How the conversion works
1 lbf·ft × 1.35581794833 = 1.35581795 N·m. The quick answer is rounded for readability; use the live calculator below for another value or more precision.
ft·lb to N·m Torque Converter
Convert pound-force feet to newton metres with a quick 1 ft·lb reference and a live torque converter.
Quick reference
1.35581795 N·m
1 lbf·ft → N·m
When this is useful
Use this conversion when a specification, drawing, label or calculation expresses the same physical quantity in lbf·ft and N·m. The live parent converter keeps the source, target and broader equivalent-unit context together.
Quick comparison table
Compare the current answer with nearby or reverse values from the same converter family. Open any row to keep the units preselected and change the number.
| Conversion | Answer | Open |
|---|---|---|
| 1 lbf·ft → N·m | 1.35581795 N·m | Current |
| 1 N·m → lbf·ft | 0.737562149 lbf·ft | View → |
Setting a metric wrench from a ft·lb spec
1 lbf·ft is 1.3558 N·m. US manuals and older parts catalogues list torque in ft·lb, so anyone with a wrench scaled in newton metres has to convert before setting it.
| lbf·ft | N·m |
|---|---|
| 20 | 27.12 |
| 25 | 33.90 |
| 50 | 67.79 |
| 80 | 108.47 |
| 100 | 135.58 |
| 150 | 203.37 |
- An 80 ft·lb spec is 108.47 N·m. A wrench that adjusts in whole newton metres can be set to 108; the ±4% allowed under ISO 6789 for click-type wrenches is ±4.3 N·m at that setting.
- Older Japanese and European manuals use kilogram-force metres: 1 kgf·m is 9.81 N·m or 7.23 lbf·ft, so do not read kgf·m figures as ft·lb.
- A spec in inch-pounds is 12 times smaller than the same number in ft·lb: 100 lbf·in is only 11.30 N·m.
- Dual-scale wrenches print N·m on one side of the scale and ft·lb on the other; set the wrench on the side that matches the spec instead of converting in your head.
Multiply ft·lb by 1.36: 80 × 1.36 = 108.8 N·m, within 0.3% of the exact 108.47.
Convert another value
Editable live calculator
Change any input — the result updates immediately
No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.
Calculated result
1.355818 N·m
Conversion factor: 1 lbf·ft = 1.35581795 N·m
Same value in every supported unit
Newton metre
1.355818 N·m
Kilonewton metre
0.001356 kN·m
Millinewton metre
1,355.817948 mN·m
Pound-force foot
1 lbf·ft
Pound-force inch
12 lbf·in
Ounce-force inch
192 ozf·in
Kilogram-force metre
0.138255 kgf·m
Kilogram-force centimetre
13.825495 kgf·cm
Gram-force centimetre
13,825.495438 gf·cm
Show the working
- 1. Convert 1 lbf·ft to the N·m base: 1 × 1.35581795 = 1.35581795 N·m.
- 2. Convert from N·m to N·m: 1.35581795 ÷ 1 = 1.355818 N·m.
- 3. Direct factor check: 1 × 1.35581795 = 1.355818 N·m.
Torque and energy share the dimension N·m, but they are different physical quantities. Do not relabel torque as joules.
More actions
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A quick note before you use the number
This converts units only; it does not prescribe a fastener tightening torque. Use the manufacturer or engineering specification for the required torque.
Open the full Torque Unit Converter — N·m, lb·ft, lb·in, oz·in & kgf·m