Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 BTU | 1.05506e-06 MJ | |
| 0.01 BTU | 1.05506e-05 MJ | |
| 0.1 BTU | 0.000105506 MJ | |
| 1 BTU | 0.00105506 MJ | |
| 5 BTU | 0.0052753 MJ | |
| 10 BTU | 0.0105506 MJ | |
| 50 BTU | 0.052753 MJ | |
| 100 BTU | 0.105506 MJ | |
| 1000 BTU | 1.05506 MJ |
Formula: Megajoule = BTU × 0.001055
Multiply any btu value by 0.001055 to get megajoule.
Reverse: BTU = Megajoule × 947.8
Common btu values — factor: 1 BTU = 0.001055 MJ
| BTU (BTU) | Megajoule (MJ) | Context |
|---|---|---|
| 1 BTU | 0.001055 MJ | Match |
| 10 BTU | 0.01055 MJ | 10 BTU |
| 100 BTU | 0.1055 MJ | Space heater second |
| 1,000 BTU | 1.055 MJ | 1 kBTU |
| 3,412 BTU | 3.6 MJ | 1 kWh |
| 1e+04 BTU | 10.55 MJ | 10 kBTU |
| 1e+05 BTU | 105.5 MJ | 1 therm |
| 1e+06 BTU | 1,055 MJ | 1 MMBTU |
| 1e+07 BTU | 1.055e+04 MJ | 10 MMBTU |
| 1e+08 BTU | 1.055e+05 MJ | 100 MMBTU |
| 1.000e+09 BTU | 1.055e+06 MJ | 1 billion BTU |
| 1.000e+10 BTU | 1.055e+07 MJ | 10 billion BTU |
| 1.000e+12 BTU | 1.055e+09 MJ | 1 quad fraction |
| 1.000e+15 BTU | 1.055e+12 MJ | 1 quad |
| 1.000e+18 BTU | 1.055e+15 MJ | 1000 quads |
1 BTU = 0.001055 MJ. Memorize for instant estimates.
Use 0.0011 as a quick mental multiplier.
Multiply result by 947.8 to recover the original BTU value.
Sizes heating and cooling systems rated in BTU/hour for US buildings.
Certifies boiler output and efficiency ratings in BTU/hour.
Prices natural gas supply and usage in BTU and therms.
Calculates heating loads and heat loss in BTU for US properties.
Rates commercial refrigeration and ice-making capacity in BTU.
Specifies heat exchanger capacity and furnace output in BTU/hour.
The British Thermal Unit (BTU) is the traditional Imperial energy unit, defined as the heat required to raise 1 pound of water by 1°F. It equals 1,055.06 joules and has been used since the 19th century in heating, air conditioning, and gas billing.
BTU remains dominant in US HVAC: air conditioners and heaters are rated in BTU/hour. Natural gas is priced in therms (100,000 BTU) in the US. Furnaces are rated in BTU/hour output.
Interesting fact: A typical US home furnace is rated at 80,000–120,000 BTU/hour. One BTU is roughly the energy released by burning one kitchen match. The US natural gas pipeline system delivers about 25 quadrillion BTU (quads) per year.
The megajoule (MJ) equals 1,000,000 joules and is used for large-scale energy measurements in engineering, transportation, and industrial processes.
One liter of petrol contains about 34 MJ of chemical energy. A bolt of lightning releases about 1-5 MJ. An adult's daily food intake is roughly 8-10 MJ. Electric vehicle batteries are typically rated at 40-100 MJ (11-28 kWh).
Interesting fact: The kinetic energy of a 1,000 kg car traveling at 100 km/h is about 0.385 MJ. TNT explosive releases about 4.6 MJ per kilogram when detonated.
Converting btu to megajoule is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 BTU = 0.005275 MJ and 10 BTU = 0.01055 MJ. Reverse: 1 MJ = 947.8 BTU. Exact factor: 1 BTU = 0.001055 MJ.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.