Pascal (Pa) – The SI Unit of Pressure

Thepascal (Pa)is the fundamental unit of pressure in the International System of Units (SI). It is defined as one newton per square meter (1 Pa = 1 N/m²) and is used to measure the force exerted on a given area.

History & Background

Named after the French mathematician and physicist Blaise Pascal, the pascal was established as part of the SI system to provide a clear and consistent way to measure pressure in scientific and engineering applications.

Conversion Factors

• 1 Pa = 1 N/m²
• 1 kPa = 1,000 Pa
• 1 bar = 100,000 Pa
• 1 psi ≈ 6,894.76 Pa
• 1 atm = 101,325 Pa
• 1 torr = 133.322 Pa
• 1 mmHg = 133.322 Pa
• 1 inHg ≈ 3386.39 Pa

Applications

Pascals are used in a wide range of scientific and engineering applications, including fluid dynamics, material science, and meteorology.

Interesting Facts

Standard atmospheric pressure at sea level is approximately 101,325 Pa, providing a useful reference point for many practical calculations.

Conclusion

As the SI unit for pressure, the pascal offers precision and consistency, making it indispensable for a broad spectrum of scientific and industrial applications.