Convert British thermal unit to watt-hour
1 BTU = 0.2930710702 Wh
1 BTU = 0.29307 Wh
1 BTU in every energy unit
| electron volt | 6.5851e+21 eV |
| hartree | 2.4200e+20 Eh |
| kiloelectron volt | 6.5851e+18 keV |
| megaelectron volt | 6.5851e+15 MeV |
| gigaelectron volt | 6,585,100,000,000 GeV |
| nanojoule | 1,055,100,000,000 nJ |
| erg | 10,551,000,000 erg |
| teraelectron volt | 6,585,100,000 TeV |
| microjoule | 1,055,100,000 µJ |
| millijoule | 1,055,100 mJ |
| inch-pound | 9,338 in·lb |
| joule | 1,055.1 J |
| foot-pound | 778.17 ft⋅lb |
| calorie | 252.16 cal |
| calorie (International Table) | 252 cal IT |
| kilojoule | 1.0551 kJ |
| BTU (thermochemical) | 1.0007 BTU th |
| British thermal unit | 1 BTU |
| watt-hour | 0.29307 Wh |
| kilocalorie | 0.25216 kcal |
| megajoule | 0.0010551 MJ |
| horsepower-hour | 0.00039301 hp·h |
| kilowatt-hour | 0.00029307 kWh |
| therm | 0.00001 therm |
| gigajoule | 0.0000010551 GJ |
| million BTU | 0.000001 MMBTU |
| megawatt-hour | 2.9307e-07 MWh |
| ton of TNT | 2.5216e-07 t TNT |
| tonne of oil equivalent | 2.5200e-08 toe |
| terajoule | 1.0551e-09 TJ |
| gigawatt-hour | 2.9307e-10 GWh |
| kiloton of TNT | 2.5216e-10 kt TNT |
| petajoule | 1.0551e-12 PJ |
| terawatt-hour | 2.9307e-13 TWh |
| megaton of TNT | 2.5216e-13 Mt TNT |
| quad | 1.0000e-15 quad |
How the conversion works
Multiply by 0.2930710702 to go from British thermal unit to watt-hour, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? watt-hour to British thermal unit — 1 Wh = 3.412141633 BTU.
British thermal unit to watt-hour — common values
| 1 BTU | 0.29307107 Wh |
| 2 BTU | 0.58614214 Wh |
| 3 BTU | 0.87921321 Wh |
| 5 BTU | 1.4653554 Wh |
| 10 BTU | 2.9307107 Wh |
| 15 BTU | 4.3960661 Wh |
| 20 BTU | 5.8614214 Wh |
| 25 BTU | 7.3267768 Wh |
| 50 BTU | 14.653554 Wh |
| 75 BTU | 21.98033 Wh |
| 100 BTU | 29.307107 Wh |
| 250 BTU | 73.267768 Wh |
| 500 BTU | 146.53554 Wh |
| 1000 BTU | 293.07107 Wh |