BTU to kWh converter

One kilowatt-hour is 3,412.14 BTU. This converts energy either way — and because an appliance's BTU/h rating converts to kW with the same factor, it works for heater and AC sizing too.

Kilowatt-hours

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Kilowatt-hours—
Megajoules—
Therms—
Kilocalories—
BTU—

BTU to kilowatt-hours

BTUKilowatt-hours
1 BTU0.00029307 kWh
100 BTU0.029307 kWh
500 BTU0.146536 kWh
1,000 BTU0.293071 kWh
3,412 BTU0.999958 kWh
5,000 BTU1.4654 kWh
8,000 BTU2.3446 kWh
10,000 BTU2.9307 kWh
12,000 BTU3.5169 kWh
15,000 BTU4.3961 kWh
18,000 BTU5.2753 kWh
24,000 BTU7.0337 kWh
30,000 BTU8.7921 kWh
36,000 BTU10.5506 kWh
50,000 BTU14.6536 kWh
100,000 BTU29.3071 kWh
1,000,000 BTU293.0711 kWh

Kilowatt-hours to BTU

Kilowatt-hoursBTU
0.1 kWh341.2142 BTU
0.5 kWh1,706.07 BTU
1 kWh3,412.14 BTU
1.5 kWh5,118.21 BTU
2 kWh6,824.28 BTU
3 kWh10,236.42 BTU
3.5 kWh11,942.5 BTU
5 kWh17,060.71 BTU
7 kWh23,884.99 BTU
10 kWh34,121.42 BTU
15 kWh51,182.12 BTU
20 kWh68,242.83 BTU
25 kWh85,303.54 BTU
30 kWh102,364 BTU
50 kWh170,607 BTU
100 kWh341,214 BTU
1,000 kWh3,412,142 BTU

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Length Weight Temperature Volume Area Speed

Heat energy in two systems

A British thermal unit is the energy to warm one pound of water by one degree Fahrenheit; the international-table BTU used on equipment and gas bills is 1,055.05585262 J. A kilowatt-hour is 3,600,000 J. Divide and a kWh is 3,412.14 BTU. A therm, the US gas-billing unit, is 100,000 BTU or 29.3 kWh. Because the hour cancels, the same factor turns an appliance's BTU per hour into kilowatts: a 12,000 BTU/h air conditioner (one “ton” of cooling) is 3.517 kW of cooling output.

kilowatt-hours = BTU × 0.000293071   |   BTU = kilowatt-hours ÷ 0.000293071

Sizing and bills

Room air conditioners: 5,000 BTU/h ≈ 1.5 kW, 8,000 ≈ 2.3 kW, 12,000 ≈ 3.5 kW, 18,000 ≈ 5.3 kW — that is cooling delivered, not electricity drawn, which is lower by the unit's efficiency ratio. A 40,000 BTU/h furnace is 11.7 kW. On a bill, 100 therms of gas is 2,931 kWh of heat energy. The BTU calculator sizes heating and cooling for a room.

Frequently asked questions

How many kilowatt-hours are in 1 BTU?
One BTU is 0.00029307 kilowatt-hours.
What is 10,000 BTU in kilowatt-hours?
10,000 BTU is 2.9307 kilowatt-hours.
How do I convert BTU to kilowatt-hours?
Multiply by 0.000293071. To go back, divide kilowatt-hours by 0.000293071. The calculator does both directions and shows the working under the result.
How many BTU are in 1 kilowatt-hour?
One kilowatt-hour is 3,412.14 BTU.
How many kWh is 12,000 BTU?
12,000 BTU is 3.517 kWh. As a rating, a 12,000 BTU/h air conditioner delivers 3.517 kW of cooling — one 'ton' of refrigeration.

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