The SI unit used to define mass flow rate is kilograms per second, kg/s.

Factors in boldface are exact.

Convert	From	To	Mulitply	Std
pound (avoirdupois) per hour	lb/hr	kg/s	(0.45359237/3600)	3
pound per second	lb/s	kg/s	0.45359237	1
kilogram per hour	kg/hr	kg/s	(1.0/3600)	2
tonne per second	tonne/s	kg/s	1000	1
tonne per hour	tonne/hr	kg/s	(1.0/3.6)	3
ton (short) per second	short ton/s	kg/s	907.18474	1
ton (short) per hour	short ton/hr	kg/s	(907.18474/3600)	3
kilogram per day	kg/day	kg/s	(1.0/86400)	2
tonne per day	tonne/day	kg/s	(1.0/86.4)	3
ton (short) per day	short ton/day	kg/s	(907.18474/86400)	3
kilo pound per second	klb/s	kg/s	453.59237	3
kilo pound per hour	klb/hr	kg/s	(453.59237/3600)	3
kilo pound per day	klb/day	kg/s	(453.59237/86400)	3
ton (long) per second	long ton/s	kg/s	(1016.0469088)	1
ton (long) per hour	long ton/hr	kg/s	(1016.0469088/3600)	1
ton (long) per day	long ton/day	kg/s	(1016.0469088/86400)	1

1: BS 350:2004 Section 15

2: BS 350:2004 Section 10

3: BS 350:2004 Section 15 & Section 10

 

 

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