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Sealer Cost CalculatorSealer & Finish Cost Calculator

Calculate how much sealer, lacquer or finish a job needs and what it costs. Account for coats, coverage rate, pack size and wastage to order the right quantity and price your finishing accurately.

Litres NeededPacks to BuyTotal + per-m2 CostMulti-CoatPDF Report
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Sealer Cost Calculator

Sealer & Finish Cost Calculator

Surface to Coat
value
coats
Product & Cost
m2/L

From product datasheet, per coat.

litres
INR
%

Overspray, absorption, touch-ups.

OK
Sealer / Coating Cost Results
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litres
Sealer Needed
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packs
Packs to Buy
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INR
Total Cost
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INR/m2
Cost per m2
MetricValueDetail
Cost Calculation
About Sealer Cost Calculator
Sealers, primers, lacquers and finishes are priced by the litre but applied by area, coat by coat. This calculator works out exactly how much product a job needs - factoring in the number of coats, the product's coverage rate and a realistic wastage allowance - then converts that into packs to buy and a total and per-square-metre cost for accurate quoting.
Where Is This Used?
Finishing ShopsFurniture CoatingJob QuotationMaterial ProcurementFlooring FinishCost Estimation
Formulas Used
Total area = Surface area x Number of coatsLitres needed = (Total area / Coverage rate) x (1 + loss%)Packs = ceil(Litres needed / Pack size)Total cost = Packs x Price per packCost per m2 = Total cost / Surface area
Frequently Asked Questions
Why does the first coat use more product?
Bare wood, especially open-grained species like oak or ash, absorbs the first coat into the fibres - the coverage rate drops sharply. Subsequent coats sit more on the surface and cover further. If your datasheet gives a single rate, the wastage allowance helps absorb this; for precision, calculate the first coat at a lower coverage figure.
How much wastage should I allow?
For brush and roller, 10% is typical. For spray application, allow 15-25% because of overspray and bounce-back. Add a little more for complex shapes, edges and touch-ups. Running out mid-job and buying a new batch risks colour or sheen mismatch, so it is safer to slightly over-order.
Does coverage differ between sealer types?
Yes, significantly. Thin penetrating oils may cover 12-16 m2/L, water-based lacquers 8-12 m2/L, and high-build or pigmented coatings far less. Always use the coverage figure from your specific product's technical datasheet rather than a generic number for an accurate cost.
ResourcesView the formulasFormula Library
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