Torque Converter: ft-lb to N·m
Enter a torque value in foot-pounds (ft-lb) and instantly convert it to newton-meters (N·m).
What this ft lb to nm calculator does
This calculator converts foot-pounds (ft-lb) to newton-meters (N·m), which are both units of torque. Foot-pounds are common in the U.S., while newton-meters are part of the metric SI system and commonly used internationally.
Conversion formula
Example: If a bolt spec is 75 ft-lb, then 75 × 1.3558179483 = 101.686 N·m (rounded).
How to use the calculator
- Type your torque value in ft-lb.
- Choose how many decimal places you want in the result.
- Click Convert to N·m.
- Use Clear to reset the inputs and output.
Common ft-lb to N·m conversions
| ft-lb | N·m |
|---|---|
| 10 | 13.558 |
| 25 | 33.895 |
| 50 | 67.791 |
| 75 | 101.686 |
| 100 | 135.582 |
| 150 | 203.373 |
| 200 | 271.164 |
Why torque unit conversion matters
Using incorrect torque units can lead to under-tightened or over-tightened fasteners. In automotive, cycling, and machinery work, this can cause stripped threads, leaks, or part failure. A quick and accurate conversion helps ensure you apply the correct torque according to the specification.
Tips for accurate torque application
- Always verify whether the manual uses ft-lb or N·m.
- Use a calibrated torque wrench.
- Tighten in the proper sequence when required (e.g., wheel lugs, cylinder heads).
- Apply torque smoothly and avoid sudden jerks.
FAQ
Is ft-lb the same as lb-ft?
In torque contexts, they are commonly used interchangeably. Both refer to the same magnitude of torque.
Can torque be negative?
Yes. Negative values can represent direction (clockwise vs. counterclockwise), depending on your sign convention. The calculator accepts negative numbers for that reason.
How many decimals should I use?
For most practical tasks, 1 to 2 decimals are enough. For engineering calculations, you may use more precision.