Epoxy Resin Coating Calculator
Calculate resin and hardener quantities for coating a surface at a given thickness.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Estimate coating volume from the entered surface area and thickness. The resin-to-hardener split is calculated by volume, so use a manufacturer’s volume mix ratio; a ratio specified by weight needs density conversion. The 2:1 default is only an example. Follow the exact product instructions, including permitted pour thickness and cure conditions. Any added percentage is a planning allowance, not a product-specific recommendation.
Worked example
calculated with the default values below
Surface area 20 sq ft · Coating thickness 2 mm · Resin parts by volume 2 · Hardener parts by volume 1 · Price per litre of kit 30 $ · Waste and mixing loss 10 % Mixed resin needed 4.088 l · Mixed resin needed 4,088 ml · Resin part 2.725 l · Hardener part 1.363 l · Resin cost 122.63 $ · Cost per square foot 6.13 $
General background references
Disclaimer
These calculators provide planning estimates only. Building codes, wiring regulations and safety requirements differ by country and change over time, and nothing here replaces a licensed professional or a permit. For structural, electrical or gas work, follow local code and have the installation inspected.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
V(L) = A(ft²) × 0.092903 × T(mm) × (1 + w ÷ 100)
- A
- Area (ft²)
- T
- Thickness (mm)
- w
- Waste allowance (%)
- V
- Total mixed volume (L)
A:B parts are by volume and must match the product label. A weight ratio needs density conversion; defaults are examples.
Frequently asked questions
How should I enter the mixing ratio?
Enter the manufacturer’s resin-to-hardener ratio by volume. This calculator divides the estimated mixed volume into those volume parts; it cannot directly use a ratio specified by weight without density conversion. The default 2:1 is only an example. Follow the product label for mixing, pour thickness, and cure conditions.