Horsepower Calculator

Calculated using standard mathematical and industry formulas.

Free online Horsepower Calculator calculator and unit conversion tool for everyday, engineering, and home projects.

How to use this calculator?

1. Select mode.
2. Enter stats.
3. Read HP and kW.

Formula & calculation method

Power Formula

HP = Torque × RPM / 5252

Mechanical power.

Step-by-step calculation example

350 lb-ft at 5252 RPM = 350 HP.

Key insights to remember

• HP and torque cross at 5,252 RPM.

How to interpret your results?

Horsepower

Engine power output.

Frequently asked questions

How do I use the Horsepower Calculator calculator?

Enter your numerical input and select desired units to get instant accurate results.

How accurate are the conversions?

Conversions use official ISO conversion factors for maximum precision.

Does it convert metric and imperial units?

Yes, seamless conversions between metric (meters, kg) and imperial (feet, lbs) are supported.

Is my data stored?

No, all calculations execute 100% locally in your browser with zero data logging.

Can I use this for DIY or engineering projects?

Yes, it provides reliable estimates for construction, crafting, science, and everyday math.

What if I enter invalid inputs?

The calculator will display a friendly error prompt if non-numeric values are entered.

Related calculators

• Speed Calculator — Calculate speed, distance, or time from the kinematic formula.
• Fuel Cost Calculator — Calculate trip fuel cost, gas mileage (MPG/L/100km), and yearly fuel expense.

See all other calculators · Explore all online calculators