Pressure Converter

Convert between all common pressure units including Pascal, kilopascal, megapascal, bar, millibar, PSI, atmosphere, torr, and mmHg.

Pressure Converter 11 units

From

—

Common Pressure Conversions

All Pressure Conversions

Browse all unit combinations — each page has a dedicated converter and conversion table.

Pascals → Kilopascals Pascals → Megapascals Pascals → Bars Pascals → Millibars Pascals → PSI Pascals → Atmospheres Pascals → Torr Pascals → mmHg Pascals → inHg Pascals → kgf/cm² Kilopascals → Pascals Kilopascals → Megapascals Kilopascals → Bars Kilopascals → Millibars Kilopascals → PSI Kilopascals → Atmospheres Kilopascals → Torr Kilopascals → mmHg Kilopascals → inHg Kilopascals → kgf/cm² Megapascals → Pascals Megapascals → Kilopascals Megapascals → Bars Megapascals → Millibars Megapascals → PSI Megapascals → Atmospheres Megapascals → Torr Megapascals → mmHg Megapascals → inHg Megapascals → kgf/cm² Bars → Pascals Bars → Kilopascals Bars → Megapascals Bars → Millibars Bars → PSI Bars → Atmospheres Bars → Torr Bars → mmHg Bars → inHg Bars → kgf/cm² Millibars → Pascals Millibars → Kilopascals Millibars → Megapascals Millibars → Bars Millibars → PSI Millibars → Atmospheres Millibars → Torr Millibars → mmHg Millibars → inHg Millibars → kgf/cm² PSI → Pascals PSI → Kilopascals PSI → Megapascals PSI → Bars PSI → Millibars PSI → Atmospheres PSI → Torr PSI → mmHg PSI → inHg PSI → kgf/cm² Atmospheres → Pascals Atmospheres → Kilopascals Atmospheres → Megapascals Atmospheres → Bars Atmospheres → Millibars Atmospheres → PSI Atmospheres → Torr Atmospheres → mmHg Atmospheres → inHg Atmospheres → kgf/cm² Torr → Pascals Torr → Kilopascals Torr → Megapascals Torr → Bars Torr → Millibars Torr → PSI Torr → Atmospheres Torr → mmHg Torr → inHg Torr → kgf/cm² mmHg → Pascals mmHg → Kilopascals mmHg → Megapascals mmHg → Bars mmHg → Millibars mmHg → PSI mmHg → Atmospheres mmHg → Torr mmHg → inHg mmHg → kgf/cm² inHg → Pascals inHg → Kilopascals inHg → Megapascals inHg → Bars inHg → Millibars inHg → PSI inHg → Atmospheres inHg → Torr inHg → mmHg inHg → kgf/cm² kgf/cm² → Pascals kgf/cm² → Kilopascals kgf/cm² → Megapascals kgf/cm² → Bars kgf/cm² → Millibars kgf/cm² → PSI kgf/cm² → Atmospheres kgf/cm² → Torr kgf/cm² → mmHg kgf/cm² → inHg

📐 How to Use

In the From dropdown select the unit your reading uses, such as Bar or PSI, and enter the reading in the input below it.
In the To dropdown select the unit you want; the converted pressure is calculated live and the line under it states the single-unit factor.
Click the swap button between the columns to reverse the two units, then take the figure with the Copy button.
Select a card in the Common Pressure Conversions grid for a frequent pairing, or open any pair from the All Pressure Conversions list to get its converter and conversion table.

❓ Frequently Asked Questions

QHow many PSI are in a bar?

One bar is 14.5038 PSI, and one PSI is 0.06894757 bar. A bar is exactly 100,000 pascals, while a PSI is 6,894.757 pascals, one pound of force over a square inch. Car tire pressures are quoted in both, which is why the pair comes up so often.

QWhat is 1 atmosphere in pascals?

One standard atmosphere is exactly 101,325 pascals. The same pressure is 1.01325 bar, 1,013.25 millibars, or 14.695949 PSI. It is an agreed reference value for air pressure at sea level, not a reading of current weather, which moves either side of it daily.

QAre mmHg and torr the same unit?

In practice yes, and this converter treats both as 133.322 pascals, so a value passes between them unchanged. Their definitions differ: a torr is one 760th of an atmosphere, while mmHg is the pressure under a one millimeter column of mercury. The gap is under one part per million.

QWhy does 1 atm give 760.0021 mmHg?

An atmosphere is 760 torr exactly by definition. The converter holds mmHg as 133.322 pascals, rounded down from 133.3223684, and dividing 101,325 by the rounded value leaves 760.0021. The discrepancy is around three parts per million, well inside gauge tolerance.

ℹ️ About Pressure Conversion

Pressure is force spread over an area, so the SI unit is one newton per square meter, called the pascal. A single pascal is tiny: sea-level air pressure is 101,325 of them. That is why working units are larger or borrowed from older instruments. The bar is 100,000 pascals, picked to sit close to one atmosphere without matching it. PSI is pounds-force per square inch, while mmHg and inches of mercury describe the height of a mercury column, which is why tire gauges, weather reports and blood pressure readings all speak different units.

Eleven units are included, among them kilopascals, millibars, torr and kgf per square centimeter. The pascal is the base, so each value is turned into pascals and then out into the unit you chose. Displayed answers keep four decimals above 10, six between 1 and 10, and eight below 1. The work is done in your browser.

📏 11 Supported Units

Pascal (Pa), Kilopascal (kPa), Megapascal (MPa), Bar (bar), Millibar (mbar), PSI (psi), Atmosphere (atm), Torr (Torr), mmHg (mmHg), inHg (inHg), kgf/cm² (kgf/cm²).