Calculator
Enter one torque value, choose a direction, then optionally generate a conversion table and exportable summary.
Example data table
These common sample values help you sanity-check your results before using the calculator for actual torque work.
| Inch-lbs | N·m | ft-lb | Typical context |
|---|---|---|---|
| 5 | 0.565 | 0.417 | Small electronics or light fasteners |
| 25 | 2.825 | 2.083 | Bike clamp and accessory hardware |
| 50 | 5.649 | 4.167 | General workshop tightening tasks |
| 100 | 11.298 | 8.333 | Motorcycle and tool setup points |
| 250 | 28.246 | 20.833 | Heavier mechanical fastening jobs |
Formula used
Primary formula: 1 in-lb = 0.112984829 N·m
Forward conversion: N·m = in-lb × 0.112984829
Reverse conversion: in-lb = N·m × 8.8507457676
Helpful relationships: ft-lb = in-lb ÷ 12, and N·cm = N·m × 100.
The calculator uses these exact factors for the main conversion, then derives the supporting units from the same normalized torque value.
How to use this calculator
- Choose whether you want to convert from inch-lbs to N·m or from N·m back to inch-lbs.
- Enter the torque value you want to convert.
- Select the number of decimal places you want in the results.
- Optionally add a start, end, and step to create a conversion range table and graph.
- Press Convert Now to show the result directly below the header and above the form.
- Use the export buttons to save the current summary and range table as CSV or PDF.
FAQs
1) What is the exact inch-lbs to N·m conversion factor?
Use 0.112984829. Multiply inch-pounds by that factor to get newton-meters. The calculator also applies the reverse factor when you convert N·m back to inch-lbs.
2) Can this page convert N·m back to inch-lbs too?
Yes. Switch the conversion mode to N·m to inch-lbs. The same page recalculates the result, range table, related units, and chart automatically after submission.
3) Why does the calculator also show ft-lb and N·cm?
Torque specs often appear in several units. Showing ft-lb and N·cm lets you compare service manuals, tool settings, and product sheets without opening extra converters.
4) Are the results accurate enough for workshop use?
The math is precise for unit conversion. Real tightening accuracy still depends on the torque wrench, calibration condition, temperature, and whether the manufacturer specifies dry or lubricated threads.
5) Can I enter negative torque values?
Yes. Negative values can represent direction or reverse loading in analysis. The converter keeps the sign, so the relationship stays mathematically consistent across all displayed units.
6) What is the benefit of the range table?
A range table helps when you need several nearby conversions at once. It is useful for comparing wrench settings, checking tolerances, or preparing inspection and assembly sheets.
7) How many decimal places should I choose?
Use fewer decimals for quick field checks and more decimals for engineering documents, tolerance work, calibration sheets, or when your torque specification includes tight acceptance limits.
8) Should I rely only on converted values for final tightening?
No. Always confirm the original manufacturer torque specification, fastener condition, tool range, and sequence pattern. Conversion is only one part of a safe and repeatable tightening process.