Pressure Converter
Pressure conversion workspace
Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.
Batch conversionconvert up to 100 values at once
No values yet.
Compare all pressure units
One input, every supported equivalent. Select any row as the main target.
| Unit | Equivalent | Target action |
|---|---|---|
| Pascals Pa | 1 | SourceSource |
| Kilopascals kPa | 1E-3 | TargetSelected |
| Bar bar | 1E-5 | |
| Pounds per Square Inch psi | 1.45E-4 | |
| Atmospheres atm | 9.87E-6 |
Pressure is force distributed over an area.
Sourced factorsFormula
value in target = value × source factor / target factor
Calculations use the central unit catalog and preserve precision until the result is formatted.
Common conversions
| Input | From | To | Result |
|---|---|---|---|
| 1 | Atmospheres | Pascals | 101,325 |
Frequently asked questions
How are bar and standard atmosphere defined in pascals?
One bar equals exactly 100,000 pascals. One standard atmosphere equals exactly 101,325 pascals, so the two units are close but not equal.
Are the results rounded?
The calculation retains full JavaScript number precision; the precision control only formats the displayed result.
Accuracy & transparency
Sources & methodology
Calculations keep full numeric precision until display formatting. These references describe the definitions, variants or factors used; links do not imply affiliation.
SI definitions and published coefficients for selected non-SI units.
Reference factors and named variants for commonly used units, including US liquid cooking measures and British stone.
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