About Torque Converter & Power Curve
Convert automotive torque between Pound-Feet (lb-ft), Newton-Meters (N·m), Kilogram-Meters (kg·m), and Inch-Pounds. Includes dynamic engine power curve computation to calculate horsepower and kilowatts at any engine RPM.
Key Capabilities & Features
- High-precision torque conversion across lb-ft, N·m, kg·m, and in-lb
- Dynamic Engine Power Curve solver: calculates HP and kW generated at any given RPM
- Applies the classic automotive relationship: Horsepower = (Torque × RPM) / 5252
- Essential for dyno tuning, drag racing setup, and powertrain benchmarking
How to Use Torque Converter & Power Curve
Input Torque Output
Enter engine or motor peak torque rating.
Select Measurement Unit
Choose between lb-ft, N·m, kg·m, or in-lb.
Specify Engine RPM
Optionally input engine operating RPM (e.g. 4500 RPM).
Review Power & Torque
View converted torque units and instantaneous horsepower generated.
Privacy & In-Browser Execution Guarantee
100% client-side calculation. Your data never leaves your browser.
Frequently Asked Questions
Why do horsepower and torque cross at 5252 RPM?
In imperial units, Horsepower = (Torque in lb-ft × RPM) / 5252. When RPM is exactly 5252, the RPM and 5252 cancel out, meaning Horsepower equals Torque.
How do you convert N·m to lb-ft?
Multiply Newton-meters by 0.73756 to get pound-feet. Conversely, multiply pound-feet by 1.35582 to get Newton-meters.