Convert Pound-feet to Newton meters
1 pound-foot is 1.36 N·m. One pound-foot is exactly 1.35581794833 newton meters.
One pound-foot is 1.3558179 newton meters. To convert pound-feet to newton meters, multiply by 1.3558179; to go the other way, divide by 1.3558179 or multiply by 0.73756215. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Special Publication 811. The torque of one pound-force at one foot.
Factor checked against the defining standard · How we check
- Pound-feet × 1.3558179
1 * 1.35581791.356 N·m
1 pound-foot in every torque unit
| Unit | Value | Exact factor |
|---|---|---|
| pound-feet (as entered) | 1 lbf·ft | — |
| pound-inches | 12 lbf·in | × 12 |
| newton meters | 1.355817948 N·m | × 1.35581794833 |
| newton centimeters | 135.5817948 N·cm | × 135.581794833 |
| kilogram-force meters | 0.1382549544 kgf·m | × 0.138254954376 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: pound-feet to newton metres is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert pound-feet to newton meters? The converter and the working
- 1.Take the measurement in pound-feet.
- 2.Multiply by 1.3558179 — that is how many newton meters fit in one pound-foot.
- 3.To go back the other way, divide by 1.3558179, or multiply by 0.73756215.
Worked example: 25 pound-feet to newton meters
- Formula
- lbf·ft × 1.3558179 = N·m
- Arithmetic
- 25 × 1.3558179 = 33.9 N·m
- Answer
- 25 lbf·ft = 33.9 N·m
The factor is rounded for display; the figure above is computed from the full value.
Pound-feet to newton meters conversion table
| Pound-feet | Newton meters |
|---|---|
| 1 lbf·ft | 1.36 N·m |
| 2 lbf·ft | 2.71 N·m |
| 3 lbf·ft | 4.07 N·m |
| 4 lbf·ft | 5.42 N·m |
| 5 lbf·ft | 6.78 N·m |
| 6 lbf·ft | 8.13 N·m |
| 7 lbf·ft | 9.49 N·m |
| 8 lbf·ft | 10.85 N·m |
| 9 lbf·ft | 12.2 N·m |
| 10 lbf·ft | 13.56 N·m |
| 12 lbf·ft | 16.27 N·m |
| 15 lbf·ft | 20.34 N·m |
| 20 lbf·ft | 27.12 N·m |
| 25 lbf·ft | 33.9 N·m |
| 50 lbf·ft | 67.79 N·m |
| 100 lbf·ft | 135.58 N·m |
| 200 lbf·ft | 271.16 N·m |
| 300 lbf·ft | 406.75 N·m |
| 500 lbf·ft | 677.91 N·m |
| 1000 lbf·ft | 1,355.82 N·m |
| 2000 lbf·ft | 2,711.64 N·m |
| 5000 lbf·ft | 6,779.09 N·m |
| 10000 lbf·ft | 13,558.18 N·m |
Pound-foot is torque; foot-pound is energy
They have the same dimensions and the same number — 1.3558179 of each per newton-meter or joule — and they are not the same quantity. Torque is a force acting at a distance and does no work until something turns; energy is work already done. Convention writes torque as lbf·ft and energy as ft·lbf, and a torque wrench is calibrated in the first. Confusing them is harmless in arithmetic and wrong in a specification.
NIST Special Publication 811 — Guide for the Use of the International System of Units
What is a pound-foot?
The torque of one pound-force at one foot. Exact, because a pound-force is exactly 4.4482216152605 newtons and a foot is exactly 0.3048 meters. Every US torque wrench is marked in these.
What is a newton meter?
The SI unit: one newton acting at one meter. Every metric service manual states torque in it.
How many newton meters are in a pound-foot?
One pound-foot is 1.3558179 newton meters. Going the other way, one newton meter is 0.73756215 pound-feet. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every torque unit here
The whole group — 5 units with their symbols and the size of each one in newton meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a pound-foot.
Source: NIST Special Publication 811 — pound-force is exactly 4.4482216152605 N
Cite this page
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- Rule Calculator. (2026). Convert Pound-feet to newton meters. Rule Calculator. https://rulecalculators.com/convert/pound-foot-to-newton-meter
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- Chicago
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The date is when the figures on this page were last checked against their source, not the day you opened it. Add your own access date if your style needs one.
Questions people actually ask
- How many newton meters are in a pound-foot?
- 1.3558179. The SI unit: one newton acting at one meter. Every metric service manual states torque in it.
- How do I convert newton meters back to pound-feet?
- Divide by 1.3558179, or multiply by 0.73756215 — they are the same operation.
Other torque conversions
Newton meters to pound-feet — the same conversion the other way.