Practice

Overall everything looks clean, but you did put to much html tags. Just try to keep things as simple as possible. It will help u in the future by saving time and making it easy to make correction to your code. Otherwise, job well done!!!!!

I was of the same mentality where I wanted to use a single/two unit(s) for all the measurements. But after some experience, realized that units of measurement are made for a reason. To apply them where they fit the most. There is a reason we have meters and centimeters(we can easily measure everything in Centimeters if we want to.)