Horsepower Calculator
Horsepower = Torque (lb-ft) × RPM ÷ 5252300×5000÷5252≈285.6 hp
Free online tool
Horsepower Calculator
Enter the torque in lb-ft and engine speed in RPM.
Instant calculation
Horsepower Calculator
Enter the torque in lb-ft and engine speed in RPM.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter torque
Type the torque in pound-feet.
- 02
Enter RPM
Type the engine speed in revolutions per minute.
- 03
See horsepower
Calculate to see the engine power output.
The formula
How this calculation works
Standard automotive formula. 5252 is the constant derived from the definition of horsepower.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
300 lb-ft at 5,000 RPM — horsepower?
300×5000÷5252≈285.6 hp≈ 285.6 horsepowerCommon questions
Questions about this calculation
What is the Horsepower Calculator?
The Horsepower Calculator helps you calculate engine horsepower from torque and RPM. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Standard automotive formula. 5252 is the constant derived from the definition of horsepower.
Can you show an example?
Example: 300 lb-ft at 5,000 RPM — horsepower? — ≈ 285.6 horsepower.
Is my data saved when I use the Horsepower Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Horsepower Calculator free to use?
Yes. The Horsepower Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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