Convert 1 British Thermal Unit (It) to British Thermal Unit (Iso)
0.99999606905768 BTU (ISO)
1 BTU (IT) (British thermal unit (IT)) is equal to 0.99999606905768 BTU (ISO) (British thermal unit (ISO)). To convert from British thermal unit (IT) to British thermal unit (ISO), multiply by 0.99999606905768 or divide by 1.0000039309577724.