How much concrete sealer do I need?
Concrete sealer quantity depends on surface area, product coverage per gallon, number of coats, surface texture, and porosity. Use the product label as the final coverage source.
Coverage varies by concrete surface
Broom-finished, stamped, porous, rough, or older concrete can use more sealer than smooth dense concrete. Previously sealed surfaces may behave differently after cleaning and prep.
Coats, waste, and buying size
Estimate coats separately if the label gives different first-coat and second-coat coverage. Round up to the product's selling size and check shelf life before buying extra.
Common concrete slab sizes
Cubic yards below are before waste. Add your project waste percentage before ordering.
| Slab size | 4 in thick | 5 in thick | 6 in thick |
|---|---|---|---|
| 10 ft x 10 ft | 1.23 cu yd | 1.54 cu yd | 1.85 cu yd |
| 10 ft x 12 ft | 1.48 cu yd | 1.85 cu yd | 2.22 cu yd |
| 12 ft x 12 ft | 1.78 cu yd | 2.22 cu yd | 2.67 cu yd |
| 20 ft x 20 ft | 4.94 cu yd | 6.17 cu yd | 7.41 cu yd |
| 24 ft x 24 ft | 7.11 cu yd | 8.89 cu yd | 10.67 cu yd |
| 30 ft x 40 ft | 14.81 cu yd | 18.52 cu yd | 22.22 cu yd |
Before you calculate
- Measure the concrete surface area in square feet and use the product's stated coverage per gallon.
- Adjust coverage for porous, rough, broom-finished, stamped, or previously sealed concrete.
- Estimate coats separately if the product label gives different first-coat and second-coat coverage.
Common mistakes
- Using a generic coverage number instead of the product label.
- Ignoring surface porosity, cleaning, repairs, and prep loss.
- Confusing sealer material quantity with a full refinishing or staining cost.
Formula
cubic yards = (length * width * (thickness / 12) / 27) * (1 + wastePercent / 100)
Assumptions
- Concrete quantity is a planning estimate, not structural design.
- Thickness, forms, subgrade, reinforcement, drainage, slopes, and local requirements should be checked separately.
- Round ready-mix, bags, forms, sealers, and accessories up before ordering.
Example
Estimated concrete needed (cubic yards): 0.86 cubic yards
How to use this calculator
- Enter length in ft.
- Enter width in ft.
- Enter thickness in in.
- Enter waste in %.
- Review the live estimate and compare it with the example result.
- Check the formula, assumptions, product labels, and site conditions before using the Masonry Surface Garden Wall Sealer Test Tile Concrete Pad Calculator result to plan materials.
Before you buy materials
- Round up to the product's selling size and check shelf life before buying extra.
- Verify surface prep, weather window, recoat time, and application method on the label.
FAQ
What is the example masonry surface garden wall sealer test tile concrete pad cubic-yard result?
Use length, width, thickness or depth, and waste, then calculate the planning result. In the default example, the result is 0.86 cubic yards.
How do I calculate concrete sealer?
Divide concrete surface area by coverage per gallon, then add waste or adjust for coats and surface porosity.
Does concrete texture affect sealer coverage?
Yes. Rough, porous, broom-finished, or stamped surfaces can use more sealer than smooth concrete.
Should I calculate each coat separately?
Yes if the product label gives different coverage for first and second coats. First coats often absorb more material.
Does this include cleaning or prep products?
No. This calculator estimates sealer quantity only. Cleaning, etching, repairs, rollers, sprayers, and other prep materials are separate.
Related calculators
This calculator is for planning estimates only. Verify final quantities with product labels, project conditions, and a qualified professional when accuracy matters.