What is 13 British Thermal Units in Calories?
13 BTU = 3278.137209 cal
13 British Thermal Units is equal to 3278.137209 Calories.
13 BTU × 252.164401 = 3278.137209 cal
13 British Thermal Units is equal to 3278.137209 Calories.
13 BTU × 252.164401 = 3278.137209 cal