馬力計算機

共有リンク

はじめに

Horsepower Calculator — Convert engine torque and RPM into horsepower. Enter Torque (lb-ft), RPM to get an instant, accurate result.

計算式

Horsepower = torque (lb-ft) × RPM / 5252 — the constant where torque and horsepower curves always cross.

ステップごとの説明

Enter the Torque (lb-ft).
Enter the RPM.
Click Calculate to see your result instantly.

実例

Example: With Torque (lb-ft) = 300, RPM = 5000, the Horsepower Calculator gives a result of 285.6055.

よくある質問

Why 5252 specifically?

It falls out of the unit conversion between torque, angular speed, and horsepower (1 hp = 33,000 ft-lb/min); at 5252 RPM, horsepower and torque numbers are always numerically equal.

Does more torque always mean more horsepower?

No — horsepower depends on both torque and RPM, so a lower-torque engine spinning at much higher RPM can produce more horsepower than a higher-torque, low-revving one.

What inputs does the Horsepower Calculator need?

You'll need to provide: Torque (lb-ft), RPM. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Horsepower Calculator?

The Horsepower Calculator applies the formula exactly as calculated — Horsepower = torque (lb-ft) × RPM / 5252 — the constant where torque and horsepower curves always cross. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Horsepower Calculator free to use?

Yes, the Horsepower Calculator is completely free, requires no signup, and runs instantly in your browser.