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Barometric Pressure Conversion

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What is barometric pressure?Barometric pressure units conversionHow to use this barometric pressure converterBarometric pressure conversion related toolsFAQs

This barometric pressure conversion tool is handy for converting atmospheric pressure units. Do you want to convert barometric pressure from standard atmosphere (atm) to bar? Do you want to know how much barometric pressure your mercury or water column indicates? Our barometric pressure converter has got your back!

The following article will briefly examine how to perform the barometric pressure unit conversion. We will also present a convenient table for barometric pressure conversion.

What is barometric pressure?

Barometric pressure is another name for atmospheric pressure, named after the instrument barometer used to measure it. Barometric pressure is caused by the Earth's gravity acting on the atmosphere. We can look at barometric pressure as the pressure acting at any point on Earth due to the "weight" of the air above this point.

Barometric pressure units conversion

The SI unit for pressure is Pascals (Pa). The standard atmosphere (atm) is approximately equal to the barometric pressure at mean sea level, 101325 Pa. We can use it as a reference value or a unit of atmospheric pressure.

Other units of pressure like bar, pound per square inch (psi or lbf/in2), kilo- and hectopascals (kPa and hPa) are also used to measure barometric pressure. Alongside them are units like torr, mmHg, inHg, etc., that apply to barometric pressure. We've summed up the unit conversion rates in the following barometric pressure conversion table:

This barometric pressure conversion table should help you calculate barometric pressure in different units.

Pascal (Pa)

Bar (bar)

Standard atmosphere (atm)

Torr (torr)

Pound per square inch (lbf/in2)

Millimeter of mercury (mmHg)

1 Pa






1 bar






1 atm

≡ 101325

≡ 1.01325




1 Torr



1/760 ≈ 0.001315789



1 lbf/in2






1 mmHg






Let's try an example of barometric pressure conversion. Say you want to convert 12 bar pressure into atm.

12 bar=12×0.986923 atm/bar=11.843076 atm\begin{align*} \rm 12 \text{ }bar &= \rm12 \times 0.986923 \text{ } atm/bar\\ &= \rm 11.843076 \text{ } atm \end{align*}

How to use this barometric pressure converter

Our barometric pressure converter is simple to use:

  1. Enter the barometric pressure in any of the four fields present. If you cannot find your desired unit, click on the unit in any field and select the unit you like from the units dropdown list.

  2. This barometric pressure converter will automatically calculate barometric pressure in different units and present them in the remaining three fields. If your target unit is not among them, click on the unit in any field, and you will likely find it in the dropdown list.


How do you convert barometric pressure from bars to hectopascals?

To convert barometric pressure from bars to hectopascals (hPa), follow these steps:

  1. Find the unit conversion rate from bars to hectopascals:
    1 bar = 100000 Pa = 1000 hPa.

  2. Multiply the pressure in bars with 1000 hPa/bar to convert bars to hectopascals:
    pressure in hPa = pressure in bar × 1000 hPa/bar.

  3. Verify the result with our barometric pressure conversion tool.

What is 210 kilopascals of pressure in bars?

210 kPa is equal to 2.1 bars of pressure. To calculate this, follow these steps:

  1. Find the unit conversion rate from kilopascals to bars:
    1 kPa = 1000 Pa = 0.01 bar.

  2. Multiply the pressure in kPa with 0.01 bar/kPa to convert kilopascals to bars:
    pressure in bar = 210 kPa × 0.01 bar/kPa = 2.1 bar.

  3. Verify the result with our barometric pressure conversion tool.

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