Pressure Conversion Tables

Technical Data Section Reference

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PRESSURE CONVERSION TABLE TO HELP IN APPLYING   OMEGA® PRESSURE TRANSDUCERS
Multiply by the conversion factors to obtain the new units	Atmos	Bars	Dynes/cm2	In of Hg (0°C)	In of H2O (4°C)	K grams/ meter2
Atmos	1	9.86923x 10-1	9.86923 x 10-7	3.34207 x 10-2	2.458 x 10-3	9.678 x 10-5
Bars	1.01325	1	1 x 10-6	3.3864 x 10-2	2.491 x 10-3	9.8067 x 10-5
Dynes/cm2	1.01325 x 106	106	1	3.386 x 104	2.491 x 103	98.067
In of Hg (0°C)	29.9213	29.53	2.953 x 10-5	1	7.355 x 10-2	2.896 x 10-3
In of H2O (4°C)	406.8	401.48	4.0148 x 10-4	13.60	1	3.937 x 10-2
K grams/meter2	1.033227 x 104	1.0197 x 104	1.0197 x 10-2	345.3	25.40	1
Lb/In2 psi	14.695595	14.504	1.4504 x 10-5	0.4912	3.6126 x 10-2	1.423 x 10-3
Lb/ft2	2116.22	2088.5	2.0885 x 10-3	70.726	5.202	0.2048
mm of Hg torr	760	750.06	7.5006 x 10-4	25.400	1.868	7.3558 x 10-2
Microns	760 x 103	750.06 x 103	0.75006	2.54 x 104	1.868 x 103	73.558
Pascals	1.01325 x 105	1 x 105	10-1	3.386 x 103	2.491 x 102	9.8067

PRESSURE CONVERSION TABLE TO HELP IN APPLYING   OMEGA® PRESSURE TRANSDUCERS
Multiply by the conversion factors to obtain the new units	Lb/In2 psi	Lb/ft2	mm of Hg torr	Microns	Pascals
Atmos	0.068046	4.7254 x 10-4	1.316 x 10-3	1.316 x 10-6	9.869 x 10-6
Bars	6.8948 x 10-2	4.788 x 10-4	1.333 x 10-3	1.333 x 10-6	10-5
Dynes/cm2	6.8948 x 104	478.8	1.333 x 103	1.333	10
In of Hg (0°C)	2.036	0.014139	3.937 x 10-2	3.937 x 10-5	2.953 x 10-4
In of H2O (4°C)	27.68	0.1922	0.5354	5.354 x 10-4	4.014 x 10-3
K grams/meter2	7.0306 x102	4.882	13.59	13.59 x 10-3	1.019 x 10-1
Lb/In2 psi	1	6.9444 x 10-3	1.934 x 10-2	1.934 x 10-5	1.450 x 10-4
Lb/ft2	144.0	1	2.7844	2.7844 x 10-3	2.089 x 10-2
mm of Hg torr	51.715	0.35913	1	10-3	7.502 x 10-3
Microns	51.715 x 103	359.1	1 x 103	1	7.502
Pascals	6.8948 x 103	4.788 x 101	1.333 x 102	1.333 x 10-1	1

TEMPERATURE CONVERSION CHART
°C	°F	°C	°F	°C	°F
-200	-328	0	32	140	284
-180	292	5	41	160	320
-160	-256	10	50	180	356
-140	-220	15	59	200	392
-120	-184	20	68	212	414
-100	-148	25	77	220	428
-90	-130	30	86	250	482
-80	-112	40	104	300	572
-70	-94	50	122	350	662
-60	-76	60	140	400	752
-50	-58	70	158	450	842
-40	-40	80	176	500	932
-30	-22	90	194	600	1112
-20	-4	100	212	700	1292
-10	+14	120	248	800	1472
				900	1652
				1000	1832

METRIC
English	Metric
mm = 0.03937 in.	in.= 25.4 mm
cm = 0.3937 in.	in. = 2.54 cm
m = 39.37 in.	in. = 2.54 x 10-2 m

TEMPERATURE
Celcius	Fahrenheit
°C = (F-32) / 1.8	°F = 1.8C + 32

PRESSURE VS. ALTITUDE
Altitude (Feet)	Pressure
	in of Hg	mm of Hg	psia
-1,000	31.02	787.9	15.25
-500	30.47	773.8	14.94
0	29.921	760.0	14.70
500	29.38	746.4	14.43
1,000	28.86	732.9	14.18
1,500	28.33	719.7	13.90
2,000	27.82	706.6	13.67
2,500	27.31	693.8	13.41
3,000	26.81	681.1	13.19
3,500	26.32	668.6	12.92
4,000	25.84	656.3	12.70
4,500	25.36	644.2	12.45
5,000	24.89	632.3	12.23
10,000	20.58	522.6	10.10
15,000	16.88	428.8	8.28
20,000	13.75	349.1	6.75
30,000	8.88	225.6	4.36
40,000	5.54	140.7	2.72
50,000	3.426	87.30	1.689
60,000	2.132	54.15	1.048
70,000	1.322	33.59	0.649
80,000	0.820	20.83	0.403

SI: The Modernized Metric System
SI - the International System of Units - establishes the pascal (Pa) as the standard unit for Pressure or Stress in the modernized Metric System adopted by the American National Standards Institute.
To Convert to pascals	Multiply by
atmosphere	1.013 x 105
bar	1.000 x 105
dyne/centimeter2	1.000 x 10-1
inch of mercury (0°C)	3.386 x 103
inch of water (4°C)	2.491 x 102
kilogram/meter2	9.807
pound/inch2 (psi)	6.894 x 103
pound/foot2	4.788 x 101
torr (mm of mercury 0°C)	1.333 x 102

PRESSURE CONVERSION CHART
psi	in. 0f H2O	in. of Hg	mm of H2O	mm of Hg	bar	mbar
.01	.2768	.0204	7.031	.5171	.0007	.6895
.02	.5536	.0407	14.06	1.034	.0014	1.379
.03	.8304	.0611	21.09	1.551	.0021	2.068
.04	1.107	.0814	28.12	2.068	.0028	2.758
.05	1.384	.1018	35.15	2.586	.0034	3.447
.06	1.661	.1222	42.18	3.103	.0041	4.137
.07	1.938	.1425	49.22	3.620	.0048	4.826
.08	2.214	.1629	56.25	4.137	.0055	5.516
.09	2.491	.1832	63.28	4.654	.0062	6.205
.10	2.768	.2036	70.31	5.171	.0069	6.895
.20	5.536	.4072	140.6	10.34	.0138	13.79
.30	8.304	.6108	210.9	15.51	.0207	20.68
.40	11.07	.8144	281.2	20.68	.0276	27.58
.50	13.84	1.018	351.5	25.86	.0345	34.47
.60	16.61	1.222	421.8	31.03	.0414	41.37
.70	19.38	1.425	492.2	36.20	.0483	48.26
.80	22.14	1.629	562.5	41.37	.0552	55.16
.90	24.91	1.832	632.8	46.54	.0620	62.05
1.0	27.68	2.036	703.1	51.71	.0690	68.95
2.0	55.36	4.072	1406	103.4	.1379	137.9
3.0	83.04	6.108	2109	155.1	.2068	206.8
4.0	110.7	8.144	2812	206.8	.2758	275.8
5.0	138.4	10.18	3515	258.6	.3447	344.7
6.0	166.1	12.22	4218	310.3	.4137	413.7
7.0	193.8	14.25	4922	362.0	.4826	482.6
8.0	221.4	16.29	5625	413.7	.5516	551.6
9.0	249.1	18.32	6328	465.4	.6205	620.5
10.0	276.8	20.36	7031	517.1	.6895	689.5
14.7	406.9	29.93	10340	760.2	1.014	1014
15.0	415.2	30.54	10550	775.7	1.034	1034
20.0	553.8	40.72	14060	1034	1.379	1379
25.0	692.0	50.90	17580	1293	1.724	1724
30.0	830.4	61.08	21090	1551	2.068	2068
40.0	1107	81.44	28120	2068	2.758	2758
50.0	1384	101.8	35150	2586	3.447	3447
100.0	2768	203.6	70310	5171	6.895	6895
150.0	4152	305.4	105500	7757	10.34	10340
200.0	5538	407.2	140600	10340	13.79	13790
250.0	6920	509.0	175800	12930	17.24	17240

PSI CONVERSION FACTORS
To PSI	From PSI
psi = in. of H2O x (3.6127 x 10-2)	in. of H2O = psi x 27.68
psi = in. of Hg x (0.49118)	in. of Hg = psi x 2.036
psi = mm of H2 x (1.4223 x 10-3)	mm of H2O = psi x 703.1
psi = mm of Hg x (1.9339 x 10-2)	mm of Hg = psi x 51.71
psi = cm of H2O x (14.223 x 6-3)	cm of H2O = psi x 70.3
psi = kg/cm2 x (14.223)	kg/cm2 = psi x .0703
psi = bar x (14.503)	bar = psi x .0689
psi = mbar x (1.4503 x 10-2)	mbar = psi x 68.95
psi = Pa x (1.4503 x 10-4)	Pa = psi x 6895
psi = kPa x (1.4503 x 10-1)	kPa = psi x 6.895