Skip to main content
Calcimator

Roof Coating Calculator

Calculate gallons of roof coating and primer needed based on roof area, coating type, and number of coats.

Inputs

sq ft
sq ft/gal

Results

Coating Gallons

80

Total Cost (w/ Primer)

$3,250.00

≈ 3 smartphones

Primer Gallons34
Coating Cost$2,400.00
How to Use This Calculator
  1. Select coating type (acrylic, silicone, polyurethane, or elastomeric).
  2. Enter roof area (sqft) and the number of coats planned.
  3. Set coverage rate (sqft/gallon) and cost per gallon for your selected product.
  4. Review gallons of primer and coating needed, coating cost, and total material cost.
  5. Add labor (0.5-1.0 hour per square for spray application) to complete your estimate.

How the result changes with Roof Area

Roof AreaCoating GallonsTotal Cost (w/ Primer)
10,090270$10,925.00
35,065936$37,830.00
65,0351,735$70,125.00
90,0102,401$97,055.00

What each input means

Roof Area
Total roof surface area to coat
Coating Type
Type of roof coating to apply
Number of Coats
Number of coating layers (2 is standard)
Coverage Rate
Coverage rate per gallon (check product specs)

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Roof Area = 3000, Coating Type = 1, Number of Coats = 2, Coverage Rate = 75 = 4 input(s) provided
  2. Calculate Coating Gallons
    Coating Gallons
    80 = 80
  3. Calculate Total Cost
    Total Cost
    3250 = $3,250
  4. Calculate Primer Gallons
    Primer Gallons
    34 = 34
  5. Calculate Coating Cost
    Coating Cost
    2400 = $2,400

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Roofing (Advanced)

Flat Roof Drainage Calculator

Size drains and scuppers for flat roofs based on roof area, rainfall intensity, and slope.

Roofing (Advanced)

Roofing Material Comparison Calculator

Compare cost, labor, and lifespan of asphalt, metal, tile, and slate roofing materials to find the best value for your home.

Roofing Systems

Cool Roof Calculator

Energy savings from reflective roofing surface.

Roofing (Advanced)

Gutter Guard Calculator

Calculate how much gutter guard material you need, including corner pieces, end caps, and total estimated cost.

More in Construction & Building Trades.