inch‑pounds → newton‑meters or newton‑meters → inch‑pounds.