Quick takeaway: 1 Nm ≈ 0.737562 ft-lb. Multiply Newton-meters by 0.7375621493 to convert to foot-pounds. For example, 100 Nm ≈ 73.7562 ft-lb. Enter any torque value above, or choose a conversion from the table to see its result and calculation steps.
How to Use the Nm to ft-lb Converter
Enter the torque value and select its unit. The calculator converts between Nm, ft-lb, in-lb, and kgf-cm and displays results rounded to four decimal places. Choose foot-pounds as the input unit to convert in the other direction.
Torque Conversion Formula
ft-lb = Nm ÷ 1.3558179483314004
For a shorter multiplication factor, use ft-lb ≈ Nm × 0.7375621493.
NIST defines one pound-force as 4.4482216152605 newtons. Multiplying by 0.3048 meters per international foot gives 1.3558179483314004 Nm per ft-lb.
The inverse is Nm = ft-lb × 1.3558179483314004. A setting of 50 ft-lb therefore converts to 67.7909 Nm.
Evidence note: NIST's torque conversion table lists pound-force feet as approximately 1.355818 Nm. This calculator retains more digits during the calculation and rounds only the displayed result. Converting a unit does not establish the correct torque specification for a particular fastener.
Nm to ft-lb Conversion Table
Open a value to load it into the calculator.
| Newton-meters | Foot-pounds | Calculate |
|---|---|---|
| 5 Nm | 3.6878 ft-lb | Convert 5 Nm |
| 10 Nm | 7.3756 ft-lb | Convert 10 Nm |
| 25 Nm | 18.4391 ft-lb | Convert 25 Nm |
| 50 Nm | 36.8781 ft-lb | Convert 50 Nm |
| 100 Nm | 73.7562 ft-lb | Convert 100 Nm |
| 150 Nm | 110.6343 ft-lb | Convert 150 Nm |
Fully Worked Example
Suppose a manufacturer specifies 100 Nm and you need to read that value on a torque wrench marked in ft-lb.
- Identify the input unit as Nm and the output unit as ft-lb.
- Divide by the conversion factor: 100 ÷ 1.3558179483314004 = 73.75621493….
- Round to four decimal places: 100 Nm = 73.7562 ft-lb.
- For a wrench with one decimal place, the corresponding reading is approximately 73.8 ft-lb. Follow the manufacturer’s specification and the wrench’s instructions for the actual setting.
Check 100 Nm in the calculator, or convert 50 ft-lb back to Nm.
Foot-Pounds vs Inch-Pounds
1 ft-lb = 12 in-lb because one foot contains 12 inches. Thus 10 Nm = 7.3756 ft-lb = 88.5075 in-lb. Check the wrench's unit before using the converted value.
For torque, ft-lb and lb-ft are common labels for pound-force feet. The calculator treats either as torque, not a mass measurement.
Common Mistakes
- Mixing up ft-lb and in-lb. Their values differ by a factor of 12.
- Multiplying by 1.3558 when converting Nm to ft-lb. That multiplication converts ft-lb to Nm; use division in the opposite direction.
- Using kg where kgf-cm is required. Kilograms measure mass. Kilogram-force centimeters measure torque.
- Treating extra decimals as wrench precision. The conversion can be precise while the measuring tool has its own resolution and uncertainty.
For other conversions, try kg to lbs, kilos a libras, or mL to fluid ounces.