Pressure Converter
The pressure converter allows you to quickly and accurately convert between the most common units of pressure. Whether you're working with Pascals, bars, PSI, or atmospheres, this tool handles the math instantly.
Pressure conversions are essential in engineering, meteorology, automotive, HVAC, and scientific research. With different industries and countries using different pressure units, having a reliable converter saves time and prevents errors in critical calculations.
How it works
Pressure conversions use standardized factors. All units are converted through a base unit (Pascals). For example: 1 atm = 101,325 Pa, 1 bar = 100,000 Pa, 1 psi = 6,894.76 Pa. To convert between any two units, the value is first converted to Pa, then to the target unit.
Use cases
- Converting tire pressure between PSI and bar for automotive maintenance
- Converting atmospheric pressure between mmHg and kPa for weather reports
- Converting industrial pressure readings between bar and atm for engineering
- Converting blood pressure measurements between mmHg and kPa in medical settings
Frequently asked questions
How many PSI are in 1 bar?
One bar equals approximately 14.5038 PSI, since 1 bar is 100,000 Pa and 1 PSI is 6,894.76 Pa. To convert bar to PSI, multiply by 14.5038; to convert PSI to bar, divide by 14.5038. For example, 2 bar of tire pressure is about 29 PSI.
What is 1 atmosphere in Pascals?
One standard atmosphere (atm) equals exactly 101,325 Pascals, or 101.325 kPa. It also corresponds to about 1.01325 bar, 760 mmHg, and 14.696 PSI. This value represents average air pressure at sea level.
How do I convert mmHg to kPa?
Multiply the mmHg value by 0.133322 to get kilopascals, because 1 mmHg equals 133.322 Pa. To go the other way, divide kPa by 0.133322. For example, a blood pressure of 120 mmHg equals about 16.0 kPa.
What is the difference between bar and PSI?
Both measure pressure but use different systems: bar is a metric unit equal to 100,000 Pa, while PSI (pounds per square inch) is an imperial unit equal to 6,894.76 Pa. One bar is roughly 14.5 PSI. Bar is common in Europe, while PSI is standard in the US for tires and industrial gauges.
Why do weather reports use hectopascals (hPa)?
Meteorologists use hectopascals because 1 hPa equals 100 Pa and is numerically identical to the older millibar unit, so 1013 hPa equals 1013 mbar. This keeps historical barometric records consistent. Standard sea-level pressure is about 1013.25 hPa.