Calculadora de Pressão Online Grátis
Pressure from force and area with unit conversions (Pa, PSI, bar, atm)
The Pressure Calculator computes pressure from force and area, or solves for force or area when pressure is known, with instant conversion between Pascals, PSI, bar, kPa, MPa, and atmospheres. Civil engineers calculating bearing pressures, HVAC engineers sizing systems, and hydraulics technicians verifying system pressures use it to cross-check specifications and convert between unit systems.
Frequently Asked Questions
Sobre Esta Calculadora
Pressure — force distributed over area — appears in structural engineering (soil bearing pressures under foundations), fluid mechanics (pipe system pressures), pneumatics (compressed air systems), and HVAC (duct static pressures). The same physical quantity is expressed in wildly different units depending on the discipline: geotechnical engineers use kPa, pipeline engineers use bar, American mechanical systems use PSI, and physics uses Pascals.
This calculator solves P = F/A in any direction and converts the result to all major pressure units simultaneously. Structural engineers use it to check whether a proposed footing area distributes column loads within the soil's allowable bearing capacity. Hydraulic engineers use it to verify that system operating pressures stay below component pressure ratings.
For fluid pressure specifically, the hydrostatic equation P = ρgh gives pressure from fluid density, gravity, and depth — a separate but related calculation. The Density Calculator provides the ρ (density) input if you're working with non-water fluids, making the two tools complementary for piping and tank design.
A Calculadora de Pressão calcula a pressão a partir da força e área, com conversão instantânea de unidades.
Fórmula
Pressure = Force / Area
Exemplo Resolvido
Calculating soil bearing pressure under a column footing
Entradas:
- Column load: 250 kN (kilonewtons)
- Footing dimensions: 1.5 m × 1.5 m
Passo a Passo:
- Footing area = 1.5 × 1.5 = 2.25 m²
- Pressure = Force ÷ Area = 250,000 N ÷ 2.25 m² = 111,111 Pa
- Convert to kPa: 111,111 ÷ 1,000 = 111.1 kPa
- Compare to allowable bearing capacity of soil: typical stiff clay ≈ 100–200 kPa
- Bearing pressure (111.1 kPa) is within allowable range for stiff clay — footing is adequate