Pressure Converter

Use this pressure converter to switch between units used in hydraulics, pneumatics, HVAC, weather reporting, and engineering specifications. Convert Pa, kPa, MPa, bar, psi, atm, mmHg, inHg, torr, and technical pressure units with explicit labels and copy-ready values. This tool is part of Converters and keeps pressure notation clear so unit conversion is not confused with reference type (gauge vs absolute).

Convert pressure units.

Converted values (from {from})

Unit Value

Pressure Conversion Errors Start with Unit and Reference Confusion

Pressure values can represent the same physical condition in many units. Problems appear when values are copied between standards without preserving unit and context. A pressure converter handles unit translation, but your documentation must still keep the reading type explicit. This matters in equipment settings, process sheets, inspection logs, and weather data where mixed conventions are common.

Pressure Unit Conversion Chart: Pa, kPa, MPa, bar, psi, atm, torr

Engineering documentation often uses pascal-based units (Pa, kPa, MPa), while many field specs rely on bar or psi. Instrument and atmospheric contexts may also use atm, mmHg, inHg, and torr. Some industrial references include ksi, kgf/cm², and water-column units such as mm Aq, cm Aq, in Aq, and ft Aq. Converting to a single target unit improves threshold checks, trend comparison, and cross-source validation.

Gauge vs Absolute Pressure: Unit Conversion Does Not Change Reference

Gauge pressure is measured relative to ambient atmospheric pressure. Absolute pressure is measured relative to a vacuum reference. Unit conversion only changes representation, not reference type. Always preserve suffix/context such as psig vs psia or bar(g) vs bar(a), because the same number can mean different physical states.

Precision, Calibration, and Reporting Use Cases

In control systems and calibration sheets, decimal precision can affect acceptance criteria and tuning decisions. In weather and altitude reporting, inHg and hPa/kPa conventions may coexist, so consistent conversion is essential for interpretation. In process engineering, pressure is frequently interpreted with temperature and equipment class. Keep unit labels and reference type visible to avoid specification and safety mistakes.

Pressure Commonly Connects to Temperature and Process Context

Pressure is commonly reviewed alongside Temperature converters and Manufacturing converters, where unit conventions and reporting context must remain explicit across specifications and inspection notes.

Step-by-Step Pressure Conversion Examples

Example 1: Convert 2 bar to psi

bar to psi is a common conversion when European and US equipment specifications are compared.

Given

$$P_{bar} = 2$$

Step-by-step

$$1\,bar = 14.5037738\,psi$$ $$P_{psi} = 2 \times 14.5037738 = 29.0075476$$

Result

$$2\,bar = 29.0075476\,psi$$

Example 2: Convert 101.325 kPa to atm

This conversion is used to normalize pressure values around standard atmospheric conditions.

Given

$$P_{kPa} = 101.325$$

Step-by-step

$$1\,atm = 101.325\,kPa$$ $$P_{atm} = \frac{101.325}{101.325} = 1$$

Result

$$101.325\,kPa = 1\,atm$$

Example 3: Convert 760 torr to mmHg

torr and mmHg appear in legacy and instrument contexts and are often treated as equivalent for practical reporting.

Given

$$P_{torr} = 760$$

Step-by-step

$$1\,torr \approx 1\,mmHg$$ $$P_{mmHg} \approx 760 \times 1 = 760$$

Result

$$760\,torr \approx 760\,mmHg$$

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Questions About Pressure Conversion

Practical answers for converting pressure units without mixing gauge, absolute, and reporting context.