Pressure Converter

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Pressure Unit Converter

This online pressure unit converter lets you instantly convert between Pascal, kPa, bar, psi, atm, mmHg, and torr — the seven most widely used pressure units across engineering, medicine, and science. Whether you are inflating tires, reading a blood pressure cuff, or working on a hydraulics system, accurate pressure conversion is critical and this tool delivers it in real time. No installation, no account — just fast, reliable pressure conversions straight in your browser.

Benefits

Using a dedicated pressure converter eliminates the errors and friction of manual calculation:

Internationally accurate: Conversion factors are derived from SI standards, ensuring results match textbooks, datasheets, and regulatory documents.
Seven units in one place: Pascal, kPa, bar, psi, atm, mmHg, and torr cover virtually every real-world pressure measurement scenario.
Live results: Values update as you type — no submit button, no page reload.
Completely free: Unlimited conversions with no account or subscription needed.

Use cases

The pressure converter is valuable across a wide range of fields:

Mechanical and civil engineering: Switch between bar and psi when specifying compressor settings, pipe ratings, or hydraulic system pressures.
Medical and clinical settings: Convert mmHg blood pressure readings to kPa for international medical records and research papers.
Meteorology: Translate atmospheric pressure values (atm, hPa) from foreign weather reports into familiar units.
Automotive maintenance: Convert manufacturer tire pressure recommendations from psi to bar or kPa depending on your gauge.
Physics and chemistry education: Quickly verify homework and lab results involving gas laws (Boyle's, ideal gas equation).

How to use

Converting pressure units takes just a few seconds:

Step 1: Type the pressure value you want to convert into the input field.
Step 2: Select the source unit (e.g., psi, atm, bar) from the dropdown.
Step 3: Equivalent values in all other supported units appear instantly below.

You can switch the source unit at any time or enter a new value without refreshing the page.

Frequently asked questions

How many Pascal is 1 bar? 1 bar equals exactly 100,000 Pascal (100 kPa), making it a convenient near-atmospheric reference commonly used in European industry and weather reporting.

What is standard atmospheric pressure in psi? Standard atmosphere (1 atm) equals approximately 14.696 psi — the value often rounded to 14.7 psi in automotive and HVAC contexts.

Are mmHg and torr the same unit? They are nearly identical: 1 torr differs from 1 mmHg by less than 0.000014%, so in medicine and most engineering applications they are treated as interchangeable.

Can I convert very small or very large pressures, like those in vacuum systems? Yes — the converter handles any numeric input, from the ultra-low pressures found in vacuum chambers (fractions of a Pascal) to the high pressures used in industrial hydraulics (hundreds of bar or thousands of psi).