Physics formula
How to calculate pressure
Pressure measures how much force is applied to each unit of area.
Direct answer
Formula
P = F / A
Use the table below to match each symbol with the right input. Keep units consistent before you start.
Pressure formula
Start here when you only need the equation and variable names.
Formula
P = F / A
Pressure measures how much force is applied to each unit of area.
Variable meanings
Check each symbol, meaning, and unit before you calculate.
| Symbol | Name | Description | Unit |
|---|---|---|---|
| P | Pressure | Force per unit area. | Pa |
| F | Force | Applied force. | N |
| A | Area | Contact area. | m^2 |
When to use this formula
Check that your situation matches the formula before you trust the result.
- Fits solids, surfaces, and simple force-over-area questions.
Step-by-step method
Follow these steps when you are solving it by hand.
- 1Convert force to newtons.
- 2Convert area to square meters.
- 3Divide force by area.
- 4Report the answer in pascals.
Examples
These sample numbers show the order of operations and units.
Small plate
F
500 N
A
0.25 m^2
- 1.P = 500 / 0.25
- 2.P = 2000 Pa
Result
The pressure is 2,000 Pa.
Wide platform
F
1,200 N
A
3 m^2
- 1.P = 1200 / 3
- 2.P = 400 Pa
Result
The pressure is 400 Pa.
Mistakes to avoid
Small input or unit errors can change the answer a lot.
- Mixing metric and imperial units before solving the pressure formula.
- Forgetting squared units such as m^2, m/s^2, or velocity squared.
- Dropping negative signs when direction matters.
- Rounding measured values too early in the calculation.
Open the Physics Pressure Calculator
Open the calculator for the answer without rewriting the formula.
Enter your values in the related calculator, then compare the output with the hand method above.
Open Physics Pressure CalculatorFAQs
Short answers for common formula questions.
Can I calculate Pressure by hand?
Yes. Write the units next to each value, convert rates or measurements first, and round only the final answer.
Why does my Pressure result differ from another calculator?
Most differences come from rounding, unit conversions, rate timing, or a slightly different version of the formula.
When is the Pressure Calculator better than hand math?
Open the Pressure Calculator to check several scenarios or skip the hand arithmetic.