Calculadora de Pressão
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
P = F/A
About this calculator
The pressure calculator determines the pressure exerted by a force on a specific area using the formula P = F/A. Pressure is a fundamental physical quantity that measures force distribution per unit area, expressed in pascals (Pa) in the International System. This tool is useful for understanding how concentrated or distributed forces affect surfaces in everyday and technical contexts.
The calculation is straightforward: enter the force value (in newtons) and the area (in square meters), and the calculator returns the resulting pressure. For example, a force of 100 N applied over an area of 2 m² yields a pressure of 50 Pa. The tool also allows conversion between common units such as atmospheres, mmHg, or psi, making it applicable in various fields.
When to use? Situations like calculating gas pressure in a container, the pressure exerted by an object on the ground, or in engineering projects involving load distribution. It is useful for physics students, engineers, technicians, and anyone needing to solve static or fluid dynamics problems.
Care: ensure force and area units are consistent. The area is the total surface over which the force is applied, not just a part. For inclined surfaces, use the perpendicular component of the force. Remember that standard atmospheric pressure at sea level is 101325 Pa, and variations can be relevant in precise calculations.
Frequently asked questions
What is the difference between pressure and force?
Force is an interaction that can change an object's motion, while pressure is force distributed per unit area. For example, the same force applied over a smaller area creates higher pressure.
Can I use this calculator for liquid pressure?
Yes, if you know the force exerted by the liquid on the area. For hydrostatic pressure, use the formula P = ρgh, which considers density, gravity, and height.
How do I convert the result to other units?
The calculator gives the result in pascals. For conversion, use factors: 1 atm = 101325 Pa, 1 mmHg = 133.322 Pa, 1 psi = 6894.76 Pa.
What if the area is very small?
Very small areas result in high pressures. Ensure proper units and consider safety limits, especially in applications like presses or needle tips.
Can pressure be negative?
In common contexts, pressure is always positive (compressive force). Negative pressure can occur in tensile situations but is usually treated as stress. The calculator assumes positive force values.