About Torque Converter
Torque (also known as rotational force or moment of force) measures the tendency of a force to rotate an object around an axis, pivot, or fulcrum. Just as linear force causes an object to accelerate in straight-line motion, torque causes angular acceleration. In mechanical engineering, automotive performance, and industrial fastener manufacturing, torque is a critical specification for engines, gearboxes, and wheel lug nuts.
Primary Torque Units Explained
- Newton-meter (N·m): The official SI derived unit of torque. Represents the rotational force produced by one newton applied perpendicular to a one-meter moment arm. Standard across automotive and industrial engineering worldwide.
- Foot-pound (ft·lb / lb-ft): The Imperial / US Customary unit of torque, defined as one pound-force applied perpendicular to a one-foot lever arm. Equal to approximately
1.355818 N·m.
- Inch-pound (in·lb): Equal to 1/12th of a foot-pound (
0.112985 N·m). Extensively used for low-torque fasteners like bicycle components, engine valve covers, and electronics.
- Kilogram-force meter (kgf·m): Common in older Japanese and European automotive service manuals. Equal to
9.80665 N·m.
Automotive Torque vs. Horsepower
In vehicle dynamics, horsepower and torque are inextricably linked by rotational engine speed (RPM):
Horsepower = (Torque in lb-ft × RPM) / 5252
Torque is the instantaneous "pulling force" you feel accelerating from a standstill, while horsepower determines how fast work can be performed sustained at high engine speeds.
Frequently Asked Questions (FAQ)
How many foot-pounds is 100 Newton-meters?
100 Newton-meters (N·m) equals approximately 73.756 Foot-pounds (ft·lb). To convert N·m to ft·lb, multiply by 0.737562.
How many Newton-meters is 1 Foot-pound?
1 Foot-pound (ft·lb) equals exactly 1.355818 Newton-meters (N·m).
Why is torque specification important for wheel lug nuts?
Tightening wheel lug nuts to the manufacturer's exact torque specification (typically between 80 to 100 ft·lb or 110 to 135 N·m on passenger vehicles) prevents wheel detachment while avoiding warping brake rotors or shearing wheel studs from over-tightening.
Is this Torque Converter free?
Yes, our Torque Converter is 100% free with unlimited real-time calculations. It functions instantly across smartphones, tablets, and desktop computers.
