🌊 Pressure Converter
PSI, bar, kPa, atm and mmHg
About this calculator
PSI, kPa, bar, atmospheres, mmHg, and more — enter a pressure in any unit and convert across the full set. Useful for tires, HVAC work, scuba diving, and reading weather maps (where hectopascals rule). It also covers inches of mercury and torr for weather and laboratory use, and every conversion uses exact defined relationships between units — no rounding shortcuts.
Tip: standard atmospheric pressure is 101.325 kPa — and Canadian weather maps use hectopascals (hPa), which are numerically identical to millibars.