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Pressure Unit Converter

Enter a value in any unit input field, and the system will automatically convert and display corresponding values for all other units. Click the advanced module switches to expand more unit options.

Enter Pressure

Enter a value in any unit input field, and other units will automatically sync and update.

Pa
kPa
MPa
bar
mbar
atm
mmHg
at
psi
psf
mmH₂O
Professional Units

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Usage Instructions

About Pressure Unit Converter

Pressure Unit Converter is a fast and precise tool for converting between various pressure units. It supports common units used in daily life, industry, and medicine, as well as specialized units for vacuum technology, physics, engineering, and materials science.

Key Features

  • Common Units: Pascal, kilopascal, megapascal, bar, millibar, standard atmosphere, mmHg, technical atmosphere, psi, psf, mmH₂O
  • Professional Units: Torr, dyne per square centimeter, kilogram force per square meter, inch of mercury, inch of water, micropascal, gigapascal
  • Real-time Conversion: Instant conversion as you type
  • High Precision: Accurate conversion factors with appropriate decimal precision
  • Privacy Protection: All conversions performed locally in your browser

Conversion Standards

Base Unit

All conversions use Pascal (Pa) as the base unit. Pascal is the SI base unit for pressure, defined as 1 Pa = 1 N/m² (Newton per square meter). Every unit has a precise conversion factor to Pascal, ensuring accuracy and consistency.

Precision Rules

  • Common Units: Display up to 4 decimal places, automatically removing trailing zeros
  • Professional Units: Display up to 6 decimal places for high precision
  • Very Large/Small Values: Use scientific notation for values ≥ 1e9 or ≤ 1e-6
  • Automatic Formatting: Values automatically switch to scientific notation when appropriate

Special Notes

  • Torr and mmHg: These units have the same conversion factor (133.3223684 Pa), as 1 Torr ≈ 1 mmHg by definition
  • Water Column Units: mmH₂O and inH₂O are based on pure water at 4°C (maximum density)
  • Technical Atmosphere: The technical atmosphere (at) is equivalent to 1 kgf/cm² (kilogram-force per square centimeter)

Use Cases

  • Industrial: Convert between different pressure units for hydraulic systems, pneumatic systems, and material strength testing
  • Medical: Convert blood pressure measurements between mmHg and other units
  • Automotive: Convert tire pressure between psi, bar, and kPa
  • Meteorology: Convert atmospheric pressure between bar, millibar, and standard atmosphere
  • Vacuum Technology: Work with Torr and other vacuum-related units
  • Materials Science: Convert between GPa and other units for material hardness and strength testing
  • Engineering: Use technical atmosphere and other engineering units for structural calculations

FAQ

Q: How do I reset all inputs?

A: Click the "Reset" button (rotating arrow icon) in the top-right corner of the input area to clear all input data and restore to the initial state.

Q: Which units are supported?

A: Supports common units (Pascal, kilopascal, megapascal, bar, millibar, standard atmosphere, millimeter of mercury, technical atmosphere, pound per square inch, pound per square foot, millimeter of water) and professional units (Torr, dyne per square centimeter, kilogram force per square meter, inch of mercury, inch of water, micropascal, gigapascal).

Q: What is the conversion precision?

A: All conversions use Pascal as the base unit with precise conversion factors. Common units retain up to 4 decimal places, professional units retain up to 6 decimal places, and very large or very small values use scientific notation.

Q: Is data automatically saved? Will it be lost when refreshing the page?

A: Yes, input data is automatically saved to browser local storage. Refreshing the page won't cause data loss, and you can continue editing previously entered content. Data is automatically saved about 400ms after you stop typing.