Pressure Converter: Pascal, Bar, PSI, atm
Convert pressure units — Pascals, bar, PSI, atmospheres, mmHg, and inHg.
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Pressure Converter: Pascal, Bar, PSI, atm Pressure — force per unit area — is measured in different units across different domains. Engineers use bar or PSI, scientists use pascals, meteorologists use millibars or hectopascals, and doctors use mmHg. Converting fluently between them prevents errors in everything from tire inflation to hydraulic system design. --- What about Pressure: The Physical Definition? Pressure = Force ÷ Area. The SI unit is the pascal (Pa), named after Blaise Pascal: 1 Pa = 1 N/m² One pascal is tiny — roughly the pressure from a dollar bill lying flat on a table. Practical applications use kilopascals (kPa), megapascals (MPa), bar, or PSI. What about The Main Pressure Units? | Unit | Symbol | Definition | |---|---|---| | Pascal | Pa | 1 N/m² (SI unit) | | Kilopascal…
Frequently Asked Questions
How do I convert PSI to bar?
Multiply PSI by 0.0689476. For example, 30 PSI × 0.0689476 = 2.068 bar. Inverse: multiply bar by 14.5038 to get PSI. Practical shortcut: 1 bar ≈ 14.5 PSI, so multiply bar by 14.5 for a quick estimate.
What is atmospheric pressure in Pascals?
Standard atmospheric pressure is exactly 101,325 Pa (1 atm) by definition. This is approximately 101.325 kPa, 1.01325 bar, or 14.696 PSI. At sea level, actual atmospheric pressure typically ranges from 97 kPa to 104 kPa depending on weather conditions.
What is the difference between absolute and gauge pressure?
Absolute pressure is measured relative to a perfect vacuum (zero). Gauge pressure is measured relative to local atmospheric pressure. A tire inflated to 32 PSI gauge actually has 32 + 14.7 = 46.7 PSI absolute. Vacuum systems and thermodynamics use absolute; tire gauges and hydraulics typically use gauge.
How do I convert mmHg to kPa?
Multiply mmHg by 0.133322. For example, 120 mmHg (systolic blood pressure) × 0.133322 = 16.0 kPa. Standard atmospheric pressure = 760 mmHg = 101.325 kPa. Blood pressure and some medical equipment use mmHg; European medical standards increasingly use kPa.
What pressure is used in car tire measurements?
In the US: PSI (pounds per square inch), typically 30–35 PSI for passenger cars. In Europe: bar, typically 2.0–2.5 bar. In Australia and some other regions: kPa, typically 200–250 kPa. All three represent the same pressures; 32 PSI ≈ 2.21 bar ≈ 221 kPa.
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