King Arthur Flour has this super-useful chart on their website to convert volume to weight. Importantly, their flours have different weights for a 1 cup volume, and you can find that specific info at this page.
I can’t say enough about baking by weight. It’s always difficult for me to bake by volume anymore – I hate sifting dry ingredients and, when it matters, I don’t want to skip the step and have overly dry baked goods. I still turn to the tablespoons and teaspoons for things like vanilla, salt, or baking powder/soda but everything else – give me weight to give me cake!