Hi guys, I am using wordpress and I want to create a spoke length calculator on my website similar to this one > https://www.pijin.co.uk/spokecalc.html Except mine will be much simpler, the user will only need to select which hub and which rim they are using from drop down menus then it will tell them the answer (I will input all this data). Is there any plugin that I can build this with or any advice on which html to use? Any help would be great! Mat.