Pressure Unit Conversion

Standard Pressure

Standard pressure: 1 atm = 101.325 kPa = 1013.25 mbar = 760 Torr

Conversion Tables

mbar	atm	psi	Torr	Pa
100	0.099	1.45	75.0	10 000
200	0.197	2.90	150	20 000
300	0.296	4.35	225	30 000
400	0.395	5.80	300	40 000
500	0.493	7.25	375	50 000
600	0.592	8.70	450	60 000
700	0.691	10.2	525	70 000
800	0.790	11.6	600	80 000
900	0.888	13.1	675	90 000
1 000	0.987	14.5	750	100 000

Torr	Pa	mbar	atm	psi
100	13 300	133	0.13	1.93
200	26 700	267	0.26	3.87
300	40 000	400	0.39	5.80
400	53 300	533	0.53	7.73
500	66 700	667	0.66	9.67
600	80 000	800	0.79	11.6
700	93 300	933	0.92	13.5
800	107 000	1 070	1.05	15.5
900	120 000	1 200	1.18	17.4
1 000	133 000	1 330	1.32	19.3

psi	Torr	Pa	mbar	atm
1	52	6 900	69	0.07
2	103	13 800	138	0.14
3	155	20 700	207	0.20
4	207	27 600	276	0.27
5	259	34 500	345	0.34
6	310	41 400	414	0.41
7	362	48 300	483	0.48
8	414	55 200	552	0.54
9	465	62 100	621	0.61
10	517	69 000	689	0.68

Pressure vs. Height (barometric formula)

Static pressure p depends on the height h above sea level. You can calculate p using the barometric formula:

Info: The pressure scales are linear, e.g. 10^–4 mbar = 10^–6 × 100 mbar = 10^–6 × 75 Torr = 7.5 × 10^–5 Torr.