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. The same amount is also shown in bar, psi, mmHg.
3. To go from standard atmospheres back to kilopascals, type into the Standard atmospheres field instead. Every field also has a unit menu with all 18 pressure units, for example Pa, MPa, GPa, hPa, bar, mbar, psi, ksi, psf, mmHg, Torr.

Results update as you type, and everything is calculated in your browser.

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, for example 202.65 kPa is 2 atm.

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

Pressure units explained

Kilopascal (kPa)

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.

Standard atmosphere (atm)

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.