Torque Units
Convert between N·m, lb-ft, kgf·m, and other torque measurements.
Automotive & Engineering
Perfect for engine specs, bolt tightening, and mechanical design.
Rotational Force
Accurate conversions for rotational force measurements.
Understanding Torque Conversion
Torque measures rotational force—the tendency of a force to rotate an object around an axis. It's calculated as force multiplied by distance from the pivot point. The SI unit is the newton-meter (N·m), while pound-feet (lb-ft) is common in the US, especially for automotive applications like engine torque and bolt tightening specifications.
One pound-foot equals approximately 1.356 newton-meters. Kilogram-force meters (kgf·m) are used in some engineering contexts, where 1 kgf·m equals 9.807 N·m. Understanding torque conversions is essential for automotive work, mechanical engineering, and any application involving rotational forces like motors, engines, and fasteners.
Common Usage Examples
- Automotive: Engine torque specifications and comparisons
- Mechanical Repair: Bolt tightening torque requirements
- Engineering: Motor and gearbox torque ratings
- Tool Selection: Choosing the right torque wrench
- Performance Tuning: Comparing vehicle power curves
- Industrial Equipment: Machinery torque specifications
Frequently Asked Questions
How do I convert lb-ft to N·m?
Multiply lb-ft by 1.356. For example, 100 lb-ft × 1.356 = 135.6 N·m. This is useful for converting US automotive specs to metric.
What's the difference between torque and power?
Torque is rotational force (N·m), while power is the rate of doing work (watts). Power = Torque × Angular Velocity. High torque at low RPM provides strong acceleration.
Why is torque important for engines?
Torque determines an engine's pulling power and acceleration capability. Higher torque means better low-end power for towing and acceleration from a standstill.
What torque wrench setting should I use?
Always follow manufacturer specifications for bolt tightening. Over-tightening can strip threads or break bolts, while under-tightening can cause loosening and failure. Use this converter to match your wrench units.