🌡️ Pressure Conversion
Convert pressure between pascals, bar, psi, atmospheres, and millimeters of mercury.
How pressure conversion works
This calculator converts pressure readings between the units most commonly used in science, engineering, weather reporting, and tire or tank gauges. It converts your input to pascals (the SI base unit) first, then converts that value into your chosen output unit.
Standard defined constants are used: 1 standard atmosphere = 101,325 Pa, 1 bar = 100,000 Pa, 1 psi = 6,894.757293168 Pa, and 1 mmHg = 133.322387415 Pa. These match the definitions used in physics and engineering references.
This tool is for general educational and planning purposes, such as comparing tire pressure or weather readings across unit systems. For calibrated industrial or medical equipment, use a certified gauge.