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Select your project

Select a product

Enter your project dimensions

What shape is your project?







Formula for a Rectangular Surface:
Width x Height x Thickness x .554 = fl. oz.

In terms of depth, Epoxy generally self-levels to .125 (1/8) inches.

Formula for a Round Surface:
Pi x Radius (squared) x Thickness x .554 = fl. oz.

Formula for a Tumbler:
Fluid ounces x 1.25

Formula for a Channel Pour:
Width x Height x Thickness x .554 = fl. oz.

In terms of depth, Epoxy generally self-levels to .125 (1/8) inches.

Formula for a Inclusion:
Width x Height x Thickness x .554 = fl. oz.


Disclaimer: Promise Epoxy offers no warranty, either expressed or implied, as to the reliability of the information contained herein and they assume no liability for loss or damage associated with use of these calculators.

How to use our calculator

Epoxy Calculator

Partial screenshot of an Epoxy Calculator Made Easy app used for mixing resin and hardener One of the questions asked when people first start working with epoxy resin for crafting and DIY projects is "how much epoxy do I need", and of what type? Of course, there are variables to be considered before these questions may be answered correctly, after these considerations you should be able to properly use the epoxy ratio calculator.

Epoxy Resin Coverage Calculator Considerations:

    • Seal Coat Requirements

      When figuring epoxy amount calculations using the resin calculator, one of the considerations is whether the project requires a thin layer epoxy seal coat or not. It's always best to assume a seal coat is needed than not; however, this is dependent upon several factors. Is the substrate material porous like untreated wood or smooth like a laminated surface? Also, if the project involves placing and sealing memorabilia of a porous nature such as photography and printed materials, a seal coat will be needed to protect these items.

    • Project Scope

      What is the actual size of the piece being created and therefore coated with epoxy resin? And how many coats of resin will be applied to reach the desired results? The epoxy resin coverage calculator on this page takes these variables into account. Simply plug in the dimensions requested into the resin calculator and it will provide results for the amount of epoxy resin needed.

    • Pour Thickness

The epoxy pour calculator on this page also takes into account the epoxy resin coating thickness desired. Simply enter the sought-after thickness in fractions of an inch via the dropdown menu into the resin calculator. Enter any other dimension as well and the epoxy amount calculator will automatically determine and display the amount of epoxy resin a project requires. 

    • Handling the Edge Work

One of the keys when considering the amount of epoxy resin needed for a project is whether the material will flow over/around the edges of a project or not. Projects where a dam or framework is not used to contain the material will require more epoxy resin than those that utilize molds or frames to contain the polymer. The epoxy pour calculator on this page also takes this variable into account.

It's important to accurately acquire the correct amount of (and maybe a bit more) epoxy resin to achieve the proper coverage and desired project results. Epoxy resin progresses from fluid to solid (also known as the curing process) quickly. Therefore, the material’s working time—when the mixture may be manipulated is short— is usually no more than 25–45 minutes, depending upon the type/formula of epoxy resin being used. The epoxy resin calculator is designed to help one easily figure out the amount of epoxy resin a project requires.

Note: If one runs out of epoxy resin mid project, mixed epoxy will have solidified before another batch may be mixed and poured. The prior coat will have to be sanded in its entirety before another coat is applied. It's best to avoid this situation by ensuring enough resin is available for the task at hand. Using the resin calculator to determine the amount of epoxy a project requires helps with this.