NiftyRecipe Online energy conversion
kWh/MJ 3.6 MJ/cal 239005.736138 BTU/kJ 1.055056 kJ/MJ 0.001 kWh/BTU 3412.141633 cal/kJ 0.004184
cal / BTU

400 calories in BTU

1.586267 BTU

1 cal = 0.003966 BTU · factor

This is energy conversion only-not a room-temperature or duct-size calculator.

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

Common values

BTU to calorie 1 calorie in BTU 2 calories in BTU 3 calories in BTU 4 calories in BTU 5 calories in BTU 6 calories in BTU 8 calories in BTU 10 calories in BTU 12 calories in BTU 15 calories in BTU
Formula: calorie to BTU

BTU = cal × 0.003966 (1 CAL = 0.003966 BTU)

Reference values: calorie → BTU
cal BTU
1 cal 0.003966 BTU
100 cal 0.396567 BTU
200 cal 0.793133 BTU
500 cal 1.982833 BTU
1000 cal 3.965667 BTU
2000 cal 7.931334 BTU

All amounts for this pair

FAQ for cal → BTU
400 calories in BTU

400 calories is 1.586267 BTU 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 calorie = 0.003966 BTU, so this amount becomes 1.586267 BTU. Reverse: 1 BTU ≈ 252.164401 calorie.

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.