Torque Conversion Calculator
Torque Conversion Calculator
Info: Converts torque values between Metric (SI), Imperial, and CGS units.
Report Bug Precision is the difference between a perfectly tuned engine and a broken bolt. The Torque Conversion Calculator is an essential tool for mechanics, engineers, and DIY enthusiasts who work with international equipment. Since torque specifications vary by manufacturer—European cars often use Newton-meters (Nm) while American vehicles favor Pound-feet (lb-ft)—having a reliable conversion tool ensures you apply the exact rotational force required by technical manuals.
In 2026, as electric vehicles (EVs) with high instantaneous torque become the norm, understanding the relationship between different torque units is vital for both performance tuning and safe mechanical assembly in the US and global markets.
🔧 Rotational Force Dynamics
Torque is a vector quantity that measures the "turning effect" of a force. Our calculator uses high-precision constants to bridge the gap between US Customary and Metric systems:
[Image of torque wrench and rotational force]Common Conversions: While lb-ft and Nm are standard for vehicles, smaller electronics and aerospace components may require conversions to Inch-pounds (in-lb) or Newton-centimeters (N-cm).
Standard Torque Values: Automotive & Engineering
Understanding how torque scales across different applications helps in identifying the right tools and settings. Below is a comparison table of common torque benchmarks in both US and International units.
Strategies for Safe Torque Application
Applying the correct converted value is only half the battle. To ensure mechanical integrity in US-based projects, follow these expert guidelines:
- The "Dry vs. Wet" Factor: Torque specifications are usually for "dry" threads. If you lubricate a bolt, the actual clamping force increases significantly, which may lead to snapping even if the torque wrench setting is correct.
- Wrench Calibration: Always use a calibrated torque wrench. If your wrench reads in lb-ft but the manual is in Nm, use our tool to convert first rather than guessing the "click" feel.
- Sequence Matters: Especially for cylinder heads or wheel lugs, apply torque in a "star pattern" or the specific manufacturer's sequence to prevent warping.
Frequently Asked Questions (FAQ)
1. What is the difference between lb-ft and ft-lb?
In the US, lb-ft (Pound-foot) is the correct term for torque (rotational force), while ft-lb (Foot-pound) technically refers to work or energy. However, in automotive culture, they are often used interchangeably.
2. How do I convert Inch-pounds to Foot-pounds?
Since there are 12 inches in a foot, simply divide the inch-pound value by 12. For example, 120 in-lb is equal to 10 lb-ft. This is common for small fasteners like valve cover bolts.
3. Is 1 Nm stronger than 1 lb-ft?
No. 1 lb-ft is approximately 1.35 times stronger than 1 Nm. This means that a torque spec of 100 lb-ft is much "tighter" than a spec of 100 Nm.
4. Why do European manufacturers use Nm?
Newton-meter is the standard SI (International System of Units) unit for torque. Most of the world uses the metric system, while the US remains the primary market for lb-ft measurements.
5. Can over-torquing a bolt be dangerous?
Yes. Over-torquing stretches the bolt beyond its "elastic limit," causing it to weaken or snap. In automotive applications like lug nuts or brake calipers, this can lead to catastrophic failure.
6. Does the length of the wrench affect the conversion?
The conversion between units remains the same regardless of tool length. However, a longer wrench (more leverage) makes it easier for you to apply the same amount of torque to a bolt.
7. What is "Breakaway Torque"?
Breakaway torque is the amount of force required to start a stationary bolt turning. This is usually higher than the "tightening torque" due to friction and potential corrosion.
