Foot-pounds to Newton-meters
Convert pound-force feet to newton-meters instantly. Change the amount or check the formula below.
Same torque in four units
N·m≈ 6.77909 N·m
ft·lbf= 5 ft·lbf
in·lbf= 60 in·lbf
kgf·m≈ 0.691275 kgf·m
Torque is a moment of force, not energy. These numbers are unit equivalents, not manufacturer tightening specifications.
1 ft·lbf = 12 in·lbf; 1 kgf·m = 9.80665 N·m. NIST torque definitions.More actions
Multiply ft·lbf by approximately 1.355817948 to get N·m.
Same value in other units View equivalents
| Unit | Equivalent value |
|---|---|
| Pound-force inches (in·lbf) | 60 in·lbf |
| Kilogram-force meters (kgf·m) | 0.691275 kgf·m |
| Newton-meters (N·m) | 6.77909 N·m |
How to convert ft·lbf to N·m
Multiply ft·lbf by approximately 1.355817948 to get N·m.
Enter your value in the converter. The displayed result updates immediately. All math is performed in your browser. You can use the copy function to save a result or share a linked example with a colleague.
Quick reference table
Choose a value below to try it in the live converter.
| Pound-force feet | Newton-meters |
|---|---|
| 1.3558179 N·m | |
| 2.7116359 N·m | |
| 6.7790897 N·m | |
| 13.5581795 N·m | |
| 33.8954487 N·m | |
| 67.7908974 N·m | |
| 135.5817948 N·m |
Results use the torque dimension. Choose compatible units only; the precision selector changes display rounding, not the underlying factor.
Verify ft·lbf to N·m
Using the stated definitions, 1 ft·lbf ≈ 1.355817948 N·m and 10 ft·lbf ≈ 13.558179483 N·m. The live converter accepts your own value; the table provides additional check points.
Conversion method
Multiply ft·lbf by approximately 1.355817948 to get N·m.
Torque is a moment, not a weight
Torque is force multiplied by a perpendicular lever-arm distance. Foot-pound-force (ft·lbf) is commonly written “foot-pounds” but must not be confused with pounds of mass.
Both newton-meters and foot-pound-force represent torque. The calculator changes units only; it cannot determine a recommended tightening torque for a particular part.
Need the other direction? Convert N·m to ft·lbf.
Reference: NIST conversion factors. Calculation and display rounding are separate. See how we calculate.
100 foot-pound-force in other torque units
The source torque is expressed in three additional units without rounding intermediate calculations.
| Source torque | Newton-meters | Inch-pound-force | Kilogram-force meters |
|---|---|---|---|
| 100 ft·lbf | 135.581795 N·m | 1,200 in·lbf | 13.825495 kgf·m |
A foot-pound-force is exactly 12 inch-pound-force. This is torque, not energy or pound mass. Use the manufacturer specification for tightening.
Worked pound-force feet to newton-meters examples
Check these calculated examples, or enter a different number in the live converter. Displayed decimals may be rounded; the calculation uses the underlying unit definition.
| Original value | Converted result |
|---|---|
| 400 ft·lbf | ≈ 542.327179333 N·m |
Practical questions: pound-force feet to newton-meters
What is 400 foot-pound-force in newton-meters?
400 ft·lbf ≈ 542.327179 N·m. The original quantity is torque, measured as a force acting through a lever arm.
Are foot-pound-force and inch-pound-force interchangeable numbers?
No. 1 ft·lbf = 12 in·lbf. For a torque-wrench instruction, always use the specified unit and the manufacturer’s tightening value.
Need another compatible unit? convert newton-meters back to foot-pound-force. Check definitions and rounding.
Specific ft·lbf values
Direct, shareable results for documented search queries.
Methodology: fixed SI definitions and standards-based factors. For safety-critical use, verify the required industry specification. Check definitions, conventions and sources.