Convert units - temperatures, pressure, hardness

A conversion tool for various measurement units used in water treatment and industrial applications. The page allows users to convert values across multiple unit systems by entering a value and selecting its measurement unit, with converted results displayed automatically. Specific converters are provided for: water hardness (German Degrees, French Degrees, English Degrees, grains per gallon, ppm, mmol/l), temperature (Celsius, Kelvin, Fahrenheit), pressure (Bar, Atmosphere, Pascal, mmHg, kg/cm2, pound per square inch), volume (gallons, barrels, liters), MPY (mils per year), flow rate (with volume flow and velocity calculations based on pipe diameter), and delta temperatures (temperature differences across three unit systems).