Torque Converter – Convert N·m, lb·ft & kgf·m
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
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
Step 1
Enter the value you want to convert
- 2
Step 2
Select the source unit you are converting from
- 3
Step 3
Select the target unit you want as the result
- 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
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Small fasteners: divide lb·in by 8.85 for N·m
- 3
Wrench scale: convert once, tape the chart to the box
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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?
Is lb·ft the same as ft·lb?
Which units does this torque unit converter cover?
How do I use the torque unit converter?
Is the torque unit conversion accurate?
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