Calculadora de potência

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

Calcular

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

Guia do usuário completo

O que é potência?

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

Conversões: 1 HP = 745.7 W = 0.7457 kW

4 Calculation Types

HP de Torque e RPM

O cálculo de potência do motor mais comum. Insira o torque (ft-lb ou N·m) e RPM.

Torque de HP e RPM

Descubra quanto torque um motor produz em um determinado HP e RPM.

RPM de HP e Torque

Encontre a rotação na qual um motor produz potência de pico para um determinado torque.

Converter unidades de energia

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

Como usar esta calculadora

  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. Insira RPM ou potência dependendo do modo.
  4. Click Calculate Now and see instant results with step-by-step breakdown and chart.

Por que 5252?

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

• 1 CV = 745,7 Watts = 0,7457 kW

• 1 kW = 1,341 CV = 1.000 Watts

• 1 pé-lb = 1,3558 N·m

• 1 N·m = 0,7376 pés-lb

Quick Examples

• 300 pés-lb a 5.252 RPM → (300 × 5.252) / 5.252 = 300 HP

• 200 HP a 6.000 RPM → (200 × 5.252) / 6.000 = 175,07 pés-lb

• 150 CV = 111,86 kW = 111.855 W

Notas importantes

  • Todos os valores de torque e potência devem ser maiores que zero.
  • HP = (Torque × RPM) / 5252 applies only to rotational power in imperial units.
  • Newton-meter inputs are automatically converted to ft-lb for the formula.
  • Estes são valores de potência mecânica (freio). Existem outras definições de HP (HP métrico, HP elétrico).

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