Pressure Conversion

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:

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

Where:

• $P$: Pressure (Pa)
• $F$: Force applied (Newtons, N)
• $A$: Surface Area ($m^2$)

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 ($1 N/m^2$).
• 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. ($1 \text{ atm} = 101,325 \text{ Pa}$).
• 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.

---

Pressure Unit Conversion Table

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

To Convert From $\downarrow$	To Pascal (Pa)	To Bar	To Atmosphere (atm)	To PSI (lbf/in²)	To Torr (mmHg)
1 Pascal (Pa)	1	0.00001	0.00000987	0.000145	0.0075
1 Bar	100,000	1	0.98692	14.5038	750.06
1 Atm	101,325	1.01325	1	14.6959	760
1 PSI	6,894.76	0.06895	0.06805	1	51.715
1 Torr	133.322	0.00133	0.00132	0.01934	1
1 kg/cm²	98,066.5	0.98067	0.96784	14.2233	735.56