This converter turns atmospheres into kilopascals instantly, using the exact factor 1 atmosphere = 101.325 kilopascals. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Standard atmospheric pressure by definition — 101,325 pascals exactly. The standard tyre-pressure unit in metric countries.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
atmospheres- The amount you are converting, measured in atmospheres
101.325- The exact number of kilopascals in one atmosphere
kilopascals- The converted result
How it works, step by step
- Enter the number of atmospheres you want to convert.
- The value is multiplied by 101.325, the exact conversion factor.
- The result is displayed in kilopascals, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 atmospheres
Multiply 5 by 101.325. That gives 506.625 kilopascals. A quick sanity check: one atmosphere is larger than one kilopascal, so the number should get bigger — and it does.
Converting 72 atmospheres
72 × 101.325 = 7,295.4 kilopascals. Working backwards, 7,295.4 ÷ 101.325 returns 72 atmospheres, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many kilopascals are in one atmosphere?
Exactly 101.325. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert atmospheres to kilopascals?
Kilopascals = atmospheres × 101.325. To reverse it, divide instead: atmospheres = kilopascals ÷ 101.325, which is the same as multiplying by 0.009869232667.
Is the atmosphere bigger than the kilopascal?
Yes. One atmosphere equals 101.325 kilopascals, so it is the larger unit.
Why does my answer differ slightly from other atmospheres to kilopascals converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a atmosphere?
Standard atmospheric pressure by definition — 101,325 pascals exactly.
What is a kilopascal?
The standard tyre-pressure unit in metric countries.
Atmospheres to kilopascals reference table
| Atmospheres | Kilopascals |
|---|---|
| 0.5 atm | 50.6625 kPa |
| 1 atm | 101.325 kPa |
| 2 atm | 202.65 kPa |
| 3 atm | 303.975 kPa |
| 5 atm | 506.625 kPa |
| 10 atm | 1,013.25 kPa |
| 15 atm | 1,519.88 kPa |
| 20 atm | 2,026.5 kPa |
| 25 atm | 2,533.12 kPa |
| 50 atm | 5,066.25 kPa |
| 75 atm | 7,599.38 kPa |
| 100 atm | 10,132.5 kPa |
| 250 atm | 25,331.25 kPa |
| 500 atm | 50,662.5 kPa |
| 1000 atm | 101,325 kPa |
Exact factor: 1 atmosphere = 101.325 kilopascals. Values rounded for display.