Convert kilowatt-hours to BTU

1 kWh=3,412.14BTU

Use the converter below to change any kilowatt-hours value into BTU instantly — with formula, conversion table, and real-world examples.

You have

Equals

3,412.14

Conversion formula

Forward

BTU = kilowatt-hours × 3,412.14

Reverse

kilowatt-hours = BTU × 0.0002931

Example: 10 kWh × 3,412.14 = 34,121.42 BTU.

About both units

From

Kilowatt-Hour

kWh

The kilowatt-hour equals 3.6 megajoules — energy delivered by 1 kW for 1 hour. It is the standard unit on electricity bills worldwide. A UK home uses about 2900 kWh/year; an EV charge adds 10–80 kWh depending on battery.

Real-world: UK home: ~2900 kWh/year. Tesla Model 3 battery: 60–80 kWh. Typical EV efficiency: 15–20 kWh/100 km.

Read full kilowatt-hour reference →

British Thermal Unit

BTU

The British Thermal Unit equals approximately 1055 joules — the energy to raise 1 pound of water by 1 °F. Used for HVAC, heating, and air-conditioning capacity in the US. A 9000 BTU/h AC is a small room unit.

Real-world: Window AC: 5000–12,000 BTU/h. Central AC: 24,000–60,000 BTU/h. Home furnace: 60,000–100,000 BTU/h.

Read full british thermal unit reference →

Kilowatt-Hour to British Thermal Unit conversion table

Common kilowatt-hours to BTU values for quick reference.

Kilowatt-Hour (kWh)	British Thermal Unit (BTU)
1 kWh	3,412.14 BTU
10 kWh	34,121.42 BTU
100 kWh	341,214.16 BTU
500 kWh	1,706,070.82 BTU
1,000 kWh	3,412,141.64 BTU
5,000 kWh	17,060,708.21 BTU
10,000 kWh	34,121,416.42 BTU
50,000 kWh	170,607,082.08 BTU
100,000 kWh	341,214,164.16 BTU
500,000 kWh	1,706,070,820.8 BTU

Tips & common mistakes

Quick tips

1 kWh = 3.6 MJ = 3,600,000 J.
Multiply device power (kW) × time (h) = energy (kWh).
EV "range anxiety" translates to knowing kWh available.

Avoid these

Confusing kWh (energy) with kW (power).
Calculating electric costs by power ignoring duration.
Using "kWh/h" — redundant; it's just kW.

Frequently asked questions

How many BTU in a kilowatt-hour?

One kilowatt-hour equals 3,412.14 BTU.

How do I convert kilowatt-hours to BTU?

Multiply the kilowatt-hour value by 3,412.14 to get the equivalent in BTU.

What is 100 kilowatt-hours in BTU?

100 kilowatt-hours equals 341,214.16 BTU.

Is a kilowatt-hour bigger than a british thermal unit?

Yes. 1 kilowatt-hour equals 3,412.14 BTU, so one kilowatt-hour is larger.

How to convert kilowatt-hours to BTU without a calculator?

Multiply by 3,412.14 for a quick estimate; use a calculator for precise results.

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