Pressure measures how concentrated a force is over a surface.
About this calculator
Pressure measures how concentrated a force is over a surface. This calculator uses P = F/A with force in newtons and area in m². Results show pascals and kilopascals.
Example: 500 N on 0.01 m² (100 cm²) gives 50,000 Pa = 50 kPa. Atmospheric pressure at sea level is about 101,325 Pa (1 atm). A sharp knife cuts because small contact area creates high pressure for the same force.
For gas pressure from moles and temperature, use the [[ideal-gas-law]] calculator. Find the applied force with the [[force]] calculator. The [[work]] calculator uses force times distance, not area. Underwater pressure adds ρgh — combine this tool with density and depth from your textbook for fluid statics problems.
Common uses
- Fluid statics and hydraulic homework
- Comparing foot pressure with different shoe areas
- Engineering estimates for pistons and bearings
- Atmospheric and vacuum intro problems
- Checking syringe or hydraulic jack force spread
Frequently asked questions
What pressure does 500 N exert on 0.01 m²?
P = 500 / 0.01 = 50,000 Pa = 50 kPa. Enter force 500 and area 0.01. The calculator shows both Pa and kPa.
How do you convert pascals to atm?
Divide by 101,325. Example: 101,325 Pa = 1 atm. The ideal gas calculator also shows pressure in atm for gas problems.
Why does a sharp knife cut more easily?
Same force on a smaller area gives higher pressure (P = F/A). A thin edge has tiny contact area, so pressure at the blade is large.
What units should area be in for P = F/A?
Square metres (m²). Convert cm² to m² by dividing by 10,000. Example: 100 cm² = 0.01 m².