This calculator allows you to convert from Btu (th)/second to Kilocalorie (th)/minute and in a reverse direction. To convert from Btu (th)/second to Kilocalorie (th)/minute, enter the amount of Btu (th)/second into the first input and to convert from Kilocalorie (th)/minute to Btu (th)/second, enter the amount of Kilocalorie (th)/minute into the second input.