Atmospheres to Pascals
Convert atmospheres to pascals instantly. 1 atm = 101,325 Pa. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert atmospheres to pascals
To convert atmospheres to pascals, multiply by 101,325. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
Pa = atm × 101,325
Atmospheres to Pascals conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Atmospheres | Pascals |
|---|---|
| 1 atm | 101,325 Pa |
| 2 atm | 202,650 Pa |
| 3 atm | 303,975 Pa |
| 5 atm | 506,625 Pa |
| 10 atm | 1,013,250 Pa |
| 20 atm | 2,026,500 Pa |
| 25 atm | 2,533,125 Pa |
| 50 atm | 5,066,250 Pa |
| 100 atm | 10,132,500 Pa |
| 500 atm | 50,662,500 Pa |
| 1,000 atm | 101,325,000 Pa |
What is a atmosphere?
The standard atmosphere, defined as exactly 101,325 Pa.
What is a pascal?
The SI unit of pressure: one newton per square metre.
The formula
Pa = atm × 101,325
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Atmospheres to Pascals
- Type the number of atmospheres you want to convert.
- Read the result in pascals straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked pascals to atmospheres page.
Atmospheres to Pascals — frequently asked questions
How many pascals are in a atmosphere?
One atmosphere equals 101,325 Pa. Pa = atm × 101,325
What is the formula to convert atmospheres to pascals?
The formula is Pa = atm × 101,325. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert pascals back to atmospheres?
Divide instead of multiplying: one pascal is 9.86923e-06 atm. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this atmospheres to pascals free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error