ganak.appEpoxy Resin Calculator
Free epoxy resin calculator. Calculate how much epoxy you need in oz, gallons, or mL for table tops, river tables, and art projects. Includes mix ratio, hardener, waste factor, and cost estimate.
Thin coat before flood coat
Epoxy runs over edges (+~5%)
Total Epoxy Needed
43.9fl oz
≈ 0.34 gallons
Mix ratio: 1:1 (by volume)
Volume Breakdown
Resin and hardener quantities for your project
Pour Recommendation
Optimal layer strategy for your project dimensions
Single coat at 0.125 in is ideal
Estimated Cost
At $60/gal · 0.34 gal total
$20.57
What Is an Epoxy Resin Calculator?
Estimate exactly how much epoxy resin and hardener you need before starting your project
An epoxy resin calculator helps DIYers, woodworkers, and artists determine exactly how much epoxy they need. Instead of guessing — and risking a short pour or buying too much — you enter your project dimensions and get precise volume estimates in fluid ounces, gallons, or milliliters.
Why it matters
Epoxy isn't cheap — table top epoxy runs $60–90 per gallon, and deep pour epoxy can cost even more. Running out mid-pour means a ruined project. Overbuying wastes money. This calculator gives you the exact amounts of resin and hardener to measure, accounting for waste, multiple coats, seal coats, and edge overflow.
How to Use This Calculator
Six simple steps to get your epoxy estimate
Choose your project type
Select Surface Coating for table tops and countertops (thin pour ~⅛″), Deep Pour for river tables and encapsulation (thick pour up to 2″), or Round for coasters, round tables, and circular artwork.
Select your units and shape
Choose Imperial (inches, fl oz, gallons) or Metric (cm, mL, liters). For surface and deep pour projects, select Rectangle or Circle shape. Round mode automatically uses circular measurements.
Enter your dimensions
Measure the length and width (or diameter for circles) of your project surface. For the depth/thickness, use the preset buttons for common pours like ⅛″ for table tops or 1″ for deep pour river tables.
Set coats and waste factor
Enter the number of coats you plan to apply. A 10% waste factor is recommended to account for mixing loss, material left in the container, and absorption into porous surfaces.
Choose your mix ratio
Select your epoxy's mix ratio. Most table top epoxies use 1:1, deep pour epoxies often use 100:44 or 2:1, and some art resins use 100:83. Check your product label for the correct ratio.
Review your results
The calculator shows total volume needed, how much resin and hardener to measure separately, coverage area, and a pour recommendation. If you enter a price, you'll also see the estimated material cost.
How Is Epoxy Resin Volume Calculated?
The formulas, conversions, and methodology behind the calculator
The calculator uses standard volume formulas adapted for epoxy-specific conversion factors. All calculations start in cubic inches (or cubic centimeters for metric), then convert to fluid ounces, gallons, or milliliters.
Volume Formulas & Conversions
Worked Example — 24″ × 24″ Table Top, ⅛″ thickness, 10% waste
Volume
79.2in³
24×24×0.125×1.1
Total Epoxy
43.9fl oz
79.2 ÷ 1.805
Resin (A)
21.9fl oz
50% of total
Hardener (B)
21.9fl oz
50% of total
Coverage
4.0sq ft
24×24 ÷ 144
Epoxy Resin Mix Ratios Explained
Understanding resin-to-hardener ratios and why they matter
Epoxy resin is a two-part system — Part A (resin) and Part B (hardener). Using the wrong ratio is the most common cause of sticky, uncured epoxy. Always check your product label.
| Ratio | Common Use | Measured By |
|---|---|---|
| 1:1 | Table top, art, and coating resins | Volume |
| 2:1 | Deep pour and casting resins | Volume |
| 3:1 | Industrial coatings and specialty casting | Volume |
| 100:44 | Liquid Glass Deep Pour epoxy | Weight |
| 100:83 | Table Top and Designer Art epoxy | Weight |
Important
Ratios like 100:44 and 100:83 are by weight, not volume. Measuring by the wrong method will result in an incorrect mix and a potentially ruined project. Always use a digital scale for weight-based ratios.
How Many Coats of Epoxy Do I Need?
Layer thickness recommendations for different project types
Seal Coat
Very thin layer applied before the flood coat. Seals wood pores and prevents bubbles from rising into the final finish. 1 gallon covers ~48 sq ft.
Flood Coat
The main finish coat at ~⅛″ thickness. Creates the smooth, glossy surface. 1 gallon covers ~12–16 sq ft at this thickness.
Deep Pour
Thick pours up to 1–2″ per layer for river tables and encapsulation. Requires deep pour epoxy to avoid overheating and cracking.
Multiple Coats
For pours thicker than ¼″, use multiple thin layers. Wait 4–6 hours between layers so each layer partially cures before the next.
Key Considerations When Using Epoxy
Practical tips for a successful epoxy project
Porous surfaces absorb more epoxy
Wood like oak, walnut, or live-edge slabs will absorb epoxy on the first coat. Increase your waste factor to 15–20% for porous or live-edge wood.
Temperature affects curing
Epoxy cures best between 70–80°F (21–27°C). Cold temperatures slow curing and cause clouding. Too hot, and the epoxy may cure too fast with bubbles.
Mix thoroughly but gently
Scrape the sides and bottom of your container. Mix for 3–5 minutes, but avoid whipping air into the mixture. Let it sit 2–3 minutes to release bubbles.
Never use glass or foam containers
Glass can shatter from exothermic heat, and foam can melt. Use plastic or silicone mixing cups. The exothermic reaction can exceed 200°F in deep pours.
Always seal coat first on wood
A thin seal coat prevents bubbles from rising out of the wood grain into your final flood coat. Skipping this step almost guarantees a bubbled finish on porous surfaces.
Common Mistakes to Avoid
What can go wrong and how to prevent it
| Mistake | What Happens | How to Avoid |
|---|---|---|
| Not adding waste factor | Running out of epoxy mid-pour | Add at least 10% extra |
| Wrong mix ratio | Sticky, soft, or uncured spots | Check label — some ratios are by weight, not volume |
| Pouring too thick at once | Overheating, cracking, yellowing | Use deep pour epoxy, follow layering schedule |
| Skipping the seal coat | Bubbles rising from wood grain | Apply thin seal coat before flood coat |
| Eyeballing dimensions | Buying too much or too little | Measure exactly, use the calculator above |
Frequently Asked Questions
Common questions about calculating epoxy resin for table tops, river tables, and art projects
Embed Epoxy Resin Calculator
Add this calculator to your website or blog for free.
You Might Also Like
Related calculators from other categories
Last updated May 14, 2026