Conversion tool
Convert foot-pounds to newton-meters instantly
Enter a value, see the result, copy it, and save a PDF snapshot.
Input
Type a value, then press Enter to calculate.
Result
0.000 Nm
Rounded for readability. Use the arrows to increase or decrease the number of shown digits.
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Disclaimer: Use calculations at your own risk. For critical applications, verify results against your governing standards/specifications.
How it works
We use Nm = ft-lb x 1.35581794833.
Exact relationship: 1 ft-lb = 1.35581794833 Nm.
Example: 10 ft-lb = 13.558 Nm.
Notes: Results are rounded in the default view.
Examples
- 10 ft-lb = 13.558 Nm
- 50 ft-lb = 67.791 Nm
- 250 ft-lb = 338.954 Nm
FAQ
What physical quantity do foot-pounds and newton-meters express?
Foot-pounds express torque in customary engineering contexts and are widely used in mechanical assembly and vehicle service work. Newton-meters express torque, meaning rotational moment rather than straight-line force or pressure.
What is the difference between foot-pounds and newton-meters?
Foot-pounds and newton-meters both express torque, but they come from different engineering conventions and are used in different tool, vehicle, and machine ecosystems.
What is the history of the foot-pound?
Foot-pounds grew from customary force-and-distance engineering practice and remain common in U.S. torque specifications.
What is the history of the newton-meter?
The newton-meter follows from SI force and distance units and became the standard torque unit in modern metric engineering work.
Were the foot-pound and newton-meter discovered by a specific person?
Foot-pounds emerged from engineering convention and standardization rather than discovery by one person. The newton-meter is an SI-derived standardized unit rather than a single-person discovery.
Where are foot-pounds and newton-meters used in science and engineering?
Foot-pounds are common in automotive service manuals, fastener charts, wrench settings, and U.S.-oriented machine maintenance. Newton-meters are common in fastener torque specs, motors, shafts, drivetrain work, and international engineering documentation.
Why do torque units matter in calculations?
Torque units affect wrench settings, fastener integrity, shaft loading, machine setup, and maintenance outcomes. Using the wrong torque unit can cause direct hardware damage or safety risk.
Can I trust this for critical calculations?
Use this for convenience and verify against your governing standard, service manual, or controlled engineering document for critical work. Torque values often tie directly to safety and reliability.
References
- Exact constant used: 1 ft-lb = 1.35581794833 Nm.
- Torque conversions are derived from consistent rotational moment relationships anchored to the newton-meter.