Convert atmospheres to kilopascals

1 atm=101.325kPa

Use the converter below to change any atmospheres value into kilopascals instantly — with formula, conversion table, and real-world examples.

You have

Equals

101.325

Conversion formula

Forward

kilopascals = atmospheres × 101.325

Reverse

atmospheres = kilopascals × 0.009869

Example: 10 atm × 101.325 = 1,013.25 kPa.

About both units

From

Atmosphere

atm

The standard atmosphere equals 101,325 pascals exactly — defined by CGPM in 1954. Represents average sea-level atmospheric pressure. Used in chemistry, aviation and engineering as a reference pressure.

Real-world: Sea-level pressure: 1 atm. Mount Everest summit: ~0.33 atm. Submarine at 100 m: ~11 atm.

Read full atmosphere reference →

Kilopascal

kPa

The kilopascal equals 1000 pascals. Used for tyre pressures in many metric countries, engineering pressures and weather reports. 100 kPa ≈ 1 bar ≈ atmospheric pressure.

Real-world: Tyre pressure: 220–280 kPa. Atmospheric: 101 kPa. HVAC duct static: 0.1–0.3 kPa.

Read full kilopascal reference →

Atmosphere to Kilopascal conversion table

Common atmospheres to kilopascals values for quick reference.

Atmosphere (atm)	Kilopascal (kPa)
1 atm	101.325 kPa
5 atm	506.625 kPa
10 atm	1,013.25 kPa
25 atm	2,533.13 kPa
50 atm	5,066.25 kPa
100 atm	10,132.5 kPa
200 atm	20,265 kPa
500 atm	50,662.5 kPa
1,000 atm	101,325 kPa
5,000 atm	506,625 kPa

Tips & common mistakes

Quick tips

1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi.
Note: atm ≠ bar. Close but not identical.
Modern SI prefers pascals; atm is a legacy reference.

Avoid these

Using 1 atm = 1 bar exactly — off by 1.3%.
Confusing standard atm with technical atmosphere (98,066.5 Pa) or atmosphere-absolute in diving.
Applying 1 atm outside sea level without correction.

Frequently asked questions

How many kilopascals in a atmosphere?

One atmosphere equals 101.325 kilopascals.

How do I convert atmospheres to kilopascals?

Multiply the atmosphere value by 101.325 to get the equivalent in kilopascals.

What is 100 atmospheres in kilopascals?

100 atmospheres equals 10,132.5 kilopascals.

Is a atmosphere bigger than a kilopascal?

Yes. 1 atmosphere equals 101.325 kilopascals, so one atmosphere is larger.

How to convert atmospheres to kilopascals without a calculator?

Multiply by 101.33 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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