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Atmospheres to Kilopascals (atm to kPa) Converter

1 atmosphere (atm) = 101.325 kilopascals (kPa). To convert atmospheres to kilopascals, multiply by 101.325: 25 atm × 101.325 = 2,533.13 kPa.

1 atm = 101.325 kPa
Convert the other way: Kilopascals to Atmospheres

Quick facts

How to convert atmospheres to kilopascals

  1. Take the value in atmospheres.
  2. Multiply it by 101.325 (the number of kilopascals in one atmosphere).
  3. Round the result to the precision you need.
kPa = atm × 101.325

Worked example: 25 atm × 101.325 = 2533.13 kPa.

To convert kilopascals back to atmospheres, multiply by 0.00986923, or divide by 101.325.

Source: NIST SP 811 (2008), Appendix B.

Atmospheres to Kilopascals conversion table

Atmospheres to Kilopascals conversion table
Atmospheres [atm]Kilopascals [kPa]
0.01 atm1.01325 kPa
0.1 atm10.1325 kPa
1 atm101.325 kPa
2 atm202.65 kPa
3 atm303.975 kPa
5 atm506.625 kPa
10 atm1013.25 kPa
20 atm2026.5 kPa
50 atm5066.25 kPa
100 atm10132.5 kPa
1000 atm101325 kPa

atm to kPa chart from 1 to 100

Kilopascals to Atmospheres conversion table

Kilopascals to Atmospheres conversion table
Kilopascals [kPa]Atmospheres [atm]
0.01 kPa0.0000986923 atm
0.1 kPa0.0009869233 atm
1 kPa0.0098692327 atm
2 kPa0.0197384653 atm
3 kPa0.029607698 atm
5 kPa0.0493461633 atm
10 kPa0.0986923267 atm
20 kPa0.1973846533 atm
50 kPa0.4934616334 atm
100 kPa0.9869232667 atm
1000 kPa9.8692326672 atm

Atmospheres vs Kilopascals

AtmosphereKilopascal
SymbolatmkPa
Equals1 atm = 101.325 kPa1 kPa = 0.00986923 atm

What is an atmosphere?

Defined as standard atmospheric pressure at sea level. Used as a reference pressure in science and diving.

What is a kilopascal?

Equal to 1,000 pascals. Used for tire pressure and weather pressure outside the US.

Frequently asked questions

How many kilopascals are in an atmosphere?

There are 101.325 kilopascals in 1 atmosphere (1 atm = 101.325 kPa).

How many atmospheres are in a kilopascal?

There are 0.00986923 atmospheres in 1 kilopascal (1 kPa = 0.0098692327 atm).

How do I convert atmospheres to kilopascals?

Multiply the number of atmospheres by 101.325. For example, 10 atm × 101.325 = 1,013.25 kPa. To convert back, multiply by 0.00986923.

What is 10 atm in kilopascals?

10 atm = 1,013.25 kPa.

What is 100 atm in kilopascals?

100 atm = 10,132.5 kPa.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026