Concrete Sealer Calculator
Estimate concrete-sealer volume, full containers, purchased capacity, excess material and cost from surface area, coat count and product coverage.
Default project preview
8.8 gal
Full containers
2
Surface area
1,200 ft²
Total coat coverage
2,400 ft²-coats
Purchased volume
10 gal
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Concrete surface area
Enter this project assumption in ft². The current imperial default is 1200 ft².
Sealer coats
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 1.
Coverage per volume unit per coat
Enter this project assumption in ft²/gal. The current imperial default is 300 ft²/gal.
Extra allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Container size
Enter this project assumption in gal. The current imperial default is 5 gal.
Price per container
Enter this project assumption in a unitless value. The current imperial default is 160. Minimum: 0.
How to read the outputs
Full containers
5 gal each. Default preview: 2.
Surface area
entered concrete area. Default preview: 1,200 ft².
Total coat coverage
area × coats. Default preview: 2,400 ft²-coats.
Purchased volume
full containers. Default preview: 10 gal.
Capacity above estimate
rounding reserve. Default preview: 1.2 gal.
Material cost
sealer containers. Default preview: $320.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Required volume = surface area × coats ÷ coverage rate × allowance factor. Containers are rounded up to the entered package size.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 29, 2026
Use this calculator to estimate concrete sealer containers from surface area, coat count and the exact product coverage. It does not determine whether a penetrating, film-forming or specialty sealer is suitable for the slab.
Calculation steps
- 1Measure only the surface that will be sealed.
- 2Multiply by the planned number of coats.
- 3Use the manufacturer coverage for the surface porosity and application method.
- 4Add allowance and round to full containers.
Worked numerical example
A 1,200 ft² driveway receiving two coats creates 2,400 ft² of coat-area. At 250 ft² per gallon and 10% allowance, the order is 11 gallons, rounded to the available container sizes.
Purchasing and rounding
Coverage can vary greatly between the first and later coats. Purchase container combinations that meet or exceed the total volume while respecting shelf-life and mixing requirements.
Interpret the result
A lower coverage value means more product is absorbed or deposited per square foot. It should not be increased merely to reduce the estimated order.
Page-specific assumptions
- Uniform surface condition.
- Coverage input reflects the selected product and substrate.
- No significant overspray outside the allowance.
- Repairs and cleaning are completed separately.
Common mistakes
- Using best-case coverage on porous concrete.
- Ignoring multiple coats.
- Applying incompatible sealer over an existing coating.
- Sealing concrete before the product permits.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Concrete Sealer Calculator questions
Why can porous concrete need more sealer?+
Open or weathered surfaces absorb more product than dense, previously sealed concrete.
Should every sealer receive two coats?+
No. Use the product instructions for coat count, spreading rate and recoat timing.
Does this include surface preparation?+
No. Cleaning, repairs, etching or grinding are separate project items.