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Pressure Converter - Convert Between Pa, Bar, PSI, ATM, mmHg Online Free
Convert between pascals, bars, PSI, atmospheres, mmHg, and torr.
What Is a Pressure Converter?
A pressure converter converts between different pressure measurement units instantly.
Supported Units
- Pascal (Pa) — SI unit. 1 Pa = 1 N/m2.
- Kilopascal (kPa) — 1000 Pa.
- Bar — 100,000 Pa.
- Atmosphere (atm) — 101,325 Pa.
- PSI — 6894.76 Pa. US standard.
- mmHg — 133.322 Pa. Blood pressure.
- Torr — ~133.322 Pa. Vacuum science.
How Does Pressure Converter Work?
1 atm = 101,325 Pa = 14.696 psi = 760 mmHg = 1.01325 bar.
How to Use This Tool
- Enter a numeric value — Type the measurement you want to convert.
- Select the source unit — Choose the unit you are converting from.
- Read the results — The tool instantly displays equivalents in every supported unit.
Try our Power Converter or Energy Converter.
Use Cases
Science
Convert for experiments and protocols.
Engineering
Convert for hydraulic/pneumatic systems.
Medical
Convert blood pressure readings.
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Privacy
All calculations are performed entirely in your browser using JavaScript. No data is sent to our servers. We do not store, log, or share any values you enter.
mmHg and torr assume standard gravity and 0C.
AI Overview
A pressure converter converts between Pa, kPa, bar, atm, psi, mmHg, and torr.
Quick Answers
1 bar in PSI?
A:~14.504.
1 atm in Pa?
A:Exactly 101,325.
Normal blood pressure?
A:~120/80 mmHg.
How to Use the Pressure Converter - Convert Between Pa, Bar, PSI, ATM, mmHg Online Free
- Type the pressure value you want to convert into the input field. Decimals and large numbers are supported.
- Choose your starting unit from the dropdown menu - for example pascals (Pa), bar, or psi.
- See the value converted into every supported unit instantly, including torr, ksi, or MPa.
Benefits
- Instant Multi-Unit Conversion
- Multiple Unit Systems
- 100% Free to Use
- Works on Any Device
Common Mistakes
- PSI is ~6895x larger than Pa
- 1 bar ~ slightly less than 1 atm
- mmHg and torr are nearly identical
- Gauge vs absolute pressure matters
Professional Tips
- 1 atm ~ 1 bar ~ 14.7 psi ~ 760 mmHg
- Tire pressure in PSI (US) or bar (Europe)
- Blood pressure in mmHg worldwide
- Weather in hPa (= mbar)
Common Use Cases
Science
Convert for experiments.
Engineering
Convert for hydraulic systems.
Medical
Convert blood pressure.
Weather
Convert barometric pressure.
Related Concepts
Pascal (Pa)
SI unit. 1 Pa = 1 N/m2.
Kilopascal (kPa)
1000 Pa.
Bar
100,000 Pa.
Atmosphere (atm)
101,325 Pa.
PSI
6894.76 Pa. US standard.
mmHg
133.322 Pa. Blood pressure.
Torr
~133.322 Pa. Vacuum science.
Frequently Asked Questions
References
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