calcanvil

Concrete Sealer Calculator

400 sq ft · each tile ≈ 50 sf
✓

2-4 gallons

400 sf × 2 coats; coverage 200-400 sf/gallon (Concrete sealer).

  • Coverage is a range by design: 200-400 sf/gallon (sealer PDS class: broom vs smooth finish; labeled band).
  • 2 coats assumed; openings are not deducted (pro P10-style measurement, conservative). Color changes and porous surfaces land you at the low end of coverage.
  • Whole-unit round-up: partial cans/bags aren't sold.

Why This One Is Different

Grab too few cans of sealer and you're driving back to the store mid-coat; grab too many and you're storing half-used buckets in the garage. This calculator defaults to two coats (the convention for most film-forming sealers) while letting you adjust coat count for penetrating products that only need one. Sealer coverage swings harder than almost any other coating on this site because concrete's surface texture tells the whole story: a steel-troweled garage floor drinks less sealer than a broom-finished driveway with an open, porous surface. Manufacturer product data sheets put the range at roughly 200 to 400 square feet per gallon. Whole-can rounding means the last few square feet still cost you a full unit, so measure your area before you buy, not after.

Where the Numbers Come From

  • Concrete sealer coverage runs approximately 200-400 sq ft per gallon, a manufacturer product-data-sheet range driven by broom-finished versus smooth surface texture. Source: sealer PDS class range (construction-estimating coverage engine)
  • Two coats is the default assumption for film-forming sealers, with openings not deducted from area, a conservative, pro-style measurement convention rather than a consumer deduction convention. Source: construction-estimating coverage engine convention (P10-style measurement)
  • Whole-unit rounding applies after the coverage band is applied: partial cans aren't sold, so a project a few square feet over one can's coverage rounds up to a full extra can. Source: construction-estimating coverage engine convention

More Questions

Does surface texture really change sealer coverage that much?

Yes: the manufacturer range itself spans roughly 200 to 400 sq ft per gallon specifically because porosity and texture drive consumption; a broom-finished driveway can use nearly double the sealer of a smooth, troweled floor at the same area.

Related Calculators

Formulas, waste factors, and cost models on this page follow the sourced conventions on our methodology page. Estimates only; verify with your supplier and local code.