# Pressure Unit Conversion Calculator

## This calculator will convert pressure values to ten different standard units for pressure.

Pa (N/m2)
bar
kg/cm2
mm Hg
in Hg
psi
psf
mm H2O
in H2O
atm

### Pressure Unit Conversion Calculator Applications

This calculator applies when attempting to express a pressure measurement in a number of different units. This can be useful when working with pressure sensors in an electronic circuit, designing mechanical parts, or modeling a physical system.

### Units of Pressure

This calculator converts between the following units of pressure:

• Pascal (Pa) = 1 N/m2
• Bar (bar)
• Kilogram per square centimeter (kg/cm2)
• Millimeters of mercury (mm Hg)
• Inches of mercury (in Hg)
• Pound per square inch (lb/in2)
• Pound per square foot (lb/ft2)
• Millimeters of water column at 4 °C (mm H20)
• Inches of water column at 4 °C (mm H20)
• Standard atmosphere (atm)

### Pressure Conversion Factors

The following table (Table 1) provides the conversion factors to convert from one unit of pressure to another:

Pascal (N/m2)

bar

kg/cm2

mm Hg

in Hg

psi

psf

mm H2O

in H2O atm

1 Pa
(1 N/m2)

1

0.00001

0.00001

0.00750

0.00030

0.00015

0.0209

0.102

0.00401

0.00001

1 Bar

100000

1

1.0197

750.05

29.530

14.504

2088.540

10197.162

401.463

0.987

1 kg/cm2

98066.50

0.981

1

735.56

28.959

14.223

2048.158

10000

393.701

0.968

1 mm Hg

133.322

1.333

1.360

1

0.0394

0.0193

2.784

13.595

0.5352

0.00132

1 in Hg

3386.389

0.0339

0.0345

25.40

1

0.4912

70.7261

345.316

13.595

0.0334

1 psi

6894.757

0.0690

0.0703

51.72

2.0360

1

143.9998

703.0696

27.680

0.0681

1 psf

47.880

0.00048

0.00049

0.359

0.0141

0.00694

1

4.882

0.192

0.00047

1 mm H2O

9.807

0.00010

0.00010

0.0736

0.0029

0.00142

0.2048

1

0.0394

0.00010

1 in H2O

249.089

0.00249

0.00254

1.868

0.0736

0.0361

5.2023

25.4000

1

0.00246

1 atm

101325.0

1.0133

1.0332

760

29.921

14.696

2116.213

10332.275

406.783

1