Altitude Pressure Calculator
Calculate air pressure at an altitude with the standard atmosphere formula.
Quick answer: enter your details below and click Calculate Pressure — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your values in the fields provided.
- Click Calculate Pressure.
- Read the result and adjust an input if you want a different outcome.
About this tool
Air pressure falls as you climb, roughly following the standard atmosphere curve. Enter an altitude in metres and this tool calculates the pressure in hectopascals from the barometric formula.
Frequently asked questions
What do I enter to get a result?
Fill in every field with your own numbers or choices, then run the tool. Empty number fields count as zero, so check them before you trust the output.
Can I reuse this result elsewhere?
Yes. The result is calculated in your browser from the values you entered, so you can copy the numbers into your own notes or plan.