Pressure Converter
Pressure Converter translates Pa, kPa, bar, psi, and atm through pascals. The page treats all values as pressure differences on the same numeric scale; it does not distinguish absolute, gauge, or differential reference conventions. That reference must be supplied by the user and cannot be recovered from a unit symbol.
Runs locally — files stay on your deviceHow many pascals are in one standard atmosphere?
101,325 pascals.
Pressure is force per unit area
The pascal is one newton per square metre. The tool uses 1 bar = 100,000 Pa, 1 atm = 101,325 Pa, and 1 psi = 6894.757293 Pa.
How it works
The value is scaled to pascals and then divided by the destination factor.
Key concepts
Gauge versus absolute is a reference choice
Conversion factors alone cannot supply the missing reference pressure.
bar and atmosphere differ
1 bar is 100 kPa; 1 atm is 101.325 kPa.
When to use it
- Translate tyre-pressure units.
- Compare bar and kPa specifications.
- Convert a standard atmosphere reference.
When not to use it
- Do not mix gauge and absolute readings without atmospheric offset.
- Do not use the result as sensor calibration.
- Do not infer altitude or weather from a generic conversion.
Worked examples
Atmosphere
- Input
1 atm- Expected output
101.325 kPa
The standard atmosphere is exact.
Bar
- Input
1 bar- Expected output
100,000 Pa
Bar is a decimal multiple.
Tyre pressure
- Input
32 psi- Expected output
About 220.632 kPa
Reference remains gauge if the source reading was gauge.
Common mistakes
Mixing gauge and absolute
They have different zero references. Correction: Convert units and preserve the pressure reference.
Equating bar with atm
They differ by 1.325 kPa. Correction: Use the correct unit.
Treating conversion as calibration
Sensor bias and uncertainty remain. Correction: Calibrate with appropriate standards.
Best practices
- Write psia or psig when reference matters.
- Preserve sensor uncertainty.
- Confirm standard versus local atmospheric assumptions.
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Limitations and privacy
- No gauge-to-absolute offset calculation.
- No torr, mmHg, or specialized pressure units.
- No calibration or uncertainty model.
Values are converted locally in this browser and are not uploaded.
Frequently asked questions
Is 1 bar the same as 1 atm?
No.
How many Pa are in 1 bar?
100,000.
Can it convert gauge to absolute pressure?
Not without a reference offset.
What is a pascal?
One newton per square metre.