ada4dAdad Calculator. In Arabic Language, every letter has an equivalent numerical value known as the Abjad numbers. An on Adad calculator to find the equivalent numerical value of the wordADAD. ADAD is the Old Akkadian and Assyro-Babylonian name of the ancient Middle Eastern storm god, called Adda (Addu) or Hadda (Haddu) in northwest Semitic areas and known later