This calculator allows you to convert from Btu (th)/second to Femtowatt and in a reverse direction. To convert from Btu (th)/second to Femtowatt, enter the amount of Btu (th)/second into the first input and to convert from Femtowatt to Btu (th)/second, enter the amount of Femtowatt into the second input.
1 Btu (th)/second = 1.0543499999744E+18 Femtowatt
To convert Btu (th)/second to Femtowatt: Every 1 Btu (th)/second equals 1.0543499999744E+18 Femtowatt. For example, 100 Btu (th)/second equal 100 * 1.0543499999744E+18 = 1.0543499999744E+20 Femtowatt and so on..
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