The most common question we get at Pool Finish is also the most important one to get right before your plaster crew is standing in an empty pool: how many bags do I need?
Pool plaster and exposed-aggregate finishes like Diamond Brite, River Rok, Florida Stucco and Premix-Marbletite are sold in 80 lb bags, and what you are really buying is surface coverage. A standard finish coat is applied about 3/8 to 1/2 inch thick, so the math starts with your pool's interior surface area — floor plus walls — not just its length and width.
A quick estimating method:
- Measure the pool's length and width, and its average depth (shallow end + deep end, divided by 2).
- Floor area = length × width.
- Wall area = perimeter × average depth.
- Add floor + walls for total square footage, then divide by the coverage per bag for your finish (your supplier can confirm the exact figure for the product and thickness you are applying — pebble finishes and quartz finishes differ slightly).
Two practical tips from the counter: always round UP and buy a few extra bags from the same production lot — running short mid-job risks a visible color line where the new lot starts. And if your pool has a spa, beach entry or sun shelf, measure those surfaces too; they are the areas most people forget.
Skip the guesswork: send us your pool's measurements on WhatsApp at 305-877-8960 and we will calculate the exact bag count for your finish, free. Then order online at poolsfinish.com for Miami-Dade pickup or delivery — or ask about our Caribbean export service with delivery to your Miami freight forwarder.