British Thermal Units to Watt-seconds Conversion

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

Results in Watt-seconds:
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1 BTU = 1,055.055853 Ws

How to Convert British Thermal Units to Watt-seconds

To convert a british thermal unit measurement to a watt-second measurement, multiply the energy by the conversion ratio.

Since one british thermal unit is equal to 1,055.055853 watt-seconds, you can use this simple formula to convert:

watt-seconds = british thermal units × 1,055.055853

The energy in watt-seconds is equal to the british thermal units multiplied by 1,055.055853.

For example, here's how to convert 5 british thermal units to watt-seconds using the formula above.
5 BTU = (5 × 1,055.055853) = 5,275.279263 Ws

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

British Thermal Units

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.


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]

British Thermal Unit to Watt-second Conversion Table

British thermal unit measurements converted to watt-seconds
British Thermal Units Watt-seconds
0.001 BTU 1.0551 Ws
0.002 BTU 2.1101 Ws
0.003 BTU 3.1652 Ws
0.004 BTU 4.2202 Ws
0.005 BTU 5.2753 Ws
0.006 BTU 6.3303 Ws
0.007 BTU 7.3854 Ws
0.008 BTU 8.4404 Ws
0.009 BTU 9.4955 Ws
0.01 BTU 10.55 Ws
0.02 BTU 21.1 Ws
0.03 BTU 31.65 Ws
0.04 BTU 42.2 Ws
0.05 BTU 52.75 Ws
0.06 BTU 63.3 Ws
0.07 BTU 73.85 Ws
0.08 BTU 84.4 Ws
0.09 BTU 94.96 Ws
0.1 BTU 105.51 Ws
0.2 BTU 211.01 Ws
0.3 BTU 316.52 Ws
0.4 BTU 422.02 Ws
0.5 BTU 527.53 Ws
0.6 BTU 633.03 Ws
0.7 BTU 738.54 Ws
0.8 BTU 844.04 Ws
0.9 BTU 949.55 Ws
1 BTU 1,055 Ws


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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