Pounds per Square Inch Calculator

Find pressure in psi from a force and area.

Pressure (psi) 20

Pressure (kPa) 137.9

Formula: psi = force ÷ area

Step-by-step with your numbers:

1. Values used:

2. Force = 500 lbf

3. Area = 25

5. Pressure = Force / Area = 500 / 25 = 20psi

6. Pressure = 137.9kPa

Did we solve your problem today?

Pounds per square inch (psi) measures pressure as force spread over an area.

The math behind it

psi = force (lbf) ÷ area (in²). One psi ≈ 6.895 kPa.

500 lbf over 25 in² → 20 psi.

Is psi the same as bar?

No — 1 bar ≈ 14.5 psi.