마력 계산기

Calculate horsepower from torque and RPM, find torque from HP, or convert between HP, kW, and watts. Free, fast, and easy to use.

믿다

Choose a calculation type, enter your values, and click Calculate Now to get instant results with step-by-step solutions.

전체 사용자 가이드

마력이란 무엇입니까?

Horsepower (HP) is a unit of power that measures the rate at which work is done. It was defined by James Watt to compare steam engines with draft horses. One mechanical horsepower equals 745.7 watts or 0.7457 kilowatts. Horsepower is the standard power rating for car engines, electric motors, and industrial machinery worldwide.

All Formulas at a Glance

HP from Torque: HP = (Torque × RPM) / 5252

Torque from HP: Torque = (HP × 5252) / RPM

RPM from HP: RPM = (HP × 5252) / Torque

전환: 1 HP = 745.7 W = 0.7457 kW

4 Calculation Types

토크 및 RPM의 HP

가장 일반적인 엔진 출력 계산. 토크(ft-lb 또는 N·m)와 RPM을 입력합니다.

HP 및 RPM의 토크

주어진 HP와 RPM에서 엔진이 생성하는 토크의 양을 알아보세요.

HP 및 토크의 RPM

엔진이 주어진 토크에 대해 최대 출력을 생성하는 RPM을 찾습니다.

전력 단위 변환

Convert between horsepower (HP), kilowatts (kW), and watts (W).

이 계산기를 사용하는 방법

  1. Pick a calculation type — HP from torque, torque from HP, RPM from HP, or power conversion.
  2. Enter torque in foot-pounds (ft-lb) or Newton-meters (N·m) as needed.
  3. 모드에 따라 RPM 또는 마력을 입력합니다.
  4. Click Calculate Now and see instant results with step-by-step breakdown and chart.

왜 5252인가?

The constant 5252 comes from unit conversions. One horsepower is 550 ft-lb per second. To go from RPM to radians per minute: (550 × 60) / (2π) ≈ 5252. This means horsepower and torque curves always cross at 5252 RPM when plotted on the same graph.

Key Conversion Factors

• 1HP = 745.7와트 = 0.7457kW

• 1kW = 1.341HP = 1,000와트

• 1ft-lb = 1.3558N·m

• 1N·m = 0.7376ft-lb

Quick Examples

• 5252RPM에서 300ft-lb → (300 × 5252) / 5252 = 300HP

• 6000RPM에서 200HP → (200 × 5252) / 6000 = 175.07ft-lb

• 150HP = 111.86kW = 111,855W

중요 사항

  • 모든 토크 및 전력 값은 0보다 커야 합니다.
  • HP = (Torque × RPM) / 5252 applies only to rotational power in imperial units.
  • Newton-meter inputs are automatically converted to ft-lb for the formula.
  • 이는 기계적(브레이크) 마력 값입니다. 다른 HP 정의도 존재합니다(미터법 HP, 전기 HP).

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