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Pressure
Atmospheres to Kilopascals
Convert atmospheres (atm) to kilopascals (kPa). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 atm = 101.33 kPa
Atmospheres to Kilopascals Conversion Table
Common values, ready to copy:
| atmospheres | kilopascals |
|---|---|
| 1 atm | 101.33 kPa |
| 2 atm | 202.65 kPa |
| 5 atm | 506.63 kPa |
| 10 atm | 1013.25 kPa |
| 25 atm | 2533.13 kPa |
| 50 atm | 5066.25 kPa |
| 100 atm | 10132.5 kPa |
| 1,000 atm | 101325 kPa |
Formula
kilopascals = atmospheres × 101.325
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About Atmospheres and Kilopascals
Atmospheres (atm): Originally the average atmospheric pressure at sea level (101,325 Pa exactly); replaced in scientific work by the kilopascal but still used in chemistry and physiology. Common uses: Chemistry (gas-phase reactions, vapor pressure references), diving (depth pressure in atmospheres of seawater), and some compressed-gas contexts.
Kilopascals (kPa): A thousand pascals; the practical SI pressure unit for atmospheric and engineering work. Common uses: Weather reports (atmospheric pressure in kPa, where standard sea-level pressure is about 101 kPa), tire pressure in many countries, and structural engineering.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is kilopascals = atmospheres × 101.325, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between atmospheres and kilopascals comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.