Estimate stain gallons and whole containers from surface area, coats, and product coverage.
Use this calculator when you are planning stain for a deck, rail, or other measured surface. Enter the surfaces and number of coats, then replace the starting coverage with the product label when you have it.
Multiply net surface area by coats and divide by coverage per gallon. Apply the allowance, then round up to whole containers.
A 300 sq ft deck at two coats and 300 sq ft per gallon per coat needs about 2 gallons before any product-specific adjustment.
Buy enough of one batch to keep the color consistent across a large surface. Check recoat timing and whether the label coverage assumes smooth or weathered wood.
Wood age, porosity, texture, application method, coats, rail details, container size, and product coverage all affect usage.
The estimate does not predict primer, tint, sheen, stripping, cleaning solution, or extra stain for unmeasured details.
Yes. Add rails, stairs, or other details as their own measured surfaces when they need stain.
Use the coverage printed on the product label when possible. Coverage changes with wood condition and application method.
Yes. Enter the coats you plan to apply, and the calculator multiplies the surface area before rounding the purchase.
Short, practical help for the next step in this project.