NiftyRecipe Online energy conversion
MJ/kWh 0.277778 kJ/kWh 0.000278 kJ/kcal 0.239006 kWh/kJ 3600 kWh/MJ 3.6 BTU/kcal 0.252164
BTU / kJ

400 BTUs in kilojoule

422.022341 kilojoule

1 BTU = 1.055056 kJ · factor

400 BTUs equals 422.022341 kilojoule. BTU figures appear on many US heating and air-conditioning specs.

Enter a value and click Calculate - opens the page with the new result

Common values

kilojoule to BTU 1 BTU in kilojoule 2 BTUs in kilojoule 3 BTUs in kilojoule 4 BTUs in kilojoule 5 BTUs in kilojoule 6 BTUs in kilojoule 8 BTUs in kilojoule 10 BTUs in kilojoule 12 BTUs in kilojoule 15 BTUs in kilojoule

Same amount, other units

400 BTUs → kcal 400 BTUs → cal 400 BTUs → kWh 400 BTUs → MJ

Related converters

BTU → kcal BTU → cal BTU → kWh BTU → MJ
Formula: BTU to kilojoule

kJ = BTU × 1.055056 (1 BTU = 1.055056 KJ)

Reference values: BTU → kilojoule
BTU kJ
1 BTU 1.055056 kJ
100 BTU 105.505585 kJ
200 BTU 211.011171 kJ
500 BTU 527.527926 kJ
1000 BTU 1055.055853 kJ
2000 BTU 2110.111705 kJ

All amounts for this pair

FAQ for BTU → kJ
400 BTUs in kilojoule

400 BTUs is 422.022341 kilojoule on NiftyRecipe using a fixed thermal-energy factor.

British thermal units show up on air-conditioner nameplates, furnace ratings and heating-load notes. Converting them to kcal, kJ or kWh uses 1 BTU = 1.055056 kilojoule, so this amount becomes 422.022341 kilojoule. Reverse: 1 kilojoule ≈ 0.947817 BTU.

The text stays on capacity and energy equivalence-not oven temperatures or duct geometry-so these pages stay distinct from food-label converters. Adjust the amount above for different appliance ratings or textbook examples.