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Gurukrupa Enterprises
Electrical Calculators

HP to kW Calculator

Convert horsepower to kilowatts using the standard 0.7457 kW/HP conversion.

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About this calculator

This calculator converts horsepower (HP) to kilowatts (kW) using the standard mechanical horsepower conversion of 1 HP = 0.7457 kW. It is useful when sizing electrical supply, cables or protection for a motor whose rating is given in horsepower.

Formula

kW = HP × 0.7457
  • HPInput power — mechanical horsepower
  • kWOutput power — kilowatts

Worked Example

Given: A pump motor is rated at 10 HP.

Result: 10 × 0.7457 = 7.457 kW, the mechanical output power of the motor.

How to Use

  1. Enter the power value in horsepower.
  2. Click Calculate to get the equivalent power in kilowatts.
  3. Use Reset to clear the field and start again.

Important Assumptions

  • Uses mechanical horsepower (0.7457 kW per HP).

Common Mistakes

  • Assuming HP directly equals the electrical input power drawn from the mains — actual input power also depends on motor efficiency.

Frequently Asked Questions

Is the kW value from this calculator the electricity bill power?

No. This gives mechanical shaft power. Electrical input power is higher because of motor efficiency losses — use the Motor Power Calculator for that.

What HP-to-kW factor do electricians commonly round to?

Many use 0.75 kW/HP for quick estimates, but 0.7457 is the accurate value.

These calculators are provided for informational and estimation purposes. Results depend on the assumptions and input values used. Always verify critical engineering calculations against applicable standards, manufacturer specifications, site measurements, and qualified professional advice.