Ammonia Properties Gadget
The gadget has the same calculation engine as NH3 Excel Add-In library.
The Steam Tables Calculator gadget is based on the Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IAPWS-IF97).
The NH3 Tables Calculator gadget is based on the Industrial Formulation for the Thermodynamic Properties of Ammonia.
Try it on-line, enter pressure and temperature and press "Calculate" button to display results.
If you want to add the gadget to your web page(s), proceed to the main location of the NH3 Tables Gadget.