Input Btu (IT) Btu (th) Btu (mean) calories (IT) calories (th) calories (mean) calories (15C) calories (20C) calories (food) centigrade heat units electron volts [eV] ergs foot pounds-force foot poundals gigajoules [GJ] horsepower hours joules [J] kilocalories (IT) kilocalories (th) kilogram-force meters kilojoules [kJ] kilowatt hours [kWh] megajoules [MJ] newton meters [Nm] therms watt seconds [Ws] watt hours [Wh]

Output Btu (IT) Btu (th) Btu (mean) calories (IT) calories (th) calories (mean) calories (15C) calories (20C) calories (food) centigrade heat units electron volts [eV] ergs foot pounds-force foot poundals gigajoules [GJ] horsepower hours joules [J] kilocalories (IT) kilocalories (th) kilogram-force meters kilojoules [kJ] kilowatt hours [kWh] megajoules [MJ] newton meters [Nm] therms watt seconds [Ws] watt hours [Wh]