What is a Pascal (Pa)?

A Pascal (Pa) is the standard SI unit for pressure. It is a very small unit, defined as one newton of force per square meter (1 N/m²). It is so small that pressure is almost always measured in kilopascals (kPa), which is 1,000 Pascals, or megapascals (MPa), which is 1,000,000 Pascals.

PSI (Pounds per Square Inch) is the standard Imperial unit for pressure, commonly used in the United States. It measures the amount of force (in pounds) applied to an area of one square inch. It is commonly used for measuring tire pressure, hydraulic systems, and in engineering.

Pascals (Pa) to PSI Converter

Q: What is the formula for Pascals (Pa) to PSI?

The formula is: PSI = Pa × 0.0001450377. It is often easier to remember the inverse: 1 PSI = 6,894.757 Pa. So, you can also use: PSI = Pa / 6894.757.

Q: How many Pascals are in 1 PSI?

There are 6,894.757 Pascals in 1 Pound per Square Inch (PSI).

A multi-unit pressure converter. Enter a value in any field to instantly convert between Pascals (Pa), Kilopascals (kPa), Megapascals (MPa), and Pounds per Square Inch (PSI).

Pounds per Square Inch (PSI)

Kilopascals (kPa)

Megapascals (MPa)

Pascals (Pa)

Scientific Notation (in Pascals)

How to Convert Pascals to PSI

The conversion between Pascals (Pa), the SI unit of pressure, and Pounds per Square Inch (PSI), the Imperial unit, is a common task in engineering and science. The most important conversion factor to remember is:

1 PSI = 6,894.757 Pascals (Pa)

Formulas Used

Pascals to PSI: PSI = Pa / 6894.757
PSI to Pascals: Pa = PSI × 6894.757

Because the Pascal is a very small unit, it is much more common to convert from **Kilopascals (kPa)** or **Megapascals (MPa)**.

Kilopascals (kPa) to PSI: PSI = kPa × 0.145038
Megapascals (MPa) to PSI: PSI = MPa × 145.038

Understanding the Units

Pascal (Pa): The SI unit of pressure, defined as one newton per square meter (N/m²). It's a very small unit, so Kilopascals (1 kPa = 1,000 Pa) are more common for everyday measurements (like weather), and Megapascals (1 MPa = 1,000,000 Pa) are used for high-pressure systems.
PSI (Pounds per Square Inch): The standard pressure unit in the United States. It measures the force in pounds-force applied to an area of one square inch. It's commonly used for tire pressure, gas tanks, and hydraulic systems.

Common Pressure Reference Points

Measurement	PSI (approx.)	Kilopascals (kPa)	Megapascals (MPa)
Standard Sea Level Pressure	14.7 PSI	101.325 kPa	0.101 MPa
Car Tire Pressure	32 PSI	220.6 kPa	0.221 MPa
Residential Water Pressure	50 PSI	344.7 kPa	0.345 MPa
1 Megapascal	145.04 PSI	1,000 kPa	1 MPa

Frequently Asked Questions (FAQ)

What is the formula for Pascals (Pa) to PSI?

The formula is: PSI = Pa / 6894.757. A more common conversion is from kilopascals: PSI = kPa * 0.145038.

How many Pascals are in 1 PSI?

There are **6,894.757 Pascals** in 1 Pound per Square Inch (PSI). Or, more simply, 6.895 kPa.

Is kPa the same as Pa?

No. The "k" stands for "kilo," which means one thousand. 1 kPa = 1,000 Pa. Similarly, "M" stands for "mega" (one million), so 1 MPa = 1,000,000 Pa.