Convert 1 British Thermal Unit (Iso) to Calorie (International Table)

1 BTU (ISO) (British thermal unit (ISO)) is equal to 251.99675169581047 cal (calorie (international table)). To convert from British thermal unit (ISO) to calorie (international table), multiply by 251.99675169581045 or divide by 0.003968305120087885.

• 1 BTU (ISO) × 251.99675169581 = 251.99675169581 cal
• 1 BTU (ISO) ÷ 0.0039683051200879 = 251.99675169581 cal