Watt-Seconds to British Thermal Units Converter

Enter the energy in watt-seconds below to get the value converted to british thermal units.


Result in British Thermal Units:

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1 Ws = 0.000948 BTU

Do you want to convert british thermal units to watt-seconds?

How to Convert Watt-Seconds to British Thermal Units

To convert a measurement in watt-seconds to a measurement in british thermal units, multiply the energy by the following conversion ratio: 0.000948 british thermal units/watt-second.

Since one watt-second is equal to 0.000948 british thermal units, you can use this simple formula to convert:

british thermal units = watt-seconds × 0.000948

The energy in british thermal units is equal to the energy in watt-seconds multiplied by 0.000948.

For example, here's how to convert 5,000 watt-seconds to british thermal units using the formula above.
british thermal units = (5,000 Ws × 0.000948) = 4.739086 BTU

Watt-seconds and british thermal units are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Watt-Second?

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as Ws, although the formally adopted expression is W·s. The abbreviation W s is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-seconds.

What Is a British Thermal Unit?

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.

Learn more about british thermal units.

Watt-Second to British Thermal Unit Conversion Table

Table showing various watt-second measurements converted to british thermal units.
Watt-seconds British Thermal Units
1 Ws 0.000948 BTU
2 Ws 0.001896 BTU
3 Ws 0.002843 BTU
4 Ws 0.003791 BTU
5 Ws 0.004739 BTU
6 Ws 0.005687 BTU
7 Ws 0.006635 BTU
8 Ws 0.007583 BTU
9 Ws 0.00853 BTU
10 Ws 0.009478 BTU
20 Ws 0.018956 BTU
30 Ws 0.028435 BTU
40 Ws 0.037913 BTU
50 Ws 0.047391 BTU
60 Ws 0.056869 BTU
70 Ws 0.066347 BTU
80 Ws 0.075825 BTU
90 Ws 0.085304 BTU
100 Ws 0.094782 BTU
200 Ws 0.189563 BTU
300 Ws 0.284345 BTU
400 Ws 0.379127 BTU
500 Ws 0.473909 BTU
600 Ws 0.56869 BTU
700 Ws 0.663472 BTU
800 Ws 0.758254 BTU
900 Ws 0.853035 BTU
1,000 Ws 0.947817 BTU
2,000 Ws 1.8956 BTU
3,000 Ws 2.8435 BTU
4,000 Ws 3.7913 BTU
5,000 Ws 4.7391 BTU
6,000 Ws 5.6869 BTU
7,000 Ws 6.6347 BTU
8,000 Ws 7.5825 BTU
9,000 Ws 8.5304 BTU
10,000 Ws 9.4782 BTU


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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