Force per unit area

Pressure Calculator

Solve pressure, force, or area using P = F ÷ A.

Enter two known values

Solve a pressure problem

Free tool
Pa

This is the value being calculated.

N

Positive force applied to the surface.

Positive surface area over which force acts.

Use pascals for pressure, newtons for force, and square meters for area.

Try an example:

Your pressure result will appear here

Choose the missing variable and enter the other two known values.

Physics overview

What is pressure?

Pressure measures how much force acts over a given area. The same force produces greater pressure when it is concentrated over a smaller surface.

Formula

Pressure formula

PressureP = F ÷ A

  • P is pressure in pascals.
  • F is force in newtons.
  • A is area in square meters.

Worked example

A 500 N force acts over 2 m²

  1. Write the formula: P = F ÷ A.
  2. Substitute the values: P = 500 ÷ 2.
  3. Calculate the pressure: P = 250 Pa.

Rearranged equations

Solve for force or area

Force

F = P × A

Multiply pressure by area.

Area

A = F ÷ P

Divide force by pressure.

Units

Standard SI units

Use pascals for pressure, newtons for force, and square meters for area. One pascal is equal to one newton per square meter.

Real-world applications

Where pressure calculations are used

  • Contact pressure between solid surfaces.
  • Mechanical loads acting on plates and supports.
  • Hydraulic and pneumatic systems.
  • Laboratory force and area experiments.

Calculation limits

Important assumptions

  • Pressure, force, and area must be greater than zero.
  • Force is assumed to act evenly over the stated area.
  • Area should be measured in square meters for a result in pascals.
  • The calculator does not automatically convert units.

Questions and answers

Pressure calculator FAQ

What formula does the pressure calculator use?

It uses P = F ÷ A, where pressure equals force divided by area.

What is the SI unit of pressure?

The SI unit of pressure is the pascal, written as Pa. One pascal equals one newton per square meter.

How do you calculate force from pressure?

Multiply pressure by area using F = P × A.

How do you calculate area from pressure?

Divide force by pressure using A = F ÷ P.

Accuracy and transparency

Created and maintained by our editorial team

This physics calculator is maintained by the Science Lab Tools Editorial Team. Its calculation logic is tested with representative inputs, while the supporting guidance is checked for formula clarity, units, assumptions, and common mistakes.

Learn more about our formula-review and correction process, or read about Science Lab Tools.

  • Calculation logic tested
  • Variables and units explained
  • Assumptions stated clearly
  • Corrections handled transparently