Pressure (Pascal)
Definition
Force applied per unit area, measured in Pascals (Pa) or PSI. Pressure = Force ÷ Area. 1 atm = 101,325 Pa = 14.696 PSI.
Why is Pressure (Pascal) Important?
Pressure (Pascal) is a core physics concept that describes the fundamental behavior of matter and energy. Understanding this principle enables engineers, students, and scientists to design better systems, solve real-world problems, and predict physical phenomena with precision.
Our physics calculators make it easy to compute values related to this concept, bridging the gap between theoretical understanding and practical application in engineering, education, and research.
What is Pressure?
Pressure is the force applied per unit area: P = F/A. It describes how concentrated a force is. The same force over a smaller area creates higher pressure (why thumbtacks work) and over a larger area creates lower pressure (why snowshoes work).
Pressure Units
| Unit | Equivalent | Common Use |
|---|---|---|
| 1 Pascal (Pa) | 1 N/m² | SI standard |
| 1 kilopascal (kPa) | 1,000 Pa | Tire pressure in metric |
| 1 atmosphere (atm) | 101,325 Pa | Standard atmospheric pressure |
| 1 bar | 100,000 Pa | Meteorology, scuba |
| 1 PSI (lb/in²) | 6,894.76 Pa | US tire pressure, pneumatics |
| 1 mmHg (Torr) | 133.32 Pa | Blood pressure, vacuum |
Everyday Pressures
| Situation | Pressure |
|---|---|
| Atmospheric pressure at sea level | 14.7 PSI (101.3 kPa, 1 atm) |
| Car tire (recommended) | 32–35 PSI (220–241 kPa) |
| Bicycle tire | 80–130 PSI (550–896 kPa) |
| Normal blood pressure | 120/80 mmHg |
| Scuba tank | 3,000 PSI (207 bar) |
| Pressure washer | 1,300–4,000 PSI |
| Bottom of Mariana Trench | 15,750 PSI (1,086 bar) |