Convert Atmospheres to Kilopascals
1 standard atmosphere is 101.325 kPa. One standard atmosphere is exactly 101.325 kilopascals.
One standard atmosphere is 101.325 kilopascals. To convert atmospheres to kilopascals, multiply by 101.325; to go the other way, divide by 101.325 or multiply by 0.0098692327. The factor is exact rather than rounded: it follows from NIST Special Publication 811.
Factor checked against the defining standard · How we check
- Atmospheres × 101.325
value * 101.325101.325 kPa
1 standard atmosphere in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch | 14.69594878 psi | × 14.6959487755 |
| bars | 1.01325 bar | × 1.01325 |
| pascals | 101,325 Pa | × 101,325 |
| kilopascals | 101.325 kPa | × 101.325 |
| megapascals | 0.101325 MPa | × 0.101325 |
| atmospheres (as entered) | 1 atm | — |
| torr | 760 Torr | × 760 |
| inches of mercury | 29.9212524 inHg | × 29.9212524019 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert atmospheres to kilopascals?
- 1.Take the measurement in atmospheres.
- 2.Multiply by 101.325 — that is how many kilopascals fit in one standard atmosphere.
- 3.To go back the other way, divide by 101.325, or multiply by 0.0098692327.
Worked example: 25 atmospheres to kilopascals
- Formula
- atm × 101.325 = kPa
- Arithmetic
- 25 × 101.325 = 2,533.125 kPa
- Answer
- 25 atm = 2,533.125 kPa
The factor is exact, so this figure is exact too — only the display is rounded.
Atmospheres to kilopascals conversion table
| Atmospheres | Kilopascals |
|---|---|
| 1 atm | 101.325 kPa |
| 2 atm | 202.65 kPa |
| 3 atm | 303.975 kPa |
| 4 atm | 405.3 kPa |
| 5 atm | 506.625 kPa |
| 6 atm | 607.95 kPa |
| 7 atm | 709.275 kPa |
| 8 atm | 810.6 kPa |
| 9 atm | 911.925 kPa |
| 10 atm | 1,013.25 kPa |
| 12 atm | 1,215.9 kPa |
| 15 atm | 1,519.875 kPa |
| 20 atm | 2,026.5 kPa |
| 25 atm | 2,533.125 kPa |
| 50 atm | 5,066.25 kPa |
| 100 atm | 10,132.5 kPa |
| 200 atm | 20,265 kPa |
| 300 atm | 30,397.5 kPa |
| 500 atm | 50,662.5 kPa |
| 1000 atm | 101,325 kPa |
| 2000 atm | 202,650 kPa |
| 5000 atm | 506,625 kPa |
| 10000 atm | 1,013,250 kPa |
What is a standard atmosphere?
Exactly 101,325 pascals by definition, not by measurement — it was fixed as a reference, and the real pressure outside your window is never precisely it.
What is a kilopascal?
A thousand pascals, and the unit metric tyre placards and weather stations use. Atmospheric pressure at sea level is about 101 kPa.
How many kilopascals are in a standard atmosphere?
One standard atmosphere is 101.325 kilopascals, exactly. Going the other way, one kilopascal is 0.0098692327 atmospheres. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every pressure unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Pounds per square inch | psi | 6894.7573 pascal |
| Bars | bar | 100000 pascal |
| Pascals | Pa | the base unit |
| Kilopascals | kPa | 1000 pascal |
| Megapascals | MPa | 1000000 pascal |
| Atmospheres | atm | 101325 pascal |
| Torr | Torr | 133.32237 pascal |
| Inches of mercury | inHg | 3386.389 pascal |
Questions people actually ask
- How many kilopascals are in a standard atmosphere?
- 101.325. A thousand pascals, and the unit metric tyre placards and weather stations use. Atmospheric pressure at sea level is about 101 kPa.
- How do I convert kilopascals back to atmospheres?
- Divide by 101.325, or multiply by 0.0098692327 — they are the same operation.
Other pressure conversions
Kilopascals to atmospheres — the same conversion the other way.