What is 18 British Thermal Units in Calories?
18 BTU = 4538.959213 cal
18 British Thermal Units is equal to 4538.959213 Calories.
18 BTU × 252.164401 = 4538.959213 cal
18 British Thermal Units is equal to 4538.959213 Calories.
18 BTU × 252.164401 = 4538.959213 cal