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Power Converter

Convert between kW, hp, bhp, W, MW, and BTU/hr — engine specs, solar sizing, and HVAC math in one place. Size solar arrays and compare engine outputs correctly — free, local, no signup.

100% Local Browser Native

How to Use the Power Converter

1. Fill the inputs

Enter watts with from- and to-units.

2. Read the converted power

Check the converted value with formula shown.

3. Swap to verify

Reverse from/to and confirm you land back on the original.

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Frequently Asked Questions

What power units are supported?

Kilowatts (kW), horsepower (hp and bhp), watts (W), megawatts (MW), and BTU per hour (BTU/hr). All conversions are bidirectional.

What is the difference between hp and bhp?

Horsepower (hp) is mechanical power. Brake horsepower (bhp) is the power at the engine's output shaft before drivetrain losses. bhp is slightly lower than hp in most contexts.

When would I need BTU/hr conversion?

BTU/hr is used for HVAC systems, heaters, and cooling units. Converting kW to BTU/hr helps size heating/cooling equipment for rooms and buildings.

Are the conversion factors accurate?

Yes. The converter uses standard SI conversion factors: 1 kW = 1.341 hp, 1 hp = 745.7 W, 1 kW = 3412 BTU/hr.

When using Power Converter, is the conversion done locally?

Yes. All conversions run in your browser. No data is transmitted.

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Last updated October 2026