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Pressure converter

This pressure converter changes pascals, kilopascals, megapascals, bar, atmospheres, psi, mmHg and kgf/cm². Enter a value and its starting unit to see the selected result and every supported equivalent.

The calculation first converts the input to pascals using full factors. Only the displayed value is rounded, so the conversion does not lose precision at an intermediate step.

ValueFromTo

Result

2.0684 bar

Formula: 30 pound-force per square inch (psi) × 0.0689475729317 ≈ 2.06842718795 bar

In every unit

Unit	Value
pascal (Pa)	206,842.72
hectopascal (hPa)	2,068.43
kilopascal (kPa)	206.84
megapascal (MPa)	0.206843
millibar (mbar)	2,068.43
bar	2.0684
standard atmosphere (atm)	2.0414
torr (Torr)	1,551.45
millimetre of mercury (mmHg)	1,551.45
pound-force per square inch (psi)	30
kilogram-force per cm² (kgf/cm²)	2.1092

Pascals, kilopascals, megapascals and bar

The pascal is the SI unit of pressure: 1 Pa is one newton per square metre. The general conversion formula is p₂ = p₁ × f₁ ÷ f₂, where each factor is the number of pascals in that unit.

Kilo- and mega- represent exact powers of ten. The bar also has an exact definition: 1 bar = 100,000 Pa = 100 kPa = 0.1 MPa.

Unit	In pascals	Equivalent
1 hectopascal (hPa)	100 Pa	1 mbar
1 kilopascal (kPa)	1,000 Pa	10 hPa
1 bar	100,000 Pa	100 kPa = 0.1 MPa
1 megapascal (MPa)	1,000,000 Pa	10 bar
1 standard atmosphere	101,325 Pa	1.01325 bar

MPa to kgf/cm²

Kilogram-force is defined using standard gravity of 9.80665 m/s². It follows that 1 kgf/cm² = 98,066.5 Pa = 0.0980665 MPa = 0.980665 bar under that definition.

Multiply MPa by 10.197162129779… to obtain kgf/cm². For example, 2.5 MPa ≈ 25.4929 kgf/cm². In the other direction, multiply kgf/cm² by 0.0980665, so 10 kgf/cm² = 0.980665 MPa.

Conversion	Result
1 MPa to kgf/cm²	≈ 10.197162 kgf/cm²
5 MPa to kgf/cm²	≈ 50.985811 kgf/cm²
1 kgf/cm² to MPa	0.0980665 MPa
10 kgf/cm² to bar	9.80665 bar

PSI to bar and bar to PSI

PSI means pound-force per square inch. The international pound and inch have exact metric definitions, which gives 1 psi = 6,894.757293168… Pa = 0.06894757293168… bar.

Multiply psi by 0.06894757293168 to get bar. For example, 32 psi ≈ 2.206322 bar. Multiply bar by 14.503773773… for psi, so 2 bar ≈ 29.00755 psi.

Value	Equivalent
1 psi	≈ 6.894757 kPa
10 psi	≈ 0.689476 bar
1 bar	≈ 14.503774 psi
100 kPa	1 bar ≈ 14.503774 psi

Millimeters of mercury and torr

The conventional millimetre of mercury uses 1 mmHg = 133.322387415 Pa at standard gravity. For example, 120 mmHg ≈ 15.998686 kPa. This is a unit conversion only and does not interpret a medical reading.

The torr is defined as 1/760 of a standard atmosphere: 1 Torr = 101,325 ÷ 760 Pa = 133.322368421… Pa. Everyday tables often treat Torr and mmHg as equal, but their strict factors differ slightly, so the converter keeps them as separate units.

mmHg to pascals: multiply by 133.322387415.
Pascals to mmHg: divide by 133.322387415.
760 Torr = 1 standard atmosphere = exactly 101,325 Pa.
1 hPa = 1 mbar = 100 Pa; the two names represent the same unit size.

Frequently asked questions

How many pascals are in one bar?

One bar is exactly 100,000 Pa, which is 100 kPa or 0.1 MPa.

How do I convert MPa to kgf/cm²?

Multiply MPa by 10.197162129779… For example, 1 MPa ≈ 10.197162 kgf/cm².

How do I convert psi to bar?

Multiply psi by 0.06894757293168… For example, 30 psi ≈ 2.068427 bar.

How many pascals are in one mmHg?

One conventional millimetre of mercury equals 133.322387415 Pa.

Are Torr and mmHg the same?

They are often treated as equal in practical work, but strictly 1 Torr = 133.322368421… Pa while conventional 1 mmHg = 133.322387415 Pa.

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Updated: 2026-08-16