Pressure Conversion

Use this Pressure Conversion Tool to calculate equivalent pressure values across multiple measurement units. Simply enter a value into any input field, and the corresponding pressure values in all other units will be calculated instantly.

Pressure Conversion
Pa (N/m2)
Bar
kg/cm2
in Hg
psi
Additional Units
psf
mm H2O
in H2O
atm
Ball pressure reference
Wheel pressure reference
Water pressure reference

Introduction

Understanding Pressure Units & Conversion

Pressure is defined as the physical force exerted on an object. Specifically, it is the force applied perpendicular to the surface of an object divided by the area over which that force is distributed.

The Pascal (Pa) is the standard unit of pressure in the International System of Units (SI).

The Pressure Formula

Mathematically, pressure is expressed as:

P=FAP = \frac{F}{A}

Where:

  • PP: Pressure (Pa)
  • FF: Force applied (Newtons, N)
  • AA: Surface Area (m2m^2)

Common Units of Measurement

Our Pressure Conversion Calculator allows you to switch between units used in different industries and regions. Here are the most frequently used units:

  • Pascal (Pa): The SI base unit. It equals 1 Newton of force applied to 1 square meter (1N/m21 N/m^2).
  • Kilopascal (kPa): Equal to 1,000 Pa. Commonly used in meteorology and tire pressure in metric countries.
  • Bar: A metric unit equal to 100,000 Pa (100 kPa). It is slightly less than the average atmospheric pressure on Earth at sea level.
  • Atmosphere (atm): Represents the standard air pressure at sea level at 15°C. (1 atm=101,325 Pa1 \text{ atm} = 101,325 \text{ Pa}).
  • PSI (Pound per Square Inch): The standard imperial unit used in the US and UK. It represents the force of one pound-force applied to an area of one square inch.
  • Inch of Mercury (inHg): Defined by the pressure exerted by a column of mercury 1 inch (25.4 mm) in height. Often used in aviation and weather reports.
  • Torr (mmHg): Historically defined as 1 millimeter of mercury. 1 Torr≈133.32 Pa1 \text{ Torr} \approx 133.32 \text{ Pa}.

Pressure Unit Conversion Table

Use the table below to quickly convert between the most common pressure units.

To Convert From ↓\downarrowTo Pascal (Pa)To BarTo Atmosphere (atm)To PSI (lbf/in²)To Torr (mmHg)
1 Pascal (Pa)10.000010.000009870.0001450.0075
1 Bar100,00010.9869214.5038750.06
1 Atm101,3251.01325114.6959760
1 PSI6,894.760.068950.06805151.715
1 Torr133.3220.001330.001320.019341
1 kg/cm²98,066.50.980670.9678414.2233735.56

Frequently Asked Questions

1.What are the 5 units of pressure?

The most frequently used units of pressure are pascal (Pa), kilopascal (kPa), megapascal (MPa), psi (pound per square inch), torr (mmHg), atm (atmospheric pressure), and bar.

2.What is the unit of pressure?

For pressure, the SI system's basic unit is Pascal (Pa), which is N/m² (Newton per square meter, while Newton is kgm/s²). Pascal is a very small pressure unit and for example, the standard atmospheric pressure is 101325 Pa absolute.

3.How do you convert psi to LBS force?

PSI is a unit of measure for pressure, and pressure (PSI) is the amount of force (lbf) applied per unit of area (in2). The equations below illustrate this. To convert PSI to lbs, simply multiply the pressure by the area over which the force is applied.

4.How much pressure is a Newton?

The SI unit of the pressure is the pascal with the formula sign Pa. 1 Pascal is equal to the pressure of 1 newton per square meter. 1 Pa = 1 N / m2 ≡ 1 kg / m · s2.

5.How vacuum pressure is measured?

Vacuum pressure is measured relative to ambient atmospheric pressure. It is referred to as pounds per square inch (vacuum) or PSIV. The electrical output of a vacuum pressure transducer is 0 VDC at 0 PSIV (14.7 PSIA) and full-scale output (typically 5 VDC) at full-scale vacuum, 14.7 (0 PSIA).

6.What is meant by Pascal?

A pascal is a unit of pressure, where one pascal is equal to the force of one newton exerted on one square meter. A pascal is a unit of pressure, where one pascal is equal to the force of one newton exerted on one square meter.

7.What is the SI unit of force and pressure?

Pressure—the effect of a force applied to a surface—is a derived unit, obtained from combining base units. The unit of pressure in the SI system is the pascal (Pa), defined as a force of one Newton per square meter. The conversion between atm, Pa, and torr is as follows: 1 atm = 101325 Pa = 760 torr.

8.How much psi can a human take?

The body is a lot more resilient than you think. The human body can withstand 50 psi (pounds per square inch) and that's if it's a sudden impact. However if it's sustained pressure, the body can withstand up to 400 psi if the weight is gradually increased.

9.What is pressure and how is it calculated?

Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter or N/m2. If you convert an atmosphere to pounds per square inch, it's about 14.7 psi.

10.What is a perfect vacuum in PSI?

At atmospheric pressure, the value 0 in. -Hg is equivalent to 14.7 psia. At the opposite reference point, 0 psia, — a perfect vacuum (if it could be attained) — would have a value equal to the other extreme of its range, 29.92 in. -Hg.

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