Pressure Unit Converter - Pa bar psi atm mmHg | Free Online Tool

Enter Value

e.g., 101325

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Conversion Results

101325

kPa

101.325

MPa

0.101325

bar

1.01325

mbar

1013.25

atm

1.00000

psi

14.6959

psf

2116.22

kgf/cm²

1.03323

mmHg

760.000

inHg

29.9213

Torr

760.000

mmH₂O

10332.3

inH₂O

406.782

Conversion Formulas

Pa to bar

1 Pa = 0.00001 bar

Pa to atm

1 Pa = 9.8692 × 10⁻⁶ atm

Pa to psi

1 Pa = 0.000145038 psi

Pa to mmHg

1 Pa = 0.00750062 mmHg

atm to Pa

1 atm = 101,325 Pa

bar to Pa

1 bar = 100,000 Pa

psi to Pa

1 psi = 6,894.76 Pa

Pressure Units Guide

Atmosphere (atm)

1 atm = 101,325 Pa. Standard atmospheric pressure at sea level.

Pascal (Pa)

SI base unit. 1 Pa = 1 N/m²

Conversion Tip

psi is mainly used in US/UK, bar in Europe

What is the Pressure Converter?

A tool that converts between 13 different pressure units in real-time, including Pascal (Pa), bar, psi, atmosphere (atm), and millimeter of mercury (mmHg). Enter a value to see conversion results for all units simultaneously.

Simultaneous conversion among 13 pressure units
Adjustable decimal precision
Automatic display of conversion formulas
Support for both SI units (Pa) and engineering units (bar, psi, atm)
One-click result copying

How to Use

1
Choose a Unit
Choose the input unit for the pressure you want to convert (Pa, bar, psi, atm, and others).
2
Enter a Value
Enter the pressure value you want to convert.
3
Review the Results
The value is converted and displayed in 13 units at once.
4
Adjust the Precision
Set the number of decimal places to view results at the precision you need.

Frequently Asked Questions

1 atm = 101,325 Pa. This is standard atmospheric pressure at sea level and equals about 1013 hPa or 1.013 bar.

psi (pounds per square inch) is used mainly in the United States and United Kingdom for tire pressure, pipe pressure, fire-extinguisher pressure, and similar measurements.

For practical purposes, 1 mmHg ≈ 1 torr. mmHg is commonly used for blood pressure, while torr is mainly used in vacuum technology.

They are similar but not identical. 1 bar = 100,000 Pa, while 1 atm = 101,325 Pa. Therefore, 1 bar ≈ 0.987 atm.

kgf/cm² (kilogram-force per square centimeter) is commonly used in Korea and Japan for engineering work, boiler pressure, and hydraulic-equipment specifications.

Tips & Best Practices

Passenger-car tire pressure is typically 32–35 psi (about 2.2–2.4 bar).
The mmHg used for blood pressure means millimeters of mercury; a typical normal reading is about 120/80 mmHg.
Weather forecasts use hPa (hectopascals) for atmospheric pressure, where 1 hPa = 100 Pa = 1 mbar.
Convert psi in U.S. product specifications to bar for easier comparison with European standards.
For physics problems, it is often easiest to standardize all values in the SI unit of Pa.

What is the Pressure Converter?

Simultaneous conversion among 13 pressure units

Adjustable decimal precision

Automatic display of conversion formulas

Support for both SI units (Pa) and engineering units (bar, psi, atm)

One-click result copying

How to Use

Choose a Unit

Choose the input unit for the pressure you want to convert (Pa, bar, psi, atm, and others).

Enter a Value

Enter the pressure value you want to convert.

Review the Results

The value is converted and displayed in 13 units at once.

Adjust the Precision

Set the number of decimal places to view results at the precision you need.

Frequently Asked Questions

1 atm = 101,325 Pa. This is standard atmospheric pressure at sea level and equals about 1013 hPa or 1.013 bar.

psi (pounds per square inch) is used mainly in the United States and United Kingdom for tire pressure, pipe pressure, fire-extinguisher pressure, and similar measurements.

For practical purposes, 1 mmHg ≈ 1 torr. mmHg is commonly used for blood pressure, while torr is mainly used in vacuum technology.

They are similar but not identical. 1 bar = 100,000 Pa, while 1 atm = 101,325 Pa. Therefore, 1 bar ≈ 0.987 atm.

kgf/cm² (kilogram-force per square centimeter) is commonly used in Korea and Japan for engineering work, boiler pressure, and hydraulic-equipment specifications.

Tips & Best Practices

Passenger-car tire pressure is typically 32–35 psi (about 2.2–2.4 bar).

The mmHg used for blood pressure means millimeters of mercury; a typical normal reading is about 120/80 mmHg.

Weather forecasts use hPa (hectopascals) for atmospheric pressure, where 1 hPa = 100 Pa = 1 mbar.

Convert psi in U.S. product specifications to bar for easier comparison with European standards.

For physics problems, it is often easiest to standardize all values in the SI unit of Pa.