Epoxy Calculator

Category: Housing/Building
- April 21, 2025
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Calculate the amount of epoxy needed for your project. Enter the dimensions of your surface area and desired thickness to get accurate material estimates for epoxy resin and hardener.

Surface Area Dimensions

ft
ft

Epoxy Application

in

Additional Options

× nominal
%

About Epoxy Resin

Epoxy resin is a versatile material used for coating, sealing, and creating decorative surfaces. Proper measurement and mixing are crucial for successful epoxy projects.

Key Components
  • Resin: The base component that provides the bulk of the material.
  • Hardener: The catalyst that causes the resin to cure and harden.
  • Mixing Ratio: The proportion of resin to hardener (typically 1:1 or 2:1).
  • Working Time: The amount of time you have to work with the epoxy before it begins to set.
  • Cure Time: The time required for the epoxy to fully harden.
Common Applications
  • Countertops: Creating durable, seamless surfaces for kitchens and bathrooms.
  • Flooring: High-gloss, durable floors for garages, basements, and commercial spaces.
  • River Tables: Filling wood slabs with colored epoxy for decorative tables.
  • Art Pieces: Creating resin art, coasters, jewelry, and decorative items.
  • Coating: Sealing and protecting various surfaces with a clear, glossy finish.

What Is the Epoxy Calculator?

The Epoxy Calculator is a practical tool that helps you determine how much epoxy resin and hardener you need for your specific project. Whether you’re coating a countertop, building a river table, or applying a seal to a floor, getting the measurements right ensures you have enough material—without overspending or running short.

This calculator is especially helpful if you’re planning a project involving wood, concrete, or art surfaces where accurate mixing ratios and volume estimates are essential for a successful result.

Formula Used

Epoxy Volume (gallons) =

(Surface Area in ft² × 144 × Thickness in inches) ÷ 231 × Coverage Factor × (1 + Waste Factor)

Resin Needed = Total Volume × (Resin Ratio ÷ (Resin Ratio + Hardener Ratio))

Hardener Needed = Total Volume × (Hardener Ratio ÷ (Resin Ratio + Hardener Ratio))

Why Use This Tool?

This calculator helps:

  • Avoid guesswork and material waste
  • Ensure you follow correct mixing ratios (like 1:1 or 2:1)
  • Plan for extras like primer or seal coats
  • Receive kit recommendations based on your required volume

It’s especially useful when working with resin on surfaces where visual appearance, strength, and durability matter. Whether you're sealing a garage floor or crafting a decorative tabletop, this tool supports you every step of the way.

How to Use the Epoxy Calculator

  1. Select your project’s surface shape: Rectangle, Circle, or Custom Area.
  2. Enter dimensions (e.g., length and width for rectangles).
  3. Specify the thickness of the epoxy layer.
  4. Choose your epoxy type. For custom formulas, enter the mixing ratio.
  5. Adjust advanced options if needed, like coverage or waste factors.
  6. Decide if you want to include a primer or seal coat.
  7. Click “Calculate Materials” to see the results.

You’ll get a breakdown of total area, epoxy volume, how much resin and hardener to mix, optional coats, and even kit size suggestions.

How This Helps With Planning

Accurate epoxy measurements make it easier to budget your project and ensure a smooth workflow. This is ideal for:

  • DIY furniture makers using river tables
  • Artists creating resin artwork or coasters
  • Contractors sealing floors or countertops
  • Hobbyists experimenting with casting or molding

It functions similarly to tools like a concrete volume estimator, tile coverage guide, or paint quantity planner—except this one is tailored for epoxy.

Frequently Asked Questions (FAQ)

  • What units does the calculator use?
    Surface area is measured in square feet (ft²), thickness in inches, and final volumes in gallons.
  • What is a coverage factor?
    This adjusts for surface texture. Rough or porous surfaces may need more epoxy. A default value of 1.1 accounts for typical surface absorption.
  • What does the waste factor cover?
    It accounts for material lost in containers or during application. You can adjust it based on your experience or job conditions.
  • Can I use this for deep pours?
    Yes. Just select “Deep Pour Epoxy” or enter a custom ratio to reflect the product you are using.
  • What if I already know my area?
    Choose "Custom Area" and directly enter the total square footage.

Planning Projects With Confidence

This calculator is part of a broader set of tools that make project planning easier, like a square footage tool for measuring rooms or a gravel coverage guide for landscaping. With the epoxy calculator, you can prepare accurately, reduce errors, and make smarter material choices.

Use it before shopping or mixing to make sure your epoxy job turns out smooth, clean, and complete.