Unit converter
Torque.
Convert lbf·ft to N·m, or pick any of the 7 units in the menus. Type in either box and the other follows. Twisting force, in newton metres and pound-feet. It shares its dimensions with energy and is never written in joules.
| lbf·ft | N·m |
|---|---|
| 1 lbf·ft | 1.35582 N·m |
| 2 lbf·ft | 2.71164 N·m |
| 3 lbf·ft | 4.06745 N·m |
| 4 lbf·ft | 5.42327 N·m |
| 5 lbf·ft | 6.77909 N·m |
| 10 lbf·ft | 13.5582 N·m |
| 15 lbf·ft | 20.3373 N·m |
| 20 lbf·ft | 27.1164 N·m |
| 25 lbf·ft | 33.8954 N·m |
| 50 lbf·ft | 67.7909 N·m |
| 75 lbf·ft | 101.686 N·m |
| 100 lbf·ft | 135.582 N·m |
| 250 lbf·ft | 338.954 N·m |
| 500 lbf·ft | 677.909 N·m |
| 1000 lbf·ft | 1355.82 N·m |
- Every unit in the menus is defined against N·m, so any pairing converts by the same single route.
Definitions
- The pound-foot is 1.355 818 N·m. Torque wrenches sold in the UK and US are commonly marked in it.
- The newton metre is the SI unit of torque. It has the same dimensions as the joule but is never written as one — torque is not energy.
- Torque is force multiplied by perpendicular distance. A newton metre has the same dimensions as a joule, but torque and energy are not interchangeable quantities.
- Every unit in the menus is exact by definition, so the only rounding on this page is the one you choose for the display.
How it works
Every value is converted into newton metres and then back out into the unit you asked for. One route covers every pairing in the menus, so an unusual combination is no less accurate than a common one, and adding a unit affects only that unit.
Both boxes are live. Whichever one you last typed in is the source, changing either menu recalculates straight away, and Swap exchanges the units and the values so the number you are reading stays where you are looking.
Display precision sets a maximum number of significant figures and trims trailing zeroes, so it changes what you see and never what was calculated. The editable box always holds a plain number at full working precision, so you can carry on from either side.
Common questions this answers: how many newton metres in a pound-force foot (1.35582), how many pound-force feet in a newton metre (0.737562), and what 100 lbf·ft is in newton metres (135.582 N·m).
- Free
- No ads
- No tracking
- No account
- Works offline once loaded
From the maker of Ans — a scientific calculator you can own. Same idea: a proper instrument, nothing in the way.