In 1 calorie / second [cal / s] [international] there is 0.0039683 BTU / second [BTU / s] [international].

BTU / hour [BTU / hr] [international] BTU / hour [BTU / hr] [ISO] BTU / hour [BTU / hr] [thermochemical] BTU / minute [BTU / min] [international] BTU / minute [BTU / min] [ISO] BTU / minute [BTU / min] [thermochemical] BTU / second [BTU / s] [international] BTU / second [BTU / s] [ISO] BTU / second [BTU / s] [thermochemical] calorie / hour [cal / hr] [international] calorie / hour [cal / hr] [thermochemical] calorie / minute [cal / min] [international] calorie / minute [cal / min] [thermochemical] calorie / second [cal / s] [international] calorie / second [cal / s] [thermochemical] erg / hour [erg / hr] erg / minute [erg / min] erg / second [erg / s] foot pound / hour [ft lb / hr] foot pound / minute [ft lb / min] foot pound / second [ft lb / s] horsepower [hp] [European electrical] horsepower [hp] [imperial, electrical] horsepower [hp] [imperial, mechanical] horsepower [hp] [metric] lucsec newton meter / hour newton meter / minute newton meter / second poncelet volt ampere [VA] [AC, PF=80%] volt ampere [VA] [AC, PF=90%] volt ampere [VA] [DC] watt [joules / sec] [W]

BTU / hour [BTU / hr] [international] BTU / hour [BTU / hr] [ISO] BTU / hour [BTU / hr] [thermochemical] BTU / minute [BTU / min] [international] BTU / minute [BTU / min] [ISO] BTU / minute [BTU / min] [thermochemical] BTU / second [BTU / s] [international] BTU / second [BTU / s] [ISO] BTU / second [BTU / s] [thermochemical] calorie / hour [cal / hr] [international] calorie / hour [cal / hr] [thermochemical] calorie / minute [cal / min] [international] calorie / minute [cal / min] [thermochemical] calorie / second [cal / s] [international] calorie / second [cal / s] [thermochemical] erg / hour [erg / hr] erg / minute [erg / min] erg / second [erg / s] foot pound / hour [ft lb / hr] foot pound / minute [ft lb / min] foot pound / second [ft lb / s] horsepower [hp] [European electrical] horsepower [hp] [imperial, electrical] horsepower [hp] [imperial, mechanical] horsepower [hp] [metric] lucsec newton meter / hour newton meter / minute newton meter / second poncelet volt ampere [VA] [AC, PF=80%] volt ampere [VA] [AC, PF=90%] volt ampere [VA] [DC] watt [joules / sec] [W]