Convert 1 British Thermal Unit (Iso) to Kilocalorie
0.2519967516958105 kcal
1 BTU (ISO) (British thermal unit (ISO)) is equal to 0.2519967516958105 kcal (kilocalorie). To convert from British thermal unit (ISO) to kilocalorie, multiply by 0.25199675169581043 or divide by 3.968305120087885.