Window Reveal Coating Quantity calculator.
Measure the jamb, head and optionally sill returns separately from wall faces and convert them to coating containers.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Measure the jamb, head and optionally sill returns separately from wall faces and convert them to coating containers. Reveal area = Σ(2 × opening height + opening width + optional sill width) × reveal depth × count.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Included measured surfaces
- Jambs, head and sill
- Specified coats
- 2
- Chosen product coverage
- 10 m²/L
- Selected container liquid volume
- 1 L
- Your additional material allowance
- 0 %
- Opening width
- 1 m
- Opening height
- 2 m
- Measured reveal depth
- 0.2 m
- Identical openings
- 5
Reveal coating containers: 2 containers
Counts two jambs and a head for each opening, with an optional sill. Wall faces, frames and glazing are excluded.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
All product dimensions, coverage, density, allowances and joining rules must come from your supplied plan or selected product. No building-code values are inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-05. Calculation and review policy.