Epoxy Resin Calculator
Common Projects — Click to auto-fill dimensions
Reference Chart
How We Calculate This
This epoxy resin calculator uses established formulas and industry-standard data to provide accurate estimates.
- Enter your specific values into the calculator fields above
- Our algorithm applies the relevant formulas using your inputs
- Results are calculated instantly in your browser — nothing is sent to a server
- Review the detailed breakdown to understand how each factor affects your result
These calculations are estimates based on standard formulas. For critical decisions, always consult a qualified professional.
How to Convert Oven Recipes to Air Fryer
This calculator uses simple geometry and the known density of mixed epoxy resin to give you accurate material estimates for any project.
The basic rule:
- Calculate the volume of your project area in cubic inches (length × width × depth for rectangles, or π × r² × depth for circles)
- Convert cubic inches to fluid ounces (1 cubic inch = 0.554 fl oz)
- Apply your selected waste factor (10% recommended to account for mixing, drips, and container residue)
- Split the total volume into resin and hardener based on your mix ratio (1:1 or 2:1)
- Always measure by volume, not weight — resin and hardener have different densities
- For deep pours over 1/4 inch, use a deep-pour / slow-cure epoxy to prevent overheating
These calculations give you the minimum amount needed. When in doubt, round up — running short mid-pour is far worse than having a little extra. Most epoxy has a shelf life of 12+ months, so leftover material won't go to waste.
When Would You Use This Calculator?
This epoxy resin calculator is designed for anyone who needs quick, reliable estimates without complex spreadsheets or professional consultations.
- When you need a quick estimate before committing to a purchase or project
- When comparing different options or scenarios side by side
- When planning a budget and need to understand potential costs
- When you want to verify a quote or estimate you've received from a professional
- When teaching or learning about the concepts behind these calculations
Frequently Asked Questions
How much epoxy do I need per square foot?
For a standard 1/8-inch thick coating, you need approximately 10 fluid ounces (about 1.25 cups) of mixed epoxy per square foot. For a thinner seal coat at 1/16 inch, you'll need about 5 oz per square foot. For deep pours, multiply accordingly — a 1-inch deep pour over one square foot requires about 80 oz (0.6 gallons) of mixed epoxy.
What's the difference between 1:1 and 2:1 epoxy?
The ratio refers to how much resin vs. hardener you mix. A 1:1 system uses equal parts resin and hardener by volume — this is the most common type sold at hardware stores and is easiest to measure. A 2:1 system uses twice as much resin as hardener. 2:1 systems often offer better UV resistance and clarity, and are common in marine and high-performance applications. Always follow the manufacturer's specified ratio exactly — incorrect ratios cause incomplete curing.
How thick should an epoxy coating be?
For a basic protective coating on a table top or countertop, 1/8 inch (about 3mm) is standard. Most coating epoxies are designed to self-level at this thickness. You can apply multiple thin coats (1/16 inch each) for more control. For a bar-top finish with embedded objects, 1/4 inch is common. For river tables and casting, depths range from 1 to 3 inches depending on your epoxy's maximum pour depth.
Can I pour deep epoxy all at once?
It depends on the epoxy type. Standard table-top / coating epoxy should NOT be poured deeper than 1/4 inch at once — it generates too much heat (exothermic reaction) and can crack, yellow, or warp your project. Deep-pour epoxy is specially formulated with slower cure times to manage heat, and can typically handle 1 to 2 inches per pour. Some deep-pour formulas allow up to 4 inches. Always check your product's data sheet for maximum pour depth.
How do I prevent bubbles in epoxy?
Bubbles are the most common epoxy problem. To minimize them: (1) Warm your resin to 75-85°F before mixing — warm resin is thinner and releases bubbles faster. (2) Mix slowly and deliberately for the full recommended time (usually 3-5 minutes) to avoid whipping in air. (3) Apply a thin seal coat first and let it tack up before your flood coat — this seals porous wood and prevents off-gassing. (4) Use a heat gun or propane torch lightly across the surface after pouring to pop surface bubbles. (5) Pour in a room that's 70-80°F with low humidity.
How long does epoxy take to cure?
Cure times vary by product and temperature. Most coating epoxies are tack-free in 12-24 hours and reach a light-use cure in 48-72 hours. Full mechanical cure (safe for heavy use, placing hot items, etc.) typically takes 7 days at 70°F. Deep-pour epoxies cure more slowly by design — expect 24-48 hours to demold and 5-7 days for full cure. Cold temperatures slow curing dramatically; try to maintain at least 70°F during the entire cure period.