Here is a handy tip from the folks over at Bob Villa’s website, how to estimate how much paint you will need for a given job. This seems like an obvious, but likely forgotten, step to do before a paint job.

One final tip: It is better to buy more paint than you think you will need than to run out before the job is done. Purchasing all your paint at once will help ensure can-to-can color consistency, and save time on trips to the store. If you have leftover paint, you can always use it for touch-ups. Unused and unopened paint may be returned for credit, unless it is a custom color.