Pressure Conversions
Convert pressure units — PSI, bar, pascal, atmosphere, mmHg. Free calculators for tires, HVAC, scuba, and engineering.
7 units · 5 conversions
Pressure measures force per unit area — tire inflation (PSI), weather (bar or hPa), blood pressure (mmHg), and industrial systems (pascal or bar). Each field has preferred units, so conversion is routine in engineering and medicine.
Standard atmospheric pressure at sea level is about 101,325 pascals, 1 bar, 14.7 PSI, or 760 mmHg. Our converters use established reference factors between these scales.
Popular pressure conversions
Real-world example
Your car door sticker recommends 32 PSI but your pump gauge reads in bar. Converting 32 PSI gives about 2.2 bar — the value to set at a European fuel station.
All pressure conversions
Pressure units explained
- Pascals (Pa) · base unit
- Also: pascals
- Kilopascals (kPa)
- Also: kilopascals
- Bars (bar)
- Also: bars
- Atmospheres (atm)
- Also: atmospheres, atm
- Pounds per Square Inch (psi)
- Also: pounds per square inch
- Torr (Torr)
- Also: torr
- Millimeters of Mercury (mmHg)
- Also: millimeters of mercury, mm Hg
Frequently asked questions
- How many PSI are in one bar?
- One bar equals approximately 14.5038 PSI.
- What unit is used for blood pressure?
- Blood pressure is commonly reported in millimeters of mercury (mmHg), equivalent in magnitude to torr for this purpose.