Pressure Converter

Convert between PSI, bar, Pascal, atmospheres, mmHg, and kilopascals. Used in engineering, tire pressure, weather forecasting, diving, and medical blood pressure measurements.

Conversion Formula

1 atm = 101,325 Pa = 14.6959 PSI = 1.01325 bar = 760 mmHg

Pressure Unit Conversion Guide

Pressure is used in many contexts: weather (atmospheric pressure in millibars or hPa), tire pressure (PSI or bar), blood pressure (mmHg), industrial systems (bar or Pascal), and scuba diving (bars of depth pressure). Different industries use different units.

PSI (Pounds per Square Inch)

PSI is the most common pressure unit in the US for tire pressure (30-35 PSI), hydraulic systems, and compressed air. 1 PSI = 6,894.76 Pascal = 0.0689476 bar. Standard car tire pressure: 32-35 PSI = 2.2-2.4 bar.

Bar vs Pascal

The bar is used widely in meteorology and engineering. 1 bar = 100,000 Pascal (Pa) = 100 kPa. Standard atmospheric pressure is 1.01325 bar = 1 atm = 101,325 Pa. Weather stations report pressure in hectopascals (hPa) where 1 hPa = 1 millibar (mbar).

Blood Pressure: mmHg

Blood pressure is measured in millimeters of mercury (mmHg). Normal blood pressure is 120/80 mmHg. 1 mmHg = 133.322 Pa = 0.001333 bar. The two numbers represent systolic (heart pumping) and diastolic (heart resting) pressures.

Frequently Asked Questions

Divide PSI by 14.5038 to get bar. Or multiply PSI by 0.0689476. For example: 35 PSI ÷ 14.5038 = 2.41 bar. Car tires: 30 PSI = 2.07 bar, 35 PSI = 2.41 bar.

Standard atmospheric pressure (1 atm) = 14.6959 PSI = 101,325 Pa = 1.01325 bar = 760 mmHg. This is the average air pressure at sea level. Weather reports use hectopascals (hPa) where standard pressure = 1013.25 hPa.

Passenger car tire pressure: 30-35 PSI = 2.07-2.41 bar. Motorcycle tires: 28-40 PSI = 1.93-2.76 bar. Always check your vehicle door jamb sticker for the manufacturer recommended tire pressure.

Normal blood pressure of 120 mmHg systolic = 15,999 Pa = 0.160 bar. Blood pressure is always reported in mmHg by medical convention because mercury manometers were the original measurement tool.

1 bar = 100,000 Pascal (Pa) = 100 kilopascal (kPa) = 1,000 millibar (mbar) = 1,000 hPa. The bar is not an SI unit but is widely accepted in science and engineering.

Scuba tanks are typically filled to 200-300 bar (2,900-4,350 PSI). Underwater pressure increases by 1 bar (14.5 PSI) for every 10 meters of depth. At 30m depth, total pressure = 4 bar (1 atm + 3 bar water pressure).

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Pressure Converter

Convert between PSI, bar, Pascal, atmospheres, mmHg, and kilopascals. Used in engineering, tire pressure, weather forecasting, diving, and medical blood pressure measurements.

Conversion Formula

1 atm = 101,325 Pa = 14.6959 PSI = 1.01325 bar = 760 mmHg

Pressure Unit Conversion Guide

PSI (Pounds per Square Inch)

Bar vs Pascal

Blood Pressure: mmHg

Frequently Asked Questions

Divide PSI by 14.5038 to get bar. Or multiply PSI by 0.0689476. For example: 35 PSI ÷ 14.5038 = 2.41 bar. Car tires: 30 PSI = 2.07 bar, 35 PSI = 2.41 bar.

Passenger car tire pressure: 30-35 PSI = 2.07-2.41 bar. Motorcycle tires: 28-40 PSI = 1.93-2.76 bar. Always check your vehicle door jamb sticker for the manufacturer recommended tire pressure.

Normal blood pressure of 120 mmHg systolic = 15,999 Pa = 0.160 bar. Blood pressure is always reported in mmHg by medical convention because mercury manometers were the original measurement tool.

1 bar = 100,000 Pascal (Pa) = 100 kilopascal (kPa) = 1,000 millibar (mbar) = 1,000 hPa. The bar is not an SI unit but is widely accepted in science and engineering.

Pressure Converter

Conversion Formula

Pressure Unit Conversion Guide

PSI (Pounds per Square Inch)

Bar vs Pascal

Blood Pressure: mmHg

Frequently Asked Questions

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