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What is a pascal?

The SI pressure unit — 1 newton per square metre

Definition

The pascal is the SI unit of pressure — one newton per square metre. Named after Blaise Pascal. 1 Pa is a very small pressure; atmospheric pressure is about 101,325 Pa. Pressure readings in engineering are usually in kPa or MPa.

Common uses

  • Scientific and engineering calculations
  • Ventilation and HVAC airflow pressures
  • Acoustic pressure (sound) measurements

🌍 Real-world scale

Atmospheric pressure: 101,325 Pa. Conversation level: 0.001 Pa sound pressure. Truck tyre: 900,000 Pa.

Convert from pascals

9 conversions
Pascal to Kilopascal1 Pa = 0.001 kPaPascal to Megapascal1 Pa = 1.0000e-6 MPaPascal to Bar1 Pa = 1.0000e-5 barPascal to Millibar1 Pa = 0.01 mbarPascal to Pound per Square Inch1 Pa = 0.000145 psiPascal to Atmosphere1 Pa = 9.8692e-6 atmPascal to Millimeter of Mercury1 Pa = 0.007501 mmHgPascal to Torr1 Pa = 0.007501 TorrPascal to Inch of Mercury1 Pa = 0.0002953 inHg

Convert to pascals

9 conversions
Kilopascal to Pascal1 kPa = 1,000 PaMegapascal to Pascal1 MPa = 1,000,000 PaBar to Pascal1 bar = 100,000 PaMillibar to Pascal1 mbar = 100 PaPound per Square Inch to Pascal1 psi = 6,894.76 PaAtmosphere to Pascal1 atm = 101,325 PaMillimeter of Mercury to Pascal1 mmHg = 133.322 PaTorr to Pascal1 Torr = 133.322 PaInch of Mercury to Pascal1 inHg = 3,386.39 Pa

Tips

  • 1 Pa = 1 N/m².
  • 1 kPa = 1000 Pa; 1 MPa = 1,000,000 Pa; 1 bar = 100,000 Pa.
  • Use kPa, MPa or bar for practical engineering work.

Common mistakes

  • Confusing Pa with psi — 1 psi = 6895 Pa.
  • Using Pa for tyre pressures — 220,000 Pa unwieldy; use 2.2 bar.
  • Mixing Pa absolute and Pa gauge without specification.

FAQ about the pascal

What is a pascal?
The pascal is the SI unit of pressure — one newton per square metre. Named after Blaise Pascal. 1 Pa is a very small pressure; atmospheric pressure is about 101,325 Pa. Pressure readings in engineering are usually in kPa or MPa.
Where is the pascal used?
The pascal is commonly used for: Scientific and engineering calculations; Ventilation and HVAC airflow pressures; Acoustic pressure (sound) measurements.
What is an example of a pascal in real life?
Atmospheric pressure: 101,325 Pa. Conversation level: 0.001 Pa sound pressure. Truck tyre: 900,000 Pa.
What category does the pascal belong to?
The pascal is a unit of pressure, part of the 10-unit pressure category on UnitConv.
How accurate are pascal conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 10 pressure units and their conversions.🎈 Pressure hub →