Free Torque Converter — Nm, ft-lbs, in-lbs, kgf-cm & More

Convert Torque

Enter a torque value and select the source unit. All conversions are calculated instantly.

Common Torque Specifications

Click any row to load the value into the converter above. These are typical ranges; always check your specific manufacturer's manual.

Conversion Factor Reference

Multiply the row unit by the column factor to convert. For example, 1 Nm = 0.7376 ft-lbs.

How Torque Conversion Works

Torque is a measure of rotational force. It is defined as the product of force and the perpendicular distance from the axis of rotation to the line of action of the force:

Torque = Force x Distance

The SI unit is the Newton-meter (Nm), where one Newton of force applied at one meter from the pivot produces 1 Nm of torque. Other units combine different force units (pounds-force, kilograms-force, dynes, ounces-force) with distance units (feet, inches, centimeters, meters).

Converting between torque units simply requires multiplying by the appropriate ratio of force and distance conversion factors. For example, since 1 foot = 0.3048 meters and 1 pound-force = 4.44822 Newtons:

1 ft-lb = 4.44822 N x 0.3048 m = 1.35582 Nm

Common Conversion Formulas

Understanding Torque

Torque, also called moment of force, describes how much a force acting on an object causes that object to rotate. It is a vector quantity, meaning it has both magnitude and direction. The concept is fundamental to physics, mechanical engineering, automotive work, and everyday tasks like tightening a bolt.

Where Torque Matters

• Automotive: Engine output, wheel lug nuts, spark plugs, brake components, and suspension fasteners all have specific torque specifications. Under- or over-tightening can cause failure.
• Bicycle maintenance: Carbon fiber components are particularly sensitive to torque. Stem bolts, seat post clamps, and handlebar bolts all require precise tightening to avoid cracking or loosening.
• Construction and industrial: Structural bolts, flanges, and pipe fittings require specified torque values to maintain joint integrity under load.
• Electronics: Small fasteners in electronics and precision instruments use inch-pounds or ounce-force-inches to avoid damage to delicate components.
• Aerospace: Every fastener on an aircraft has a specified torque value, with tolerances measured to a fraction of a Newton-meter to ensure structural safety.

Torque vs. Horsepower

Torque and horsepower are related but measure different things. Torque is the rotational force at any given moment, while horsepower is a measure of the rate at which work is performed. They are connected by the formula:

HP = (Torque in ft-lbs x RPM) / 5,252

This means torque and horsepower always cross at exactly 5,252 RPM when measured in ft-lbs. In practical terms, torque determines pulling power and acceleration from a stop, while horsepower determines top-end speed and sustained performance.

Using a Torque Wrench

A torque wrench is a calibrated tool that allows you to apply a specific amount of torque to a fastener. There are several types:

• Click-type: Makes an audible click when the set torque is reached. Most common for automotive work.
• Beam-type: Uses a calibrated beam and pointer to indicate applied torque in real time. Simple and reliable.
• Digital: Displays torque on a screen and often beeps at the target value. Highest precision.
• Dial-type: Features a dial gauge. Common in industrial settings and quality control.

Frequently Asked Questions

What is torque?

Torque is a measure of rotational force applied to an object around an axis. It equals force multiplied by the distance from the axis of rotation (lever arm). The SI unit is the Newton-meter (Nm). Torque determines how effectively a force can cause rotation, which is why it is critical in engines, fasteners, and mechanical systems.

How do I convert Nm to ft-lbs?

To convert Newton-meters to foot-pounds, multiply the Nm value by 0.737562. For example, 100 Nm equals approximately 73.76 ft-lbs. Conversely, to convert ft-lbs to Nm, multiply by 1.35582.

What is the difference between torque and horsepower?

Torque measures rotational force at an instant, while horsepower measures the rate at which work is done over time. They are related by the formula: HP = (Torque in ft-lbs x RPM) / 5,252. Torque determines how much force an engine can exert, while horsepower determines how fast the engine can sustain that force.

Why are torque specifications important for fasteners?

Torque specifications ensure fasteners are tightened to the correct clamping force. Under-torquing can cause bolts to loosen and components to fail, while over-torquing can strip threads, crack parts, or cause bolt fatigue. Always use a calibrated torque wrench and follow manufacturer specifications.

What torque unit is most commonly used?

Newton-meters (Nm) are the SI standard and most widely used internationally. In the United States, foot-pounds (ft-lbs) are more common in automotive and construction contexts. Inch-pounds (in-lbs) are used for smaller fasteners and electronics. The choice depends on the region and application.

How do I use a torque wrench correctly?

Set the torque wrench to the specified value, attach the correct socket, and apply smooth steady force until the wrench clicks or signals the target torque. Always pull at the handle end, never use extensions unless specified, and store the wrench at its lowest setting to preserve calibration.

Does this converter store my data?

No. All calculations run entirely in your browser. No data is sent to any server, and nothing is stored.

Privacy

This converter runs entirely in your browser. No torque values or inputs are transmitted or stored anywhere. All calculations happen client-side using plain JavaScript.

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Torque Converter FAQ