Convert 1 Calorie (International Table) to British Thermal Unit (Iso)
0.003968305120087885 BTU (ISO)
1 cal (calorie (international table)) is equal to 0.003968305120087885 BTU (ISO) (British thermal unit (ISO)). To convert from calorie (international table) to British thermal unit (ISO), multiply by 0.003968305120087885 or divide by 251.99675169581045.