Concrete Overlay Calculator

Calculate overlay material bags, primer, sealer, and water for decorative concrete resurfacing by area and thickness.

Surface area (sq ft)

Overlay thickness (inches)

Overlay type (1-4)

Waste factor (%)

Tab to move between fields

Overlay bags (50 lb)

Total material weight (lbs)733

Primer / bonding agent (gal)1.8

Sealer (gal)4.4

Mixing water (gal)20.2

Total material cost ($)$1,088.27

Material cost per sq ft ($)$2.72

How to Use This Calculator

Measure the existing concrete surface area in sq ft and enter the desired overlay thickness in inches.
Select the overlay type: 1=micro-topping (1/16–1/8 in), 2=stampable overlay (1/4–3/8 in), 3=spray-texture, 4=heavy resurface (3/8–3/4 in).
Set a waste factor of 10% for typical flat surfaces, or 15–20% for irregular shapes.
Read Overlay Bags (50 lb) and Mixing Water (gal) to prepare your material order.
Note Primer / Bonding Agent (gal) — all overlays require a bonding primer before application.
Use Material Cost and Cost per Sq Ft to prepare bids or evaluate resurfacing versus replacement.

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