Atmospheres to kilopascals
Type a value in atmospheres to see it in kilopascals straight away, or type in the second box to convert back.
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How to use it
- Type the value in the atmospheres box.
- Read the result in kilopascals as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
kPa = atm × 101.325
Multiply the value in atmospheres by 101.325 to get kilopascals.
Example
To convert 25 atm to kilopascals: 25 × 101.325 = 2,533.13 kPa.
Conversion table
| Atmospheres (atm) | Kilopascals (kPa) |
|---|---|
| 1 | 101.325 |
| 2 | 202.65 |
| 3 | 303.975 |
| 5 | 506.625 |
| 10 | 1,013.25 |
| 20 | 2,026.5 |
| 25 | 2,533.13 |
| 50 | 5,066.25 |
| 100 | 10,132.5 |
| 250 | 25,331.3 |
| 500 | 50,662.5 |
| 1,000 | 101,325 |
About the units
- Atmosphere
- The standard atmosphere, defined as exactly 101,325 pascals.
- Kilopascal
- Exactly 1000 pascals, widely used for tyre pressure and engineering systems.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilopascals are in one atmosphere?
1 atm = 101.325 kPa exactly.
How do I convert atmospheres to kilopascals?
Use kPa = atm × 101.325. For example, 25 atm = 2,533.13 kPa.
How many atmospheres are in one kilopascal?
1 kPa = 0.00986923 atm.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured from the surrounding air pressure, while absolute pressure starts from a perfect vacuum. These converters change the unit only, so a gauge reading stays a gauge reading.
Are torr and mmHg the same?
Almost. One torr is 101325/760 Pa, about 133.322368 Pa, and one conventional mmHg is 133.322387 Pa, a difference of less than one part per million. For everyday use you can treat them as equal.