Convert British Thermal Units to Kilowatt Hours
Instantly convert British Thermal Units (BTU) to Kilowatt Hours (kWh) with our free online calculator.
Formula: BTU to kWh — multiply by 2.9307e-4
Reference Table
| British Thermal Units (BTU) | Kilowatt Hours (kWh) |
|---|---|
| 1 | 0.000293072 |
| 5 | 0.00146536 |
| 10 | 0.00293072 |
| 25 | 0.00732681 |
| 50 | 0.0146536 |
| 100 | 0.0293072 |
How to Convert British Thermal Units to Kilowatt Hours
Formula
To convert British Thermal Units (BTU) to Kilowatt Hours (kWh): multiply by 2.9307e-4
Step-by-Step
- Start with your value in British Thermal Units (BTU).
- Multiply by 2.9307e-4 to perform the conversion.
- The result is your value expressed in Kilowatt Hours (kWh).
Conversion Factor
1 BTU = 0.000293072 kWh
Reverse Factor
1 kWh = 3412.13 BTU
Worked Example
Convert 25 British Thermal Units to Kilowatt Hours: 25 BTU = 0.00732681 kWh
About British Thermal Unit (BTU)
An imperial unit of heat energy, defined as the amount of heat required to raise one pound of liquid water by 1 °F at standard conditions (≈ 1,055.06 J under the International Table definition adopted by ASHRAE and ASTM). BTUs are the universal working unit in US heating, ventilation, and air-conditioning (HVAC) per ASHRAE Handbook conventions: air-conditioner cooling capacity (12,000 BTU/h = 1 'ton' of cooling = 3.517 kW; a typical residential central AC is 2-5 tons = 24,000-60,000 BTU/h), gas furnace output (40,000-100,000 BTU/h for residential), gas-water-heater input (~30,000-50,000 BTU/h), wood-stove output ratings, and gas-fireplace BTU specs. Natural gas wholesale and retail commerce uses 'MMBTU' (one million BTU) as the standard contractual unit — a Henry Hub natural-gas futures contract is denominated in MMBTU. Natural gas itself has heating content ~1,030 BTU per standard cubic foot (scf). 1 BTU = 1,055.06 J = 0.2520 kcal = 0.000293 kWh.
About Kilowatt Hour (kWh)
The global standard unit of electrical energy billing — exactly one kilowatt of power consumed (or generated) for exactly one hour, equal to 3,600,000 joules (3.6 MJ). The kWh is the universal residential and commercial electricity meter unit per IEC 62052 / ANSI C12.20 metering standards. Reference values: a typical US household consumes ~900 kWh per month (~30 kWh/day), the US national average residential electricity rate is ~$0.16/kWh as of 2025 EIA data, EV battery capacities are quoted in kWh (Tesla Model 3 Long Range 75 kWh, Model S Plaid 95 kWh, Ford F-150 Lightning Extended Range 131 kWh), residential solar systems are sized by expected annual kWh production (a 6 kW rooftop array typically produces 7,000-10,000 kWh/year depending on insolation), EV efficiency runs 0.25-0.35 kWh per mile (3-4 mi/kWh). The wholesale electricity market trades in MWh (megawatt-hours) and the bulk-power grid is balanced in GWh and TWh. 1 kWh = 3.6 MJ = 3,412 BTU = 860 kcal.
Quick Facts
- 1 British Thermal Unit equals 0.000293072 Kilowatt Hours
- 1 Kilowatt Hour equals 3412.13 British Thermal Units
- British Thermal Unit is a unit of energy
- Kilowatt Hour is a unit of energy
- This conversion is commonly used in nutrition, electrical billing, physics, and mechanical engineering
- The British Thermal Unit belongs to the imperial system
- The Kilowatt Hour belongs to the metric system
Common British Thermal Unit to Kilowatt Hour Conversions
| British Thermal Units (BTU) | Kilowatt Hours (kWh) |
|---|---|
| 0.01 | 0.00000293072 |
| 0.1 | 0.0000293072 |
| 0.25 | 0.0000732681 |
| 0.5 | 0.000146536 |
| 1 | 0.000293072 |
| 2 | 0.000586144 |
| 3 | 0.000879217 |
| 5 | 0.00146536 |
| 10 | 0.00293072 |
| 15 | 0.00439608 |
| 20 | 0.00586144 |
| 25 | 0.00732681 |
| 50 | 0.0146536 |
| 75 | 0.0219804 |
| 100 | 0.0293072 |
| 250 | 0.0732681 |
| 500 | 0.146536 |
| 1000 | 0.293072 |
| 5000 | 1.46536 |
| 10000 | 2.93072 |
Understanding British Thermal Units
The British Thermal Unit (symbol: BTU) is a unit of energy. An imperial unit of heat energy, defined as the amount of heat required to raise one pound of liquid water by 1 °F at standard conditions (≈ 1,055.06 J under the International Table definition adopted by ASHRAE and ASTM). BTUs are the universal working unit in US heating, ventilation, and air-conditioning (HVAC) per ASHRAE Handbook conventions: air-conditioner cooling capacity (12,000 BTU/h = 1 'ton' of cooling = 3.517 kW; a typical residential central AC is 2-5 tons = 24,000-60,000 BTU/h), gas furnace output (40,000-100,000 BTU/h for residential), gas-water-heater input (~30,000-50,000 BTU/h), wood-stove output ratings, and gas-fireplace BTU specs. Natural gas wholesale and retail commerce uses 'MMBTU' (one million BTU) as the standard contractual unit — a Henry Hub natural-gas futures contract is denominated in MMBTU. Natural gas itself has heating content ~1,030 BTU per standard cubic foot (scf). 1 BTU = 1,055.06 J = 0.2520 kcal = 0.000293 kWh.
It belongs to the imperial measurement system.
British Thermal Units are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Understanding Kilowatt Hours
The Kilowatt Hour (symbol: kWh) is a unit of energy. The global standard unit of electrical energy billing — exactly one kilowatt of power consumed (or generated) for exactly one hour, equal to 3,600,000 joules (3.6 MJ). The kWh is the universal residential and commercial electricity meter unit per IEC 62052 / ANSI C12.20 metering standards. Reference values: a typical US household consumes ~900 kWh per month (~30 kWh/day), the US national average residential electricity rate is ~$0.16/kWh as of 2025 EIA data, EV battery capacities are quoted in kWh (Tesla Model 3 Long Range 75 kWh, Model S Plaid 95 kWh, Ford F-150 Lightning Extended Range 131 kWh), residential solar systems are sized by expected annual kWh production (a 6 kW rooftop array typically produces 7,000-10,000 kWh/year depending on insolation), EV efficiency runs 0.25-0.35 kWh per mile (3-4 mi/kWh). The wholesale electricity market trades in MWh (megawatt-hours) and the bulk-power grid is balanced in GWh and TWh. 1 kWh = 3.6 MJ = 3,412 BTU = 860 kcal.
It belongs to the metric measurement system.
Kilowatt Hours are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Why Convert British Thermal Units to Kilowatt Hours?
Converting energy between British Thermal Units and Kilowatt Hours is common in physics, nutrition, and engineering. Electricity bills use kilowatt-hours, food labels list calories or kilojoules, and mechanical engineers work with joules and BTUs. Reliable conversion helps professionals and consumers compare energy values across different contexts.
Frequently Asked Questions
How do I convert British Thermal Units to Kilowatt Hours?
An imperial unit of heat energy, defined as the amount of heat required to raise one pound of liquid water by 1 °F at standard conditions (≈ 1,055. To convert British Thermal Units to Kilowatt Hours, multiply by 2.9307e-4. For example, 25 BTU equals 0.00732681 kWh.
How many Kilowatt Hours are in 1 British Thermal Unit?
There are 0.000293072 Kilowatt Hours in 1 British Thermal Unit.
How many British Thermal Units are in 1 Kilowatt Hour?
There are 3412.13 British Thermal Units in 1 Kilowatt Hour.
What is the formula for British Thermal Unit to Kilowatt Hour conversion?
The formula is: multiply by 2.9307e-4. This means 1 BTU = 0.000293072 kWh.
Is a British Thermal Unit bigger than a Kilowatt Hour?
Yes. One British Thermal Unit is larger than one Kilowatt Hour because 1 BTU equals 0.000293072 kWh, which is less than 1.
When do you need to convert between British Thermal Units and Kilowatt Hours?
The global standard unit of electrical energy billing — exactly one kilowatt of power consumed (or generated) for exactly one hour, equal to 3,600,000 joules (3. British Thermal Unit and Kilowatt Hour are both energy units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.