Free Engineering Calculator
Torque Conversion Calculator
1 newton-meter (N·m) = 0.7376 ft-lb = 8.851 in-lb, and 1 ft-lb = 1.356 N·m. Enter a torque below to convert between N·m, ft-lb, in-lb and kgf·m.
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Understanding Proper Joint Tension
Torque is a measure of the rotational force applied to a fastener to create tension in the joint. In engineering, applying the correct amount of torque is vital to ensure that a bolt is stretched enough to act like a spring, clamping components together securely.
Because different industries and regions use different units, such as newton-meters (Nm), foot-pounds (ft-lb) or inch-pounds (in-lb), so converting these values correctly is the only way to avoid under-tightening or over-tightening your hardware.
Common Benchmarks
1 Newton-Meter (Nm): ~0.737 Foot-Pounds.
1 Foot-Pound (ft-lb): exactly 12 Inch-Pounds.
1 Newton-Meter (Nm): ~8.85 Inch-Pounds.
Interactive Torque Conversion Tool
Use the utility below to convert rotational force values for your assembly specifications. Precise torque values are essential for maintaining joint integrity.
Torque Unit Converter
Precision torque conversions for automotive, aerospace, and industrial assembly.
Final Calculated Result
Foot-pounds
Newton-meters
0.00
Foot-pounds (ft-lb)
0.00
Inch-pounds (in-lb)
0.00
Kilogram-meters
0.00
Newton-meters (Scientific Notation)
0.00e+0
*Conversions based on standard industrial torque factors (1 ft-lb ≈ 1.3558 Nm).
Precision rounded to 4 decimal places for engineering accuracy.
How to Use the Torque Conversion Calculator
- Enter the torque value from the drawing, wrench or data sheet.
- Choose the unit you have and the unit you need.
- Read the result and the quick-reference equivalents in all four units.
Torque Conversion Factors and a Worked Example
1 ft-lb = 1.355818 N·m. 1 in-lb = 0.112985 N·m. 1 kgf·m = 9.80665 N·m. 1 N·m = 0.737562 ft-lb = 8.850746 in-lb. There are 12 in-lb in 1 ft-lb.
Example: a metric drawing specifies 52 N·m for an M10 class 8.8 bolt, and the torque wrench reads in ft-lb. 52 x 0.737562 = 38.4 ft-lb, or 460 in-lb.
Reverse example: an inch spec of 75 ft-lb for a 1/2-13 Grade 5 bolt is 75 x 1.355818 = 101.7 N·m.
Key Torque Impacts
| Critical Factor | Industrial Impact | Safety Goal |
|---|---|---|
| Clamping Force | Determines how much pressure is holding the assembly together. | Prevents joint separation. |
| Vibration Resistance | Properly torqued bolts are less likely to loosen under stress. | Ensures long-term stability. |
| Material Fatigue | Over-torquing can stretch a bolt past its elastic limit. | Prevents bolt breakage. |
| Friction Variance | Lubrication and plating change the required torque. | Achieves consistent tension. |
Frequently Asked Questions
How do I convert N·m to ft-lb?
Multiply newton-meters by 0.7376. 100 N·m is 73.8 ft-lb.
How do I convert ft-lb to N·m?
Multiply foot-pounds by 1.3558. 100 ft-lb is 135.6 N·m.
How many in-lb are in a ft-lb?
12. A 10 ft-lb torque is 120 in-lb.
What is kgf·m in N·m?
1 kgf·m (also written kg-m) is 9.80665 N·m. It appears on older European and Japanese specifications.
Next Steps
- Bolt Torque and Preload Calculator: the torque a bolt size and grade needs
- Bolt Torque Chart: torque by size and grade
- Force Conversion Calculator: N, kN, lbf and kgf
- Request a quote for the fasteners in your joint.
Related Calculators
More free tools for the same job:
- Standard Torque and Preload Calculator: Calculate tightening torque and preload for hex and socket head screws.
- Force Converter: Convert force and load between units.
- Pressure Unit Converter: Convert pressure between common industrial units.
- Length Converter: Convert length between inches, millimeters, centimeters, meters and feet.
Need Torque Specifications?
Our engineering experts can provide recommended torque values based on your specific fastener material, grade, and finish.