Is there some kind of calculator for figuring out your arrow weight?

Ruff estimate is to take you arrow length and multiply it by whatever grains per inch your type pf arrow is bare shaft. Insert i think is about 13 gr, blazers are 5 gr a piece, knock is about 12 grains i think, and then you tip weight. Add em all up you got yor total weight. WCL

Grains per inch of arrow weight x length of arrow + field point weight + insert weight + nock weight + fletching weight + any other accessory the arrow has, such as a nock collar or uni bushing.

Thanks guys, thats kind of the way I thought it was.