Hi,
I was happy to try your plugin and I would say, that your calculator is one of the best. I actually need to have it in different language and I need to have translated not only the input form, but also the results. I can provide with the translations if you can include it into the plugin.
Also I will be happy to see if you decided to extend functionality by adding the option of sending the results by email. This option would attract a lot of clients to you since we all dreaming about the way how to get contact information of our website visitors.
TIA
