Atmosphere to Kilopascal Converter (atm to kPa)
1 atmosphere equals 101.325 kilopascals — multiply the number of atmospheres by 101.325 to convert. This is the exact SI definition of the standard atmosphere in kilopascals.
The formula
To convert atmospheres to kilopascals, multiply by 101.325:
kPa = atm × 101.325
For example, 10 atm × 101.325 = 1013.25 kPa. To reverse it, divide by 101.325 (or multiply by 0.00986923).
Conversion table
| Atmospheres (atm) | Kilopascals (kPa) |
|---|---|
| 1 | 101.325 |
| 2 | 202.65 |
| 3 | 303.975 |
| 5 | 506.625 |
| 10 | 1013.25 |
| 25 | 2533.125 |
| 50 | 5066.25 |
| 100 | 10132.5 |
| 500 | 50662.5 |
| 1000 | 101325 |
How to convert online
- Type the number of atmospheres into the first box.
- Read the kilopascal value instantly in the second box.
- Enter a kPa value to convert back to atmospheres — it works both ways.
Use the Atmosphere to Kilopascal Converter — free and instant in your browser.
Where this conversion is used
Kilopascals are the standard SI pressure unit in engineering, meteorology and physics, while atmospheres are handy for expressing pressure relative to sea level. Converting is common in HVAC, chemistry, tyre and gas-cylinder specifications where kPa is the reporting unit.
FAQ
How many kilopascals are in an atmosphere?
One atmosphere equals 101.325 kPa. So 2 atm is 202.65 kPa and 100 atm is 10,132.5 kPa.
How do I convert kilopascals back to atmospheres?
Divide by 101.325, or multiply by 0.00986923. So 100 kPa is about 0.987 atm.
Is the conversion exact?
Yes. The standard atmosphere is defined as exactly 101.325 kPa, so no rounding is involved.
Is this converter free and private?
Yes. It runs entirely in your browser — nothing is uploaded or stored. It is free, needs no sign-up and works offline once loaded.
Related converters
- Kilopascal to Atmosphere Converter
- Atmosphere to Pascal Converter
- Atmosphere to Bar Converter
- Atmosphere to PSI Converter
Built by ByteVancer
ByteTools is a free product of ByteVancer, a software and web development studio. Need custom tools, web apps or automation for your business? ByteVancer can build it — take a look and get in touch.
Recommended reading
Bar to Atmosphere Converter (bar to atm)
1 bar equals 0.98692327 atmospheres. Use the exact factor, formula and reference table to convert bar to atm accurately.
Atmosphere to PSI Converter (atm to psi)
1 atmosphere equals 14.695949 psi. Use the exact factor, formula and reference table to convert atm to psi accurately.
Atmosphere to Pascal Converter (atm to Pa)
1 atmosphere equals 101,325 pascals. Use the exact factor, formula and reference table to convert atm to Pa accurately.
Atmosphere to Bar Converter (atm to bar)
1 atmosphere equals 1.01325 bar. Use the exact factor, formula and reference table to convert atm to bar accurately.