This calculator finds pressure from a force and the area it acts on. The same force on a smaller area produces higher pressure — which is why sharp knives cut and snowshoes stop you sinking.
What the symbols mean
- P — pressure (pascals).
- F — force (newtons).
- A — area (square metres).
Worked example
A 200 N force pressing on 0.5 m² gives a pressure of 200 / 0.5 = 400 Pa. Concentrate that same force onto 0.01 m² and the pressure leaps to 20,000 Pa.
Want the full story? Read our guide: Density and Pressure.
How the formula works
Pressure is force spread over area. Because it is force divided by area, shrinking the area raises the pressure even when the force stays the same. In fluids, pressure also increases with depth as the weight of fluid above grows.
Common mistakes to avoid
- Wrong area units. Use square metres for an answer in pascals.
- Confusing force and pressure. The same force gives different pressures depending on the area.
Where it is used
Pressure governs hydraulics, weather systems, blood pressure, tyre inflation, diving, and the design of pipes and pressure vessels.