Pascals to Bars
Type a value in either box to convert between pascals and bars. The factor is 1e-05.
| Pascals | Bars |
|---|---|
| 1 Pa | 1e-05 bar |
| 2 Pa | 2e-05 bar |
| 3 Pa | 3e-05 bar |
| 5 Pa | 5e-05 bar |
| 10 Pa | 0.0001 bar |
| 25 Pa | 0.00025 bar |
| 50 Pa | 0.0005 bar |
| 100 Pa | 0.001 bar |
How to use
- Enter a value in the Pascals field.
- The Bars figure appears immediately — no button to press.
- Typing in the Bars field converts back to Pascals the same way.
- Use the reference table for the values that come up most often.
Pascals to Bars formula
The factor from pascals to bars is 1e-05.
bar = Pa × 1e-05
Read in reverse, one bar is exactly 100,000 pascals.
Why this factor: the pascal and the bar are both defined against the pascal, so dividing one definition by the other gives 1e-05 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-05 — or use the Bars to Pascals converter, which is the same calculation reversed.
Worked example
Given 100 Pa, multiplying by 1e-05 yields 0.001 bar.
100 Pa × 1e-05 = 0.001 bar
The converter above does this for any value you type, in either direction.
What is a pascal?
The pascal is the SI unit of pressure — one newton of force spread over one square meter.
Definition: Defined as 1 N/m². Named after Blaise Pascal.
Where it is used: Scientific and engineering pressure calculations, and weather pressure in hectopascals.
Worth knowing: A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
What is a bar?
A bar is a metric pressure unit chosen to sit very close to atmospheric pressure.
Definition: Exactly 100,000 pascals by definition. Standard atmosphere is 1.01325 bar, so a bar is slightly less.
Where it is used: European tire and hydraulic pressures, diving depth equivalents, and espresso machine ratings.
Worth knowing: Close to one atmosphere but not equal to it — the difference is about 1.3%.
Pascals vs Bars
The pascal is an SI unit while the bar is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many bars are in a pascal?
One pascal equals 1e-05 bars.
What is the formula to convert pascals to bars?
Multiply the number of pascals by 1e-05. To reverse it, divide by 1e-05 instead.
How do I convert bars back to pascals?
Divide by 1e-05, which is the same as multiplying by 100000.
How many bars are in 10 pascals?
10 Pa works out to 0.0001 bar.
Is there anything to watch out for with pascals?
A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
How is the pascal defined?
Defined as 1 N/m². Named after Blaise Pascal.