Calculating tool based on VBA

I have a VBA calculating tool where you can insert different parameters and dimensions and it calculates your savings and so on. Now I need to create an online version of such calculating tool. It will probably require knowledge in php, html and javascript but as I know there are different solutions possible. As an example you can check this calculating tool : [login to view URL] and click on The easy-to-use efficiency calculator. Take into consideration that all calculations already done in VBA and design sample will be given, therefore it is a small and simple project.