Epoxy Calculator
Are you starting an epoxy project and unsure how much resin and hardener to buy? Guessing the quantity can lead to waste, shortages, and a lot of frustration. Whether you’re pouring a river table, sealing a countertop, or doing an art piece, this epoxy calculator helps you determine the exact amount of product you need.
In this guide, we’ll show you how to use the calculator, explain what affects coverage, and help you avoid common mistakes when working with epoxy resin.
What Is an Epoxy Calculator?
An epoxy calculator is a simple tool that tells you how much epoxy resin and hardener you’ll need based on the dimensions of your project and the thickness of the pour. It eliminates guesswork, saves money, and ensures a smooth application with no last-minute trips to buy more supplies.
By measuring length, width, and depth, the calculator estimates total volume in ounces and liters, and it even includes extra coverage to account for waste and spills.
Epoxy Volume Calculator
Step-by-Step: How to Use the Epoxy Calculator
Using the calculator is simple, but accurate measurements are key. Here’s how to get the most reliable result:
Measure Your Project Area
Use a tape measure to record the length and width in inches. Measure inside edges only.
Decide on Epoxy Thickness
For seal coats, 1/16″ (0.0625) is typical. For flood coats or pours, 1/8″ to 1″ may be required.
Enter the Numbers
Input your figures into the calculator and click the button.
Add for Waste
The calculator automatically adds 10 percent to account for mixing loss and application waste.
Selecting the Right Epoxy Resin
Not all epoxy products are created equal. Some are designed for deep pours, while others work best for coatings or small molds. Here’s how to choose:
Clear Finish
For river tables and art pieces, use a crystal-clear formula.
UV Resistance
For outdoor use, choose a UV-stable product to prevent yellowing.
Pour Depth
Deep pour epoxies cure slower and are better for thick layers.
Fast Curing
For fast jobs or small batches, pick a quick-set formula with shorter work times.
Check the manufacturer's specs before you buy.
Tips for Mixing and Applying Epoxy
Once you’ve measured and purchased the correct amount of epoxy, mixing and applying it properly is essential. Follow these tips for best results:
Proper Ratios
Always use proper ratios (e.g., 1:1 or 2:1 depending on your product).
Mix Thoroughly
Mix thoroughly in a clean bucket, scraping the sides and bottom for at least 3 minutes.
Remove Bubbles
Use a torch or heat gun to remove bubbles after pouring.
Temperature Control
Apply in controlled temperatures – ideally between 70°F and 80°F.
Common Mistakes to Avoid
Even experienced DIYers run into problems. Avoid these pitfalls:
Underestimating material
Always round up to avoid running out.
Underestimating material
Always round up to avoid running out.
Underestimating material
Always round up to avoid running out.
Underestimating material
Always round up to avoid running out.
Choosing the Right Kit Size
Once you’ve calculated your required volume, it’s time to choose the appropriate kit size. Epoxy is sold in gallons, quarts, or liter kits. A few general tips:
1 quart
32 oz
1 gallon
128 oz
Most kits
Labeled as "combined volume"
Meaning resin + hardener
Example
If your calculator result shows 80 oz needed, you'll want at least a 1-gallon kit to account for waste and application margin.
Cleaning Up and Storing Leftovers
After your pour, don’t let the rest go to waste. Here’s how to store epoxy properly:
Clean Spills
Clean spills immediately with isopropyl alcohol or acetone.
Seal Containers
Seal containers tightly to prevent hardening from air exposure.
Store Properly
Store in a cool, dry place away from sunlight.
Label Everything
Label your leftovers with mix ratio and batch date for future reference.
If stored properly, many resins have a shelf life of 6 to 12 months.
Other Ways to Use the Epoxy Calculator
This calculator isn’t just for tabletops. You can use it for:
Resin art and crafts
Bar tops and countertops
Molded jewelry and coasters
Filling gaps or cracks in wood
River tables or live edge pours
Anytime you need precision
Anytime you need precision for epoxy usage, this tool will save you time and material.
Frequently Asked Questions
Can I use this for both metric and imperial measurements?
Yes, you can convert centimeters to inches (1 inch = 2.54 cm) and input those values.
What if I’m doing multiple layers?
Calculate each layer separately and add them together.
Does the calculator work for colored or metallic epoxy?
Yes. The pigment doesn't affect the volume needed.
How much should I overbuy?
The calculator includes a 10% buffer, but if you’re new to epoxy, buying an extra 5% to 10% beyond that may be wise.
Final Thoughts
Whether you’re a DIYer or a professional, using an epoxy calculator is one of the smartest steps you can take before pouring. It saves money, reduces waste, and helps you avoid mistakes.
Try the calculator above before your next project and enjoy accurate planning, smooth pouring, and professional results.