Pounds per square inch (psi) to Millibar (mbar) Conversion
Pounds per square inch
Pounds per square inch (psi) is a unit of pressure defined as one pound-force per square inch (approximately 6,894.76 Pa). It is the standard for tyre pressure, hydraulic systems, and gas cylinders in the United States. Standard atmospheric pressure is approximately 14.696 psi. In engineering, gauge pressure (psig — relative to atmosphere) is distinguished from absolute pressure (psia — relative to a perfect vacuum), a distinction critical in thermodynamics and fluid system design.
Millibar
The millibar (mbar) is a unit of pressure equal to one thousandth of a bar (100 Pa). It is the standard unit for atmospheric pressure in meteorology: standard atmospheric pressure is 1,013.25 mbar, and weather maps plot isobars (lines of equal pressure) in millibars or hectopascals (1 hPa = 1 mbar). The eye of a powerful hurricane can have a central pressure below 900 mbar, while high-pressure systems typically exceed 1,020 mbar.
| Pounds per square inch (psi) | Millibar (mbar) |
|---|---|
| 0.1 psi | 6.8948 mbar |
| 1 psi | 68.9476 mbar |
| 2 psi | 137.8951 mbar |
| 3 psi | 206.8427 mbar |
| 5 psi | 344.7379 mbar |
| 10 psi | 689.4757 mbar |
| 20 psi | 1,378.9515 mbar |
| 30 psi | 2,068.4272 mbar |
| 50 psi | 3,447.3786 mbar |
| 100 psi | 6,894.7573 mbar |
| 1000 psi | 68,947.5729 mbar |
Frequently Asked Questions (FAQ)
How many millibar are in 1 pounds per square inch?
1 pounds per square inch (psi) is exactly 68.948 millibar (mbar).
How do I convert pounds per square inch to millibar?
Multiply the value in pounds per square inch by 68.948 to get the result in millibar. Or use the converter above — type any number and see the result instantly.