Pressure Calculator

Calculate pressure, force, or area using P = F/A. Includes unit conversion across Pa, kPa, MPa, bar, psi, atm, mmHg, and inHg with everyday reference examples.

Pressure

1,000 Pa

Force

1,000 N

Area

1 m²

Converted Units

1,000

Pa

1

kPa

0.001

MPa

0.01

bar

0.145

psi

0.0099

atm

7.5006

mmHg

0.2953

inHg

Understanding Pressure

Pressure is a fundamental concept in physics and engineering, defined as force per unit area. The formula P = F/A means the same force creates much higher pressure when applied to a smaller area. This is why nails have sharp points — the small area creates enough pressure to penetrate wood even with moderate hammer force.

Pressure Unit Conversions

UnitEquivalent
1 Pa1 N/m² (base SI unit)
1 kPa1,000 Pa
1 bar100,000 Pa
1 psi6,894.76 Pa
1 atm101,325 Pa
1 mmHg133.322 Pa

Frequently Asked Questions

What is pressure?
Pressure is force applied over an area: P = F/A. It measures how concentrated a force is. A sharp knife cuts easily because the force is concentrated on a tiny area, creating high pressure. The same force applied over a larger area (like a blunt knife) creates lower pressure and cuts poorly. Pressure is measured in pascals (Pa), where 1 Pa = 1 N/m².
What is atmospheric pressure?
Standard atmospheric pressure at sea level is 101,325 Pa (1 atm, 14.7 psi, or 760 mmHg). This means every square inch of your body at sea level experiences about 14.7 pounds of force from the air above. We don't feel it because our bodies push back with equal pressure. At higher altitudes, pressure decreases — Denver (5,280 ft) has about 12.2 psi.
How do I convert between pressure units?
Common conversions: 1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi = 760 mmHg = 29.92 inHg. To convert from one unit to another, multiply by the conversion factor. For example, to convert 2 bar to psi: 2 × (100,000 / 6894.76) = 29.0 psi. This calculator handles all common pressure unit conversions automatically.

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