Grid Calc
Awhile ago I started learning a bit of React—here's one of the things I made while I was just beginning.
It's a grid calculator that lets you specify grid width, gutter, and the number of columns and it gives you the column width.
It also shows you if the column/gutter combo works out to perfectly match the width you set.
You can check it out live here: https://frosty-hypatia-1693bf.netlify.com
Note that it might not be suuuuuper great as I am still a beginner and was a mega-beginner when I made this! ✌️