Newton Meters to Inch Pounds

Convert torque units: Newton Meters (N·m) ↔ Inch Pounds (in·lbs) — precise for mechanics, engineering, and tool applications.

Select conversion direction:

Torque Conversion Formula:

1 N·m = 8.8507457916 in·lbs | 1 in·lbs = 0.112985 N·m

in·lbs = N·m × 8.8507457916 | N·m = in·lbs × 0.112985 (Results: 3 decimal places)

*Derived from: 1 N = 0.737562 lbf; 1 m = 39.3701 in → 1 N·m = 0.737562×39.3701 ≈ 8.8507457916 in·lbs

N·m

International torque standard: engineering, automotive, global manufacturing (SI-derived unit)

in·lbs

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Quick conversions (common torque values) - click to auto-fill:

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About Newton Meters (N·m) and Inch Pounds (in·lbs)

Understanding torque units for engineering, mechanics, automotive, and DIY applications.

Torque Unit Comparison

Unit Symbol Conversion Factor Common Uses
Newton Meter N·m 1 N·m = 8.8507457916 in·lbs Global engineering, automotive manufacturing, power tools, industrial machinery, metric-based DIY
Inch Pound in·lbs 1 in·lbs = 0.112985 N·m US/UK mechanics, legacy equipment, imperial-based tools, small appliance repairs, hardware specifications

Common Torque Conversions (3 decimal places)

Newton Meters (N·m) Inch Pounds (in·lbs) Application
0.5 4.425 Small electronics screws (phone/laptop repairs)
5 44.253 Furniture assembly, light fixture mounting
30 265.522 Car wheel lug nuts (light vehicles)
80 708.060 Engine components, heavy machinery bolts
200 1770.149 Truck/bus wheel nuts, industrial fasteners

Key Note: Inch Pounds vs. Foot Pounds (ft·lbs)

Don’t confuse inch pounds (in·lbs) with foot pounds (ft·lbs) — both are imperial torque units but differ by a factor of 12:

Unit To N·m To in·lbs Typical Use
Inch Pound (in·lbs) × 0.112985 1 (base) Small torque applications (electronics, light hardware)
Foot Pound (ft·lbs) × 1.35582 × 12 Large torque applications (automotive, construction)

Frequently Asked Questions

About torque units and N·m to in·lbs conversions

Why is the conversion factor 8.8507457916 for N·m to in·lbs?

The factor comes from converting the base units of force and distance:

  • 1 Newton (N) = 0.737562 pound-force (lbf) — force unit conversion
  • 1 Meter (m) = 39.3701 inches (in) — distance unit conversion
  • Torque = force × distance → 1 N·m = 0.737562 lbf × 39.3701 in ≈ 8.8507457916 in·lbs
  • Reverse factor: 1 in·lbs = 1 ÷ 8.8507457916 ≈ 0.112985 N·m

Precise factor: 1 N·m = 8.85074579161068 in·lbs

Practical use: Round to 3–6 decimals (sufficient for most engineering applications)

When should I use N·m vs. in·lbs for torque measurements?

The choice depends on region and application type:

  • Newton Meters (N·m): Preferred for global engineering, automotive manufacturing, metric tools, and industrial equipment. Used in Europe, Asia, and most international standards (ISO).
  • Inch Pounds (in·lbs): Common in the US, UK, and countries using imperial units. Ideal for small torque applications (electronics, appliances) and legacy equipment specifications.

Pro tip: Use N·m for torque values above 100 in·lbs (≈11.3 N·m) for readability, and in·lbs for smaller values to avoid decimal N·m.

How does this relate to foot pounds (ft·lbs) for larger torque needs?

Foot pounds are for larger torque, with a simple conversion to in·lbs:

1 ft·lbs = 12 in·lbs (since 1 foot = 12 inches)

1 ft·lbs = 1.35582 N·m

1 N·m = 0.737562 ft·lbs

Practical cross-conversion examples:

  • A 50 ft·lbs torque wrench setting = 600 in·lbs = 67.791 N·m
  • A 20 N·m power tool specification = 177.015 in·lbs = 14.751 ft·lbs
  • A 300 in·lbs fastener torque = 33.895 N·m = 25 ft·lbs

This converter works seamlessly with ft·lbs: first convert ft·lbs to in·lbs (×12), then to N·m, or vice versa.

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