94.781712
BTU
94.845141
BTU
0.00094804
therm
0.02777778
kWh
0.1
MJ
94.781712
BTU
94.845141
BTU
0.00094804
therm
0.02777778
kWh
0.1
MJ
The Joules to BTU Converter converts energy measured in joules (J) to British Thermal Units (BTU) and therms using the standard conversion factor 1 BTU = 1,055.06 J. This reverse conversion is important when translating SI energy values into the units used by the North American HVAC and energy industries.
Engineers and energy analysts frequently need to convert joules (or megajoules) to BTU when preparing reports for US and Canadian audiences, sizing heating and cooling equipment, or comparing energy sources. Fuel energy content, building heat loss calculations, and equipment specifications all commonly use BTU in these markets.
The conversion factor is derived from the International Table definition: 1 BTU_IT = 1055.05585262 J. Dividing joules by this value yields BTU. For very large energy values, the therm (100,000 BTU) provides a more convenient scale — natural gas utilities in the US bill in therms.
Understanding joules-to-BTU conversion also helps in comparative energy analysis. For instance, knowing that 1 MJ ≈ 948 BTU helps quickly assess whether a solar panel (producing maybe 5 MJ/day per m²) can meet a home heating need (perhaps 50,000 BTU/day). These cross-unit comparisons are essential for sustainable energy planning and building performance analysis.
Our converter provides both BTU and therms, covering the full range from laboratory measurements to industrial energy accounting. Results are accurate to 4+ significant figures using the internationally standardized conversion factor.
The formula: BTU = joules ÷ 1055.06. For therms: therms = joules ÷ 105,506,000 (since 1 therm = 100,000 BTU). Alternatively, BTU = joules × 0.000947817.
Scale reference: 1 kJ ≈ 0.948 BTU, 1 MJ ≈ 948 BTU, 1 GJ ≈ 947,817 BTU ≈ 9.48 therms. A typical US home uses about 50–100 million BTU per year for heating.
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Results
1 MJ ≈ 948 BTU
Inputs
Results
1 therm = 100,000 BTU = 105.5 MJ
Divide joules by 1055.06. For example, 5,000 J ÷ 1055.06 ≈ 4.74 BTU.
1 MJ = approximately 947.82 BTU. This is useful for comparing SI energy values with US HVAC units.
A therm equals 100,000 BTU (approximately 105.5 MJ). US natural gas utilities commonly use therms for billing.
When preparing technical reports for North American audiences, sizing HVAC equipment, comparing fuel energy content, or translating international energy data to US units.
Divide kJ by 1.05506, or multiply kJ by 0.947817. For example, 10 kJ ≈ 9.48 BTU.
1 GJ = approximately 9.48 therms (947,817 BTU). This is roughly the energy in 9.5 CCF of natural gas.
1 kWh = 3,412.14 BTU. US energy statistics use this to compare electricity with fossil fuels.
1 BTU ≈ 1055 J ≈ 1 kJ. So BTU and kilojoules are roughly the same order of magnitude.
The conversion uses the International Table BTU definition (1055.05585262 J), which is internationally standardized. Results are precise to the converter's displayed decimal places.
US energy statistics report primary energy in quadrillion BTU (quads). One quad = 10¹⁵ BTU ≈ 1.055 EJ. US total energy consumption is about 100 quads/year.
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