Epoxy Calculator

Created by AbdulRafay Moeen
Reviewed by Bogna Szyk and Rijk de Wet
Last updated: Mar 17, 2022

This epoxy calculator is a valuable tool for DIY enthusiasts — here, you'll learn what epoxy is and how to calculate the volume of epoxy resin required to coat a surface area. Using this tool, you can easily calculate the epoxy resin amount needed for your tables and floors.

What is epoxy resin?

Epoxy resin is a liquid adhesive that becomes solid when mixed in a 2:1 ratio with the hardener. It is used to coat, laminate, and infuse different materials, providing strength, durability, and waterproofing — though it typically requires a few days to set.

It bonds well with almost all materials, whether metal, plastic, glass, ceramic, wood, or rubber. But make sure to clean the surface properly, because epoxy doesn't like greasy surfaces.

How to use the epoxy calculator?

Using the epoxy calculator, let's calculate how much epoxy you need to coat your surface. Our calculator has the following fields:

  • How thick do you want the epoxy coating?

    • Coating: Enter the amount of epoxy coating you wish to apply, e.g., 1 in.
  • What is the shape and size of your surface?

    • Surface shape: Select if your surface is rectangular or circular.
    • Surface length: Enter the length of your surface, e.g., 36 in.
    • Surface width: Enter the width of your surface, e.g., 24 in.
    • Diameter: If you select circular surface shape, you'll need the diameter of your surface.
  • Here's how much epoxy resin you'll need:

    • Epoxy: Here you will see the required volume of epoxy resin you need, based on your surface shape and dimensions, i.e., 478.75 ounces.

Note that the exact volume may differ if there are any indents or extrusions on the surface.

How to calculate the epoxy resin amount manually?

Here's how you can manually calculate how much epoxy you need.

We use the following formula to calculate the volume of epoxy resin required for a rectangular surface.

  • Volume = length × width × height

The following formula to calculate the volume of epoxy resin required for a circular surface.

  • Volume = π × radius² × height

    where:

    • Volume is the required amount of epoxy;
    • Length is the length of the rectangular surface where we want to apply the epoxy;
    • Width is the width of the same rectangular surface where we want the epoxy;
    • Radius is the half diameter of the circular surface where we want the epoxy; and
    • Height is the desired thickness of our epoxy coating.
  • Let's take the example of coating 1 in epoxy to a table, with dimensions of 8 ft by 4 ft.

    • Converting feet into inches and placing the values in the formula:

      Volume = (8 × 12) × (4 × 12) × 1
      = 4,608 in³

    • To convert cubic inches into gallons, we divide it by 231.

    Thus,
    required epoxy volume = 19.95 gallons

  • Now let's take another example of calculating epoxy resin for a round table with a diameter of 32 in. Here we will coat 2 inches of epoxy resin.

    • Placing the values in the formula:

      Volume = π × (32 / 2)² × 2
      = 1608.5 in³

    • To convert cubic inches into ounces, divide it by 1.805.

    Thus,
    required epoxy volume = 891.3 ounces

💡 For an even easier measurement, we can convert ounces into cups by dividing the result by 8.

How to calculate 2 part epoxy resin ratio?

The epoxy resin always mixes with the hardener in a 2:1 ratio, where the epoxy is twice as much as the hardener. Divide the resulting volume by the area of your applicable surface to get the coating thickness:

Coating thickness = volume / area

FAQ

What is the epoxy resin calculation formula?

For epoxy resin amount calculation, we use the following formula:

Epoxy amount = area × coating

where

  • area is the the surface where the epoxy resin is applied; and
  • coating is the thickness of the epoxy coating.

How do I calculate how much epoxy resin I need?

To calculate the amount of epoxy resin required:

  1. Measure the area of the surface.
  2. Then multiply it by the thickness of the epoxy coating.

E.g., on a surface of 36 inches, if you want 3 inches of epoxy coating, you'll need 108 cubic inches or 59.8 ounces of epoxy.

How do I calculate amount of epoxy for a table of 24"x24"?

To calculate the resin amount, multiply the surface area of your table by the required amount of resin coating. For 1" of resin thickness, you need 576 cubic inches or 319.7 ounces of epoxy resin.

How long does epoxy flooring last?

Residential epoxy flooring can last at least ten years if cared for properly. It depends on the following factors:

  • Floor material strength;
  • Prior surface treatment;
  • Epoxy coating quality & thickness; and
  • Pressure on the surface over the years.
AbdulRafay Moeen
How thick do you want the epoxy coating?
Coating
in
What is the shape and size of your surface?
Surface shape
Rectangular
Surface length
in
Surface width
in
Here's how much epoxy resin you'll need:
Epoxy
US fl oz
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