Calculadora de cavalls de potència

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

Calcula

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

Guia d'usuari completa

Què és la potència?

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

Conversions: 1 HP = 745.7 W = 0.7457 kW

4 Calculation Types

HP de parell i RPM

El càlcul de potència del motor més habitual. Introduïu el parell (ft-lb o N·m) i RPM.

Parell de HP i RPM

Trobeu quant parell produeix un motor a una HP i RPM determinats.

RPM de HP i parell

Trobeu les RPM a les quals un motor produeix potència màxima per a un parell determinat.

Convertir unitats de potència

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

Com utilitzar aquesta 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. Introduïu RPM o cavalls de força segons el mode.
  4. Click Calculate Now and see instant results with step-by-step breakdown and chart.

Per què 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 HP = 745,7 Watts = 0,7457 kW

• 1 kW = 1.341 CV = 1.000 watts

• 1 peu-lb = 1,3558 N·m

• 1 N·m = 0,7376 peus-lb

Quick Examples

• 300 peus-lb a 5252 rpm → (300 × 5252) / 5252 = 300 CV

• 200 CV a 6000 RPM → (200 × 5252) / 6000 = 175,07 peus-lb

• 150 CV = 111,86 kW = 111.855 W

Notes importants

  • Tots els valors de parell i potència han de ser superiors a 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.
  • Aquests són valors de potència mecànica (fre). Hi ha altres definicions d'HP (HP mètrica, HP elèctrica).

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