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BTU/hr to Watts Converter

Convert btu per hour to watt instantly. 1 BTU/hr = 0.29307107 W, worked steps and a full reference table.

Formula
W = BTU/hr × 0.29307107

How to use it

  • Type the value in btu per hour — the result updates as you type.
  • Use Swap to flip the direction, or change either dropdown to convert between any two units.
  • Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.

Examples

1 BTU/hr0.29307107 W
5 BTU/hr1.46535535 W
10 BTU/hr2.9307107 W
100 BTU/hr29.307107 W

One btu per hour equals 0.29307107 watts (W). To convert btu per hours to watts, multiply by 0.29307107; to go back the other way, multiply by 3.4121416 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What btu per hours and watts actually measure

BTU per hour (BTU/hr) — BTU per hour measures heat flow — one British thermal unit each hour. Air conditioning, heating and boiler ratings.

Watt (W) — The watt is the SI unit of power — one joule per second. Light bulbs, appliances, audio equipment and solar panels.

BTU/hr to Watts conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

BTU/hrW
1 BTU/hr0.29307107 W
2 BTU/hr0.58614214 W
5 BTU/hr1.4653553 W
10 BTU/hr2.9307107 W
25 BTU/hr7.3267767 W
50 BTU/hr14.653553 W
100 BTU/hr29.307107 W

How to convert btu per hours to watts by hand

Multiply the number of btu per hours by 0.29307107.

For example, 25 BTU/hr × 0.29307107 = 7.3267767 W.

Going the other way, divide by 0.29307107 — or multiply by 3.4121416, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.

Questions people ask

How many W are in 1 BTU/hr?

1 BTU/hr equals exactly 0.29307107 W. Multiply any value in btu per hour by 0.29307107 to get watt.

Is anything uploaded to a server?

No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.

Runs entirely in your browser. Nothing you type is uploaded, logged or shared.

Last updated 18 August 2026