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Torque Converter – Convert N·m, lb·ft & kgf·m

Quick answer

This calculator converts torque units: 1 lb·ft = 1.3558179 N·m exactly.

  • Free converter with formulas, worked examples and tables for wrenches, engines and fasteners.

Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.

How the Torque Converter Works

1 lb·ft = 1.3558179 N·m exactly

This torque unit converter routes every input through exact definitions — 1 lb·ft = 1.3558179 N·m exactly. Enter a value, pick the source and target units, and the result appears instantly with the factor applied shown beside it. Newton-meters state torque in SI while pound-feet serve American wrenches and engine charts — a force times a lever arm, quoted in two dialects. The bridge is exact: 1 lb·ft = 1.3558179483 N·m, so tightening-spec conversions never add error, only display rounding. A mini table of the head factor makes spot-checks immediate: 1 lb·ft = 1.3558 N·m; 5 lb·ft = 6.7791 N·m; 10 lb·ft = 13.5582 N·m; 50 lb·ft = 67.7909 N·m; 100 lb·ft = 135.5818 N·m. Anchors: a typical wheel bolt asks 110 N·m (81 lb·ft), a compact car engine peaks near 200 N·m (148 lb·ft), and hand-tightening a 30 cm wrench delivers roughly 60 N·m at full push.

  1. 1

    Step 1

    Enter the value you want to convert

  2. 2

    Step 2

    Select the source unit you are converting from

  3. 3

    Step 3

    Select the target unit you want as the result

  4. 4

    Step 4

    Read the exact result, then swap or copy as needed

Use Cases

Tightening wheel bolts and cylinder heads to spec

Comparing engine and motor torque curves across markets

Setting torque wrenches calibrated in the other system

Tips

  • 1

    1 lb·ft = 1.3558 N·m; 100 N·m ≈ 73.8 lb·ft

  • 2

    Small fasteners: divide lb·in by 8.85 for N·m

  • 3

    Wrench scale: convert once, tape the chart to the box

  • 4

    Engine charts: peak torque in N·m ÷ 1.3558 gives lb·ft

Common Mistakes

  • Reading lb·in values as lb·ft — a factor of 12 error on small fasteners

  • Converting only the force (4.448) and forgetting the 0.3048 m lever

  • Quoting kgf·m as if N·m — multiply by 9.80665 first

FAQs

How many N·m is one pound-foot?

Exactly 1.3558179483 N·m. Note the unit is pound-FORCE times feet, not pound-mass — the 4.4482216 N definition of lbf times 0.3048 m builds the constant. On this torque unit converter page the head rule is 1 lb·ft = 1.3558179 N·m exactly.

Is lb·ft the same as ft·lb?

For torque they are used interchangeably, though engineering style prefers lb·ft for torque and reserves ft·lb for work/energy (1 ft·lb = 1.3558 J). Context, not the word order, carries the meaning. On this torque unit converter page the head rule is 1 lb·ft = 1.3558179 N·m exactly.

Which units does this torque unit converter cover?

It converts N·m, lb·ft & kgf·m plus the wider torque unit family — pick any pair after typing your value. Every factor shown is the international definition, e.g. 1 lb·ft = 1.3558179 N·m exactly.

How do I use the torque unit converter?

Type a value, choose the unit you already have, choose the unit you want, and the converted result appears instantly with the exact factor applied.

Is the torque unit conversion accurate?

Yes — each factor is the fixed international definition (1 lb·ft = 1.3558179 N·m exactly), so results are exact up to the decimals displayed. Only rounding for display changes the figure you see.