Conversion Units of Pressure

English System (Water, Mercury at 68°F)

To convert	Multiply by	To obtain
in. water	0.0833	ft water
in. water	0.0736	in. mercury
in. water	82.98	oz/sq ft
in. water	0.03602	psi
in. water	5.1869	psi
ft. water	12	in. water
ft water	0.8832	in. mercury
ft water	995.8	in. mercury
ft water	0.4332	psi
ft water	62.24	psf
ft (any liq.)	0.4322 x sp gr	psi
in. mercury	13.57	in. water
in. mercury	1.131	ft water
in. mercury	1128	oz/sq ft
in. mercury	0.4894	psi
in. mercury	70.47	psf
in. mercury	0.03342	atm
atm	29.92	in. mercury
oz/sq ft	0.01205	in. water
oz/sq ft	0.001004	ft water
oz/sq ft	0.000887	in. mercury
oz/sq ft	0.000434	psi
oz/sq ft	0.0625	psf
psi	27.762	in. water
psi	2.314	ft water
psi	2.314/sq gr	ft (any liq.)
psi	2.043	in. mercury
psi	230.4	oz/sq ft
psi	144	psf
psi	0.06802	atm
psf	0.1928	in.water
psf	0.01607	ft.water
psf	0.01419	in.mercury
psf	16	oz/sq ft
psf	0.00694	psi
atm	14.7	psi

Metric System

To convert	Multiply by	To obtain
gr/sq cm	0.01422	psi
gr/cu cm	0.0361	lb/cu in.
kg/ sq cm	14.22	psi
kg/cu m	0.0624	lb/cu ft
kg/m	0.6720	lb/ft
meters waters	1.42	psi
meters (any liq.)	1.42 x sq gr	psi
mm mercury	0.001316	atm
lb/ft	1.4881	kg/m
psi	70.31	gr/sq cm
psi	0.07031	kg/sq cm
psi	0.7042	meters water
psi	0.7042/sp gr	meters (any liq.)
lb/cu in.	27.68	gr/cu cm
lb/cu ft	16.018	kg/cm m
atm	760	mm mercury