Torque Converter
Convert mechanical torque across Newton-metres (N·m), Pound-force feet (lbf·ft), Pound-force inches (lbf·in), Kilogram-force metres (kgf·m), and Ounce-force inches.
100 N·m • 73.76 lbf·ft
Standard Mechanical & Fastener Torque Presets
SI standard unit of torque (1 Newton force at 1 metre radius).
Formula: Base SI value = 100 N·m
Rotational Mechanical Power Output at Speed
Complete Torque Conversion Matrix
| Unit Name | Symbol | Converted Value | Actions |
|---|---|---|---|
| Newton-metres | N·m | 100 | |
| Kilonewton-metres | kN·m | 0.1 | |
| Dyne-centimetres | dyn·cm | 1.0000e+9 | |
| Kilogram-force metres | kgf·m | 10.1972 | |
| Kilogram-force centimetres | kgf·cm | 1,019.7162 | |
| Pound-force feet | lbf·ft | 73.7562 | |
| Pound-force inches | lbf·in | 885.0746 | |
| Ounce-force inches | ozf·in | 14,161.1933 |
In-Browser Engineering Torque Conversion Engine
The Torque Converter delivers exact conversion factors for mechanical rotational force across SI Metric (N·m, kN·m, dyn·cm), Metric Mass-Force (kgf·m, kgf·cm), and Imperial/US Customary standards (lbf·ft, lbf·in, ozf·in).
Torque measures the tendency of a force to rotate an object about an axis (Torque = Force × Distance). Because automotive specifications, aerospace manufacturing, and industrial robotics use different regional units, precise mathematical conversion is critical for mechanical safety and bolt tensioning.
The platform uses exact conversion constants (e.g., 1 lbf·ft = 1.3558179483314004 N·m based on standard gravity 9.80665 m/s² and international pound/foot definitions). It also calculates rotational mechanical power output at different RPM speeds.
Core Tool Capabilities
- Exact Engineering Conversion Factors: Employs exact non-rounded conversion factors derived from international standards for standard gravity and avoirdupois units.
- Comprehensive Unit Matrix: Converts across SI Metric (N·m, kN·m, dyn·cm), Metric Mass-Force (kgf·m, kgf·cm), and Imperial/US Customary (lbf·ft, lbf·in, ozf·in).
- Rotational Mechanical Power Estimation: Calculates equivalent rotational mechanical power (Watts, kW, and Horsepower) at 1,000 RPM and 3,000 RPM speeds using P = (τ × RPM) / 9548.8.
- Real-World Torque Presets & Benchmarks: Includes presets for bicycle stem bolts, car lug nuts, spark plugs, high-performance engines, semi-truck diesels, and wind turbines.
- Scientific and Standard Notation: Toggle between standard decimal notation and scientific exponent notation (10ⁿ) for extreme values.
- In-browser Privacy: All calculations execute locally in client memory with zero server telemetry or remote data logging.
Local Browser Privacy
Your files are processed locally on your device. Files are not uploaded, transmitted, or stored on remote servers.
Once the page has loaded, you can disconnect your network connection and continue using this tool offline.
Target Use Cases
- • Automotive Repair & Wheel Service
- • Bicycle Maintenance & Carbon Fiber Components
- • Industrial Robotics & Servo Sizing
Technical Specifications & Platform Limits
1 Newton force applied at 1 metre radius.
Derived from 0.45359237 kg × 0.3048 m × 9.80665 m/s².
Torque produced by 1 kg mass under standard Earth gravity.
Covers SI Metric, Metric Mass-Force, and Imperial US Customary.
Step-by-Step Workflow
Enter Torque Value
Input a numeric torque value or select a mechanical preset (e.g. 120 N·m for car wheel lug nuts).
Select Source and Target Units
Select your input unit (e.g. Newton-metres) and target output unit (e.g. Pound-force feet).
Review Power & Conversion Matrix
Examine the full unit matrix and inspect rotational power output estimates at 1,000 and 3,000 RPM.
Copy Results
Click copy to copy formatted torque values directly to your clipboard.
Practical Real-World Use Cases
Automotive Repair & Wheel Service
Mechanics converting wheel lug nut and cylinder head bolt torque specs from N·m to lbf·ft.
Bicycle Maintenance & Carbon Fiber Components
Cycling technicians setting torque wrenches in N·m or lbf·in for carbon handlebars and seat posts.
Industrial Robotics & Servo Sizing
Automation engineers specifying motor stall torque in ozf·in, lbf·in, or N·m.
Frequently Asked Questions
- What is the difference between foot-pounds (ft·lb) and pound-feet (lbf·ft)?
- In mechanical engineering, 'pound-foot' (lbf·ft) represents torque (rotational force), while 'foot-pound' (ft·lbf) represents work or energy. Though numerically equivalent, using lbf·ft for torque maintains proper physical dimension terminology.
- How is rotational power calculated from torque?
- Rotational power P (in Watts) is calculated by multiplying torque τ (in N·m) by angular velocity ω (in radians per second): P = τ × (2π × RPM / 60) ≈ (τ × RPM) / 9.5488.
- Are conversion factors rounded?
- No. The engine uses full-precision floating point constants derived directly from international standard definitions of the kilogram, meter, foot, pound, and standard gravity.
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