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Sources and Accuracy
Pressure conversions use pascal as the reference unit and include common engineering, weather, tire, and laboratory pressure units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
bar [bar]
Definition
The bar is a metric pressure unit equal to 100,000 pascals.
History
The bar was introduced as a convenient pressure unit close to atmospheric pressure.
Current use
Bars are used for tire pressure, compressors, diving, weather, hydraulics, and industrial gauges.
megapascal [MPa]
Definition
The megapascal (MPa) is a pressure unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use megapascal when comparing pressure values, checking specifications, converting between systems, or preparing quick estimates.