kPa to atm Converter

Divide kilopascals by 101.325 to get standard atmospheres. Useful in gas-law problems that give pressures in kPa.

How to use the kPa to atm Converter

1. Type the number of kilopascals into the Kilopascals field. Decimals such as 50.6625 are fine.
2. Read the answer in Standard atmospheres – it updates as you type, with no button to press.
3. To convert the other way, type into Standard atmospheres and the kilopascals are recalculated.
4. Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.

This page converts only kPa ⇄ atm. Need a different unit? Use the general pressure converter, where you can choose any “from” and “to” unit.

How it works

Both units measure pressure, so they are always in the same ratio: one kilopascal equals 0.0098692327 standard atmospheres. The calculator multiplies the number of kilopascals you type by 0.0098692327 to give standard atmospheres, and when you type into the standard atmospheres field it divides by the same factor to give kilopascals. Because the ratio never changes, doubling the kilopascals always doubles the standard atmospheres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

How to convert kilopascals to standard atmospheres

1. Write down the value in kilopascals, for example 101.325 kPa.
2. Multiply by the conversion factor 0.0098692327 (because 1 kilopascal = 0.0098692327 atm).
3. 101.325 × 0.0098692327 = 1 atm.
4. To go back from standard atmospheres to kilopascals, divide by 0.0098692327 – or multiply by 101.325.

kPa to atm conversion table

What is a kilopascal?

A kilopascal is 1,000 Pa. Tyre pressures in Canada and Australia, weather data and boiler gauges often use kPa; standard air pressure is 101.325 kPa.

What is a standard atmosphere?

The standard atmosphere is exactly 101,325 Pa, the average air pressure at sea level. Chemistry problems and diving depth calculations often use atm.

Quick mental conversion

For a fast estimate, multiply kilopascals by about 0.0099 to get standard atmospheres; the error is about 0.3%. Use the calculator above when you need the exact figure.

Common mistakes to avoid

Mixing gauge pressure (psig, barg) with absolute pressure (psia, bara), treating bar and atm as identical, and confusing kgf/cm² with bar.