Energy & Power

Watts to BTU per Hour

Convert watts to btu per hour instantly. 1 W = 3.4121416331 BTU/h. Includes the exact factor, a conversion table of common values and the definition of both units.

W
BTU per Hour
—
One step, one exact factorWattswhat you have× 3.4121416331BTU per Hourwhat you getBoth units are defined against the same base unit, so the factor is exact — never an approximation.

How to convert watts to btu per hour

To convert watts to btu per hour, multiply by 3.4121416331. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.

BTU/h = W × 3.4121416331

Watts to BTU per Hour conversion table

The values people look up most often, rounded for reading. Use the calculator above for anything in between.

WattsBTU per Hour
1 W3.412142 BTU/h
2 W6.824283 BTU/h
3 W10.236425 BTU/h
5 W17.060708 BTU/h
10 W34.121416 BTU/h
20 W68.242833 BTU/h
25 W85.303541 BTU/h
50 W170.607082 BTU/h
100 W341.214163 BTU/h
500 W1,706.07 BTU/h
1,000 W3,412.14 BTU/h

What is a watt?

The SI unit of power: one joule per second.

What is a btu per hour?

The rating unit for air conditioners and boilers in the US.

The formula

BTU/h = W × 3.4121416331

Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.

How to use the Watts to BTU per Hour

  1. Type the number of watts you want to convert.
  2. Read the result in btu per hour straight away — there is no button to press.
  3. Check the table below for the values that come up most often, or reverse the conversion with the linked btu per hour to watts page.

Watts to BTU per Hour — frequently asked questions

How many btu per hour are in a watt?

One watt equals 3.4121416331 BTU/h. BTU/h = W × 3.4121416331

What is the formula to convert watts to btu per hour?

The formula is BTU/h = W × 3.4121416331. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.

How do I convert btu per hour back to watts?

Divide instead of multiplying: one btu per hour is 0.2930710702 W. The reverse converter is linked in the related tools list.

Is this conversion exact?

Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.

Is this watts to btu per hour free to use?

Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.

What people search for

This page answers each of these searches. They are the exact phrases visitors use to find the watts to btu per hour.

  • watts to btu per hour
  • 1 watt to btu per hour
  • how many btu per hour in a watt
  • w2btu/h
  • watts in btu per hour
  • watts to btu per hour converter
  • convert watts to btu per hour

About this calculator

Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.

Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error