Concrete sealer is a coverage calculation, not a concrete-volume calculation. Measure the actual surface to be coated, use the selected product's stated square-foot coverage per gallon, multiply by required coats, then round to stocked container sizes.
Divide total coat-area by the selected sealer's published square-foot coverage per gallon, then round to stocked containers. Keep coat count and porosity allowance explicit.
Published: September 20, 2026
Last reviewed: September 20, 2026
Published by BuildYard. The guide reflects BuildYard's calculation methodology and editorial standards and does not replace project-specific professional advice.
Use the finished horizontal or vertical surface area that will actually receive sealer.
Subtract large excluded areas only when they truly will not be coated.
Coverage varies with porosity and product chemistry.
Use the current technical data for the exact sealer instead of a universal gallons-per-square-foot assumption.
Multiply net area by the number of complete coats required by the selected system.
Do not hide coat count inside a waste percentage.
Porous, textured, or previously untreated surfaces can consume more material.
Treat any reserve separately so the estimate remains auditable.
Convert required gallons into the combination of one- and five-gallon containers actually available.
Verify preparation, temperature, drying, recoat, and slip-resistance requirements separately.
BuildYard example using QUIKRETE Concrete & Masonry Gloss Sealer's published 200–400 sq ft/gal range; porous surfaces may require the lower end.
| Input | Result |
|---|---|
| Surface area | 600 sq ft |
| Planning coverage | 200 sq ft/gal |
| Calculated quantity | 3.0 gal |
| Purchase | Round to stocked containers |
External references open in a new tab. BuildYard references stay on this site. Each link points to the specific technical document, article, product data, or standard page used for the related statement.
Calculate concrete volume for round post holes while subtracting square or round post displacement and converting to bags.
Read guide →ConcreteEstimate concrete countertop volume and bag quantity from slab dimensions, cutouts, product yield, and a deliberate waste allowance.
Read guide →ConcreteEstimate reinforcing-bar grid quantities from slab dimensions, spacing, edge layout, bar lengths, laps, and waste.
Read guide →Current manufacturer data, supplier specifications, drawings, field measurements, applicable codes, permit requirements, and qualified professional guidance can take priority over a general-purpose planning estimate.