Calculator
What the Pascal Converter does
Pascal Converter: 1 Pa = 0.00001 bar, so multiply a pascal value by 0.00001 to get bar, or divide to go back. Example: 1 Pa = 0.00001 bar.
Feed it Value, From and To; it hands back Result, How it was calculated and Reverse conversion. Everything recomputes live, which makes it easy to test a few scenarios in a row.
Unit mistakes are quietly expensive. They have wrecked spacecraft and ruined recipes alike. The Pascal Converter exists to take that particular chore off your hands.
Your data stays on your machine. Once the page has loaded you could disconnect entirely and it would still work.
Below the tool you will find the field reference, the method, and an example computed from the values it opens with.
What do the Pascal Converter fields mean?
The Pascal Converter uses 3 inputs. The fields arrive populated, which makes it easy to nudge a single figure and watch what moves.
| Field | What to enter | Default |
|---|---|---|
| Value | required | 1 |
| From | choose from Pascal (Pa), Hectopascal (hPa), Kilopascal (kPa), Megapascal (MPa), Bar (bar) or Millibar (mbar) | Pascal (Pa) |
| To | choose from Pascal (Pa), Hectopascal (hPa), Kilopascal (kPa), Megapascal (MPa), Bar (bar) or Millibar (mbar) | Bar (bar) |
How does the Pascal Converter work?
Both units are converted through pressure's base unit (Pa), so any of the 12 units in the dropdowns can be paired in either direction without loss of accuracy.
Exact definitions are preferred throughout: the metre, the inch and the pound all have them. Only where a unit depends on a measured constant is an accepted published value substituted.
Worked example
These are the values the Pascal Converter loads by default, and the result it produces from them. The numbers below come straight from the default inputs, so you can verify them against the live tool.
| Value | 1 |
|---|---|
| From | Pascal (Pa) |
| To | Bar (bar) |
| Result | 0.00001 bar |
|---|---|
| How it was calculated | 1 Pa = 0.00001 bar, so 1 × 0.00001 = 0.00001 bar |
| Reverse conversion | 100000 Pa (if you meant 1 bar) |
The pascal
The pascal (Pa), the SI unit of pressure, is defined as exactly 1 newton per square metre: a genuinely tiny unit for everyday pressures, which is why kilopascals or hectopascals are almost always used in practice instead of raw pascals.
Worth knowing
- Standard atmospheric pressure at sea level is about 101,325 Pa (101.325 kPa). A single pascal is roughly one hundred-thousandth of the air pressure around you right now, illustrating just how small the base unit is.
- Meteorologists almost universally report atmospheric pressure in hectopascals (hPa), which happen to be numerically identical to the older millibar unit (1 hPa = 1 mbar exactly). Weather reports switched terminology over the decades without the underlying number changing.
- Named after 17th-century scientist Blaise Pascal for his work on fluid pressure and vacuums, the unit was formally adopted into the SI system in 1971.
Definitions: BIPM SI Brochure · NIST reference on units
How to use it
- Type Value.
- Pick a value for From: the options are Pascal (Pa), Hectopascal (hPa), Kilopascal (kPa), Megapascal (MPa), Bar (bar) or Millibar (mbar).
- Pick a value for To: the options are Pascal (Pa), Hectopascal (hPa), Kilopascal (kPa), Megapascal (MPa), Bar (bar) or Millibar (mbar).
- The results panel stays in sync with the form as you edit it.
- Look at Result, How it was calculated and Reverse conversion in the output panel.
- To keep the result, either copy the link or print the page. Both preserve what is on screen.
What this tool does not do
- Factors use the internationally agreed definitions; some industries round them differently.
- Repeated conversions compound rounding, so convert once from the original value where you can.
- There is no history: reload the page and the previous run is gone.
- Nothing here can catch a correct number entered in the wrong field.
Frequently asked questions
You need Value, From and To. Defaults are loaded for all of them, so you can change one value at a time and watch how the result responds.
With the values loaded when the page opens, result comes out as 0.00001 bar. Try changing one value. The answer refreshes without a page reload.
No. Your browser is doing the computing, so we could not see the values even if we wanted to.
It is free with no conditions: no sign-up, and no limit on how often you use it.
The computation is exact; how much you should trust the answer depends on how good your inputs are.