Pressure Calculator (P = F/A)
Pressure as force divided by area, in pascals and kilopascals.
Result
Pressure (Pa)
50.00
Pressure (kPa)
0.0500
How it works
Pressure is force spread over area: P = F ÷ A, measured in pascals (one newton per square metre). Press with 100 N on 0.01 m² and you produce 10,000 Pa, or 10 kPa. The area in the denominator is what makes pressure so counterintuitive. The same force concentrated on a small area produces enormous pressure — which is why a drawing pin pushes into wood under thumb force, while the same hand pressing flat does nothing. Snowshoes work the other way: identical weight, much larger area, so you no longer sink. The pascal is a small unit, so real quantities appear with prefixes: atmospheric pressure is about 101 kPa, car tyres run around 220 kPa, and a deep dive reaches megapascals. Blood pressure keeps its own historical unit, the millimetre of mercury, purely by medical convention.
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Frequently asked questions
What is a pascal?
One newton of force per square metre — the SI unit of pressure.
Why does area matter?
Smaller area concentrates the force, raising pressure; larger area spreads it out.
What is the difference between absolute and gauge pressure?
Gauge pressure is measured relative to the surrounding air, absolute pressure from a true vacuum. A tyre gauge reading 220 kPa means 220 above atmospheric — about 321 kPa absolute.
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