The SI unit used to define energy flow rate (energy per time) is the joule per second, J/s. Note that dimensionally this is equivalent to power.

Factors in boldface are exact.

Convert	From	To	Multiply	Std
kilojoules per second	kJ/s	J/s	1000	2
megajoules per second	MJ/s	J/s	1.0 x 106	2
gigajoules per second	GJ/s	J/s	1.0 x 109	2
megajoules per hour	MJ/hr	J/s	(1.0/3600) x 106	1
gigajoules per hour	GJ/hr	J/s	(1.0/3600) x 109	1
terajoule per hour	TJ/hr	J/s	(1.0/3600) x 1012	1
megajoule per day	MJ/d	J/s	(1.0/86400) x 106	1
gigajoule per day	GJ/d	J/s	(1.0/86400) x 109	1
terajoule per day	TJ/d	J/s	(1.0/3600) x 1012	1
British thermal units per second	Bturr/s	J/s	1.05505585262 x 103	3
British thermal units per hour	Bturr/hr	J/s	0.293071	3
British thermal units per day	Bturr/d	J/s	1.221129 x 10-2	3
kilo British thermal units per hour	kBturr/hr	J/s	293.071	3
kilo British thermal units per day	kBturr/d	J/s	12.221129	3
million British thermal units per hour	MMBturr/hr	J/s	2.93071 x 105	3
million British thermal units per day	MMBturr/d	J/s	1.221129 x 104	3
million British thermal units per second	MMBturr/s	J/s	1.05505585262 x 109	3

1: BS 350:2004 Section 37 & BS 350:2004 Section 10

2: BS 350:2004 Section 37

3: BS 350:2004 Table 38 & BS 350:2004 Section 10

 

 

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