Engineering
Pressure Converter
Pressure is force applied over an area. The SI unit is the pascal, but engineering and weather reports commonly use bar, psi, atmospheres, or millimeters of mercury. Vacuum work uses torr and microns, and hydraulics uses fluid columns of water and mercury. These conversions treat readings as absolute pressure; gauge readings add or subtract atmospheric pressure.
50 units supported Base unit pascal (Pa)
About pressure conversion
Pressure conversion is commonly needed when tire inflation, weather forecasting, diving, and industrial systems.
Popular conversions
Convert Pascal to other pressure units
1 Pa expressed in every other pressure unit on this site.
- Pascal Pa 1
- Kilopascal kPa 0.001
- Megapascal MPa 0.000001
- Gigapascal GPa 1e-9
- Hectopascal hPa 0.01
- Decipascal dPa 10
- Millipascal mPa 1,000
- Micropascal µPa 1,000,000
- Nanopascal nPa 1,000,000,000
- Picopascal pPa 1,000,000,000,000
- Femtopascal fPa 1,000,000,000,000,000
- Attopascal aPa 1e+18
- Centipascal cPa 100
- Dekapascal daPa 0.1
- Terapascal TPa 1e-12
- Petapascal PPa 1e-15
- Exapascal EPa 1e-18
- Newton per Square Centimeter N/cm² 0.0001
- Newton per Square Millimeter N/mm² 0.000001
- Bar bar 0.00001
- Millibar mbar 0.01
- Microbar µbar 10
- Dyne per Square Centimeter dyn/cm² 10
- Standard Atmosphere atm 0.0000098692327
- Technical Atmosphere at 0.000010197162
- Torr Torr 0.0075006168
- Millitorr mTorr 7.5006168
- Pound per Square Inch psi 0.00014503774
- Kip per Square Inch ksi 1.4503774e-7
- Pound per Square Foot psf 0.020885434
- Poundal per Square Foot pdl/ft² 0.67196898
- Short Ton-force per Square Foot tonf/ft² (US) 0.000010442717
- Long Ton-force per Square Foot tonf/ft² (UK) 0.0000093238546
- Short Ton-force per Square Inch tonf/in² (US) 7.2518869e-8
- Long Ton-force per Square Inch tonf/in² (UK) 6.474899e-8
- Kilogram-force per Square Meter kgf/m² 0.10197162
- Kilogram-force per Square Centimeter kgf/cm² 0.000010197162
- Kilogram-force per Square Millimeter kgf/mm² 1.0197162e-7
- Gram-force per Square Centimeter gf/cm² 0.010197162
- Millimeter of Mercury mmHg 0.0075006158
- Centimeter of Mercury cmHg 0.00075006158
- Inch of Mercury inHg 0.00029529983
- Millimeter of Water mmH₂O 0.10197162
- Centimeter of Water cmH₂O 0.010197162
- Meter of Water mH₂O 0.00010197162
- Inch of Water inH₂O 0.0040146308
- Foot of Water ftH₂O 0.00033457047
- Inch of Mercury (60 °F) inHg (60 °F) 0.00029613397
- Inch of Water (60 °F) inH₂O (60 °F) 0.0040185981
- Foot of Water (60 °F) ftH₂O (60 °F) 0.00033488317
Complete list of pressure units
All 50 units this converter supports, each stated against the pascal (Pa).
| Unit | Symbol | System | In pascals | Conversions |
|---|---|---|---|---|
| Pascal | Pa | SI | base unit (Pa) | pascal to bar |
| Kilopascal | kPa | SI | 1 kPa = 1,000 Pa | kpa to psikpa to bar |
| Megapascal | MPa | SI | 1 MPa = 1,000,000 Pa | mpa to psi |
| Gigapascal | GPa | SI | 1 GPa = 1,000,000,000 Pa | — |
| Hectopascal | hPa | SI | 1 hPa = 100 Pa | — |
| Decipascal | dPa | SI | 1 dPa = 0.1 Pa | — |
| Millipascal | mPa | SI | 1 mPa = 0.001 Pa | — |
| Micropascal | µPa | SI | 1 µPa = 0.000001 Pa | — |
| Nanopascal | nPa | SI | 1 nPa = 1e-9 Pa | — |
| Picopascal | pPa | SI | 1 pPa = 1e-12 Pa | — |
| Femtopascal | fPa | SI | 1 fPa = 1e-15 Pa | — |
| Attopascal | aPa | SI | 1 aPa = 1e-18 Pa | — |
| Centipascal | cPa | SI | 1 cPa = 0.01 Pa | — |
| Dekapascal | daPa | SI | 1 daPa = 10 Pa | — |
| Terapascal | TPa | SI | 1 TPa = 1,000,000,000,000 Pa | — |
| Petapascal | PPa | SI | 1 PPa = 1e+15 Pa | — |
| Exapascal | EPa | SI | 1 EPa = 1e+18 Pa | — |
| Newton per Square Centimeter | N/cm² | SI | 1 N/cm² = 10,000 Pa | — |
| Newton per Square Millimeter | N/mm² | SI | 1 N/mm² = 1,000,000 Pa | — |
| Bar | bar | Metric | 1 bar = 100,000 Pa | bar to psibar to kpa |
| Millibar | mbar | Metric | 1 mbar = 100 Pa | mbar to inhg |
| Microbar | µbar | Metric | 1 µbar = 0.1 Pa | — |
| Dyne per Square Centimeter | dyn/cm² | Metric | 1 dyn/cm² = 0.1 Pa | — |
| Standard Atmosphere | atm | Other | 1 atm = 101,325 Pa | atm to psiatm to bar |
| Technical Atmosphere | at | Metric | 1 at = 98,066.5 Pa | — |
| Torr | Torr | Other | 1 Torr = 133.322368421 Pa | — |
| Millitorr | mTorr | Other | 1 mTorr = 0.133322368421 Pa | — |
| Pound per Square Inch | psi | Imperial | 1 psi = 6,894.75729317 Pa | psi to barpsi to kpa |
| Kip per Square Inch | ksi | US | 1 ksi = 6,894,757.29317 Pa | — |
| Pound per Square Foot | psf | Imperial | 1 psf = 47.8802589803 Pa | — |
| Poundal per Square Foot | pdl/ft² | Imperial | 1 pdl/ft² = 1.4881639436 Pa | — |
| Short Ton-force per Square Foot | tonf/ft² (US) | US | 1 tonf/ft² (US) = 95,760.5179607 Pa | — |
| Long Ton-force per Square Foot | tonf/ft² (UK) | Imperial | 1 tonf/ft² (UK) = 107,251.780116 Pa | — |
| Short Ton-force per Square Inch | tonf/in² (US) | US | 1 tonf/in² (US) = 13,789,514.5863 Pa | — |
| Long Ton-force per Square Inch | tonf/in² (UK) | Imperial | 1 tonf/in² (UK) = 15,444,256.3367 Pa | — |
| Kilogram-force per Square Meter | kgf/m² | Metric | 1 kgf/m² = 9.80665 Pa | — |
| Kilogram-force per Square Centimeter | kgf/cm² | Metric | 1 kgf/cm² = 98,066.5 Pa | — |
| Kilogram-force per Square Millimeter | kgf/mm² | Metric | 1 kgf/mm² = 9,806,650 Pa | — |
| Gram-force per Square Centimeter | gf/cm² | Metric | 1 gf/cm² = 98.0665 Pa | — |
| Millimeter of Mercury | mmHg | Other | 1 mmHg = 133.322387415 Pa | mmhg to psimmhg to atm |
| Centimeter of Mercury | cmHg | Other | 1 cmHg = 1,333.22387415 Pa | — |
| Inch of Mercury | inHg | Imperial | 1 inHg = 3,386.38864034 Pa | inhg to mbar |
| Millimeter of Water | mmH₂O | Metric | 1 mmH₂O = 9.80665 Pa | — |
| Centimeter of Water | cmH₂O | Metric | 1 cmH₂O = 98.0665 Pa | — |
| Meter of Water | mH₂O | Metric | 1 mH₂O = 9,806.65 Pa | — |
| Inch of Water | inH₂O | Imperial | 1 inH₂O = 249.0889083 Pa | — |
| Foot of Water | ftH₂O | Imperial | 1 ftH₂O = 2,988.9068996 Pa | — |
| Inch of Mercury (60 °F) | inHg (60 °F) | Imperial | 1 inHg (60 °F) = 3,376.85 Pa | — |
| Inch of Water (60 °F) | inH₂O (60 °F) | Imperial | 1 inH₂O (60 °F) = 248.843 Pa | — |
| Foot of Water (60 °F) | ftH₂O (60 °F) | Imperial | 1 ftH₂O (60 °F) = 2,986.116 Pa | — |
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Frequently asked questions
What is the base unit for pressure?
Pressure conversions on this site are calculated against the pascal (Pa).
Which pressure units can I convert?
You can convert between 50 units, including pascal, kilopascal, megapascal, gigapascal, and more.
Where is pressure conversion useful?
It is commonly needed when tire inflation, weather forecasting, diving, and industrial systems.
Does this converter mix measurement systems?
The converter supports SI, Metric, Other, Imperial, US units and keeps their exact definitions separate so results stay accurate.
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Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.