Pressure Conversion
Convert units of pressure
Features
Supports over 50 pressure units
Broadly covers everything from pascals to atmospheres, psi, and columns of mercury
Convert all at once as you type
Convert to all units in real time just by entering a value
Covers weather to industry
Includes field-specific units such as hPa, MPa, and kgf/cm²
Get results with one click
Copy the converted value of each unit with a per-row button
How to Use
Choose the base unit
Specify the unit of the input value with the dropdown under "Base unit"
Enter the value to convert
Entering a number in the "Value" field starts the conversion instantly
Check and copy the conversion results
Check the value of each unit in the list and copy a number with the button
Use Cases
Reading air pressure and weather charts
Convert hPa and atm to unify the units of weather data
Converting tire pressure units
Convert psi with kgf/cm² or bar to check the proper value
Pressure design for piping and equipment
Convert to MPa or kPa to compare equipment spec values with each other
Cross-checking values from overseas standards
Convert psi or inHg to Japanese units to check specifications
Basic Knowledge
What is Hectopascal (hPa)?
Hectopascal is a unit used in weather forecasts to express atmospheric pressure. 1 hPa equals 100 pascals. Standard atmospheric pressure (1 atm) is 1013.25 hPa, and the lower the central pressure of a typhoon, the stronger its intensity.
Relationship between Atmospheric Pressure, Pa, and bar
The SI unit of pressure is the pascal (Pa), with the relationship 1 atm (atmosphere) = 101,325 Pa ≈ 1.013 bar. Tire pressure is often expressed in kPa or bar, while MPa is commonly used in industrial applications.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
unit conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the input values and conversion results and input suggestions are not stored on the server.
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Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.