27 units · base unit Pa · M L⁻¹ T⁻²
Pressure & stress converter
Pressure has more competing units than almost any other quantity — meteorology, vacuum work, hydraulics, medicine and structural engineering each settled on their own. All of them convert exactly, since psi is built from the exactly-defined pound and inch.
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Show this value in all 27 pressure & stress units
- Gigapascals GPa 0.001
- Megapascals MPa 1
- Kilopascals kPa 1000
- Hectopascals hPa 10 000
- Pascals Pa 1 000 000
- Millipascals mPa 1 000 000 000
- Micropascals µPa 1 000 000 000 000
- Bars bar 10
- Millibars mbar 10 000
- Atmosphere (standard)s atm 9.869 232 667 16
- Atmosphere (technical)s at 10.197 162 129 8
- Torrs Torr 7500.616 827 04
- Millitorrs mTorr 7 500 616.827 04
- Millimeter of mercurys mmHg 7500.615 758 46
- Centimeter of mercurys cmHg 750.061 575 846
- Inch of mercurys inHg 295.299 833 01
- Millimeter of waters mmH₂O 101 971.621 298
- Centimeter of waters cmH₂O 10 197.162 129 8
- Inch of waters inH₂O 4014.630 759 76
- Foot of waters ftH₂O 334.552 563 313
- Pound per square inchs psi 145.037 737 73
- Kilopound per square inchs ksi 0.145 037 737 73
- Pound per square foots psf 20 885.434 233 2
- Kilogram-force per square centimeters kgf/cm² 10.197 162 129 8
- Kilogram-force per square meters kgf/m² 101 971.621 298
- Newton per square millimeters N/mm² 1
- Dyne per square centimeters dyn/cm² 10 000 000
Every row is Megapascal (MPa) converted through the pascal, in exact rational arithmetic.
Common pressure & stress conversions
- MPa → kPa
- MPa → hPa
- MPa → Pa
- MPa → bar
- MPa → mbar
- MPa → atm
- MPa → Torr
- MPa → mmHg
- MPa → inHg
- MPa → psi
- MPa → ksi
- kPa → MPa
- kPa → hPa
- kPa → Pa
- kPa → bar
- kPa → mbar
- kPa → atm
- kPa → Torr
- kPa → mmHg
- kPa → inHg
- kPa → psi
- kPa → ksi
- hPa → MPa
- hPa → kPa
- hPa → Pa
- hPa → bar
- hPa → mbar
- hPa → atm
- hPa → Torr
- hPa → mmHg
- hPa → inHg
- hPa → psi
- hPa → ksi
- Pa → MPa
- Pa → kPa
- Pa → hPa
- Pa → bar
- Pa → mbar
- Pa → atm
- Pa → Torr
- Pa → mmHg
- Pa → inHg
- Pa → psi
- Pa → ksi
- bar → MPa
- bar → kPa
- bar → hPa
- bar → Pa
- bar → mbar
- bar → atm
- bar → Torr
- bar → mmHg
- bar → inHg
- bar → psi
- bar → ksi
- mbar → MPa
- mbar → kPa
- mbar → hPa
- mbar → Pa
- mbar → bar
All pressure & stress units
Each unit expressed in pascals (Pa), the unit everything in this category converts through.
| Unit | Symbol | System | Value in Pa |
|---|---|---|---|
| Gigapascal | GPa | metric | 1000000000 |
| Megapascal | MPa | metric | 1000000 |
| Kilopascal | kPa | metric | 1000 |
| Hectopascal | hPa | metric | 100 |
| Pascal | Pa | SI | 1 |
| Millipascal | mPa | metric | 0.001 |
| Micropascal | µPa | metric | 0.000001 |
| Bar | bar | metric | 100000 |
| Millibar | mbar | metric | 100 |
| Atmosphere (standard) | atm | other | 101325 |
| Atmosphere (technical) | at | metric | 98066.5 |
| Torr | Torr | other | 133.322368421 |
| Millitorr | mTorr | other | 0.133322368421 |
| Millimeter of mercury | mmHg | other | 133.322387415 |
| Centimeter of mercury | cmHg | other | 1333.22387415 |
| Inch of mercury | inHg | us | 3386.38864034 |
| Millimeter of water | mmH₂O | metric | 9.80665 |
| Centimeter of water | cmH₂O | metric | 98.0665 |
| Inch of water | inH₂O | us | 249.08891 |
| Foot of water | ftH₂O | us | 2989.06692 |
| Pound per square inch | psi | us | 6894.75729317 |
| Kilopound per square inch | ksi | us | 6894757.29317 |
| Pound per square foot | psf | us | 47.8802589803 |
| Kilogram-force per square centimeter | kgf/cm² | metric | 98066.5 |
| Kilogram-force per square meter | kgf/m² | metric | 9.80665 |
| Newton per square millimeter | N/mm² | SI | 1000000 |
| Dyne per square centimeter | dyn/cm² | cgs | 0.1 |
About pressure & stress units
Convert pascals, bar, psi, atmospheres, torr, mmHg and water-column pressures.
Pressure has more competing units than almost any other quantity — meteorology, vacuum work, hydraulics, medicine and structural engineering each settled on their own. All of them convert exactly, since psi is built from the exactly-defined pound and inch.
Dimensional formula: M L⁻¹ T⁻². Every conversion on this page goes through the pascal, using exact fractions rather than decimal approximations. Read how that works →