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The conversion is not direct, since watts are units of power, while BTU/Hr

represents energy per hour of equipment operation. So, in this case, watts will represent the power dissipation of a product.

1 watt = 3.412141633 BTU/Hr

It works both ways, of course:

1 BTU/Hr = 0.29307107 watts

The above is mathematically correct, but I think how it represents the time value is confusing. I've left it for reference purposes.

A Watt is an instantaneous measure of power. It assumes no unit of time. A Watt-Second on the other hand, is 1 Watt of power for 1 Second, which *is* a unit of energy. 1 Watt-Second is equivalent to 1 Joule. A 60 watt lightbulb turned on for exactly 1 second uses 60 Watt-seconds or 60 joules of energy.

BTU on the other hand, is a measure of energy and time is implicit in the unit. 1 BTU is equivalent to approx 1055 Joules.

1 Watt-Second = ~0.00095 BTU.

A 1000 Watt heater, running for 1 hour(3600 seconds) would consume 1KiloWatt-Hour(KWH) of energy. Or 3,600,000 Joules.

1KiloWatt-Hour = 3412 BTU.

OR

1Watt-Hour = 3.412 BTU

While you could divide both sides by Hours and get a comparison of power wherein 1W = 3.412 BTU/hr. I think comparing energy in the forms of KWHs and BTUs is more useful than the other way around.

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11y ago
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5mo ago

To convert watts to BTU per hour, you can use the following conversion factor: 1 watt is equal to 3.412 BTU per hour. So, to convert from watts to BTU per hour, multiply the watt value by 3.412.

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12y ago

Multiply watts by 3.4121 to get BTU/hour.

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Q: Convert watts to BTU per hour?
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