These Process Variable and Unit Conversion Calculators allow you to easily convert between various English and Metric units for pressure, temperature, liquid flow velocity, gas flow, liquid flow, volume, distance/length, area, weight, and force. Simply choose the desired calculator, click the Clear button to remove previous values, enter your value under the appropriate unit, and click the Calculate button (you need to use the Clear button between each calculation). The calculator will convert that value to each of the other units in the calculator's display fields.