Epoxy Calculator
Calculate how much epoxy resin your project needs from your dimensions, thickness, waste allowance, and mix ratio.
Results
Total Mixed Epoxy Required
0.00 L
Resin (Part A)
0.00 gal
Hardener (Part B)
0.00 gal
Base volume: 0 cu in.
Waste-adjusted total (0%): 0 cu in.
Epoxy Calculators
We’ve built focused tools for every type of epoxy and resin project. Select a specific calculator below for customized volume, coverage, or cost estimates.
Epoxy Calculator
Calculate exact liquid volume for any geometric shape and dimension.
Open CalculatorEpoxy Coverage
Determine how many square feet a specific gallon amount of epoxy will cover.
Open CalculatorFloor Calculator
Estimate base coat and topcoat volumes for large-scale concrete flooring.
Open CalculatorDeep Pour Calculator
Calculate thick castings and river tables where specialized 2:1 resins are used.
Open CalculatorTable Top Calculator
Perfect for bar tops and seal coats applying 1/8" self-leveling layers.
Open CalculatorArt Resin Calculator
Estimate resin for canvases, molds, geodes, and circular art projects.
Open CalculatorFlooring Cost
Calculate total material budget and price-per-gallon for garage floors.
Open CalculatorFlake Calculator
Determine the weight of decorative chips needed based on broadcast rate.
Open CalculatorFiberglass Resin
Estimate required resin for composite layups using cloth weight ratios.
Open CalculatorHow Much Epoxy Do I Need?
Calculating how much epoxy resin you need comes down to determining the total volume of your project space and converting that into liquid measurements like gallons or liters. Whether you’re pouring a deep river table or applying a thin flood coat over a countertop, guessing can leave you with too little resin mid-pour or excessive wasted material.
How the Epoxy Calculator Works
The epoxy calculator determines the base volume of your project by multiplying length by width by thickness. It then adds your desired waste allowance percentage to account for spills, container residue, and edge drips.
For example, a tabletop measuring 48 inches by 24 inches with a 1/8-inch thickness has a base volume of 144 cubic inches (48 × 24 × 0.125). Adding a 10% waste allowance brings the total required volume to 158.4 cubic inches.
Epoxy Volume and Coverage
When working with epoxy, coverage is a direct conversion from volume. 1 US liquid gallon equals exactly 231 cubic inches of volume. Because of this mathematical constant, you can confidently determine coverage for any dimensions.
Using the 231 cubic inch constant, pouring a 1-inch thick layer means one gallon will cover approximately 1.6 square feet. For a thinner 1/8-inch seal coat, that same gallon covers about 12.8 square feet. Actual product viscosity and manufacturer recommendations can vary, so always confirm with your supplier’s instructions.
Common Epoxy Projects
- Tabletops & Bar Tops: Typically require a 1/8" to 1/4" flood coat to self-level over the surface.
- River Tables & Deep Pours: Often poured in thick single layers (1" to 2" or more). Deep pour epoxies frequently require a 2:1 or 3:1 mix ratio rather than 1:1.
- Countertops: Similar to bar tops but may involve multiple thin coats and a specialized heat-resistant topcoat.
- Floors: Epoxy flooring typically covers large areas at very thin depths.
Frequently Asked Questions
What is a safe waste allowance?
A 10% waste allowance is the standard recommendation. This covers resin left on the sides of your mixing buckets, drips over the edges, and minor measuring errors.
Can I change the mix ratio?
Yes. While many tabletop epoxies are 1:1, many casting and deep pour epoxies are 2:1 or even 3:1 (Resin : Hardener). Always check your product’s label and adjust the calculator accordingly before mixing.