Conversions

BTU to Watts Calculator

Heating and cooling gear is often rated in BTU per hour, while electrical power is in watts. This calculator converts between them.

Your details

BTU/h

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Power
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Power
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Last updated June 30, 2026. Results update automatically as you type.

How it works

Watts = BTU per hour × 0.29307. Kilowatts = watts ÷ 1000. Note: for air conditioners this is the heat moved, not the electricity used — divide by the unit’s efficiency (EER/COP) to get electrical input.

Frequently asked questions

How many watts is 10,000 BTU?

About 2,931 watts (2.93 kW) of heat energy per hour.

Is this the electricity an AC uses?

No — BTU is the cooling/heating output. An efficient AC uses far fewer electrical watts than its BTU rating because it moves heat rather than generating it.

BTU and tons?

12,000 BTU/h equals one ton of cooling, which is about 3.5 kW of heat.

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

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