How pressure converter works
Pressure is force per unit area, and many units exist for it across science, engineering, and meteorology: pascals (the SI unit), bars, atmospheres, pounds per square inch (psi), millimetres of mercury (mmHg, used in blood pressure), and inches of water. Each relates to the others by a fixed factor.
This converter expresses every unit in pascals first, then converts to the target unit. It supports pascals, hectopascals, kilopascals, megapascals, bar, millibar, atmosphere, psi, mmHg, torr (numerically equal to mmHg), and inches of water. The conversions use standard exact factors (1 atm = 101325 Pa, 1 psi ≈ 6894.76 Pa, and so on).
Enter a value, choose the source and target units, and the tool returns the converted value plus the equivalent in pascals. Use it for tyre pressure, weather readings, blood pressure, diving, and engineering calculations.