I learned how to calculate the warp and weft, but I am still a Newbie. Tonight I did my calculation for a table runner. I decided to use the automated Weavolution Calculator to check my math. I had used the wrong number. By looking at the math and figures used on both methods, I saw my error.
It is a good thing to learn the math calculation because it allows you to make your own pattern and learn basic weaving terms and requirements. It is a great thing to use the automated Calculator in Resources to check for errors while you are learning. Have you tried it yet?