Epoxy Calculator: How Much Epoxy Do I Need?
Epoxy is a durable coating for floors and countertops.
Calculating how much epoxy you need requires measuring the volume of the space you’ll be covering.
An epoxy floor costs an average of $2,514, and epoxy countertops cost between $2,000 and $7,000 on average.
Epoxy is a popular choice for flooring and countertops because when the liquid coating dries, it is incredibly durable. But how much epoxy do you need for your project? Our calculator will help you determine how many gallons you need so you don’t have to pause the project and run out for more supplies.
How Much Epoxy Is Needed for Garage Floors and Countertops
An epoxy floor costs an average of $2,514, and you can use the following table to estimate the number of gallons you’ll need to complete your project based on the size of your garage and how thick you want the epoxy to be.
| Garage Size (Feet) | Thickness (Inches) | Amount of Epoxy (Gallons) |
|---|---|---|
| 12x20 | 0.125 | 18.7 |
| 12x20 | 0.25 | 37.4 |
| 12x20 | 0.375 | 56.1 |
| 18x20 | 0.125 | 28 |
| 18x20 | 0.25 | 56.1 |
| 18x20 | 0.375 | 84.1 |
| 32x22 | 0.125 | 54.9 |
| 32x22 | 0.25 | 109.7 |
| 32x22 | 0.375 | 164.6 |
Epoxy countertops cost between $2,000 and $7,000 for professional installation. But you can save quite a bit of money by calculating the amount of epoxy you need and completing the project yourself. That said, it’s better to buy too much epoxy and return the unopened containers rather than not have enough on hand to complete the project. Use the following table to estimate the amount of epoxy you’ll need to coat your countertops.
| Countertop Size (Square Feet) | Thickness (Inches) | Amount of Epoxy (Gallons) |
|---|---|---|
| 10 | 0.125 | .78 |
| 10 | 0.25 | 1.6 |
| 10 | 0.375 | 2.3 |
| 25 | 0.125 | 1.9 |
| 25 | 0.25 | 3.9 |
| 25 | 0.375 | 5.8 |
| 35 | 0.125 | 2.7 |
| 35 | 0.25 | 5.4 |
| 35 | 0.375 | 8.2 |
| 45 | 0.125 | 3.5 |
| 45 | 0.25 | 7 |
| 45 | 0.375 | 10.5 |
How to Measure for Epoxy
Measuring for epoxy or epoxy paint requires knowing the volume of the space in cubic inches. Start by measuring the length, width, and depth of the room or project area in inches. Multiply those figures together to get the volume in cubic inches. Then divide the volume by 231 to determine how many gallons of epoxy you need. Use the following formula to determine how much epoxy to buy:
Epoxy Needed (in gallons) = Volume (in cubic inches) / 231
Who to Hire to Apply Epoxy
If you want to take on a DIY project, learning how to epoxy countertops or a garage floor is a good one to do yourself. You can even get DIY epoxy kits with all of the supplies you need to complete the project. If you want to hire a local epoxy flooring professional, they can make recommendations for the brand to use and how thick the epoxy should be. Then they’ll measure the space and order enough epoxy to make sure the floor or countertops are coated appropriately.
Frequently Asked Questions
Epoxy flooring costs will depend on the size of the floor, the thickness of the epoxy, and any labor costs associated with installation. It costs an average of $2,514 to install an epoxy floor, though it can cost as little as $750 and up to $5,716 or more.
How do I epoxy a garage floor?
To epoxy a garage floor, you need to measure the area of the floor, remove all items from the garage, thoroughly clean the floor, and then follow the manufacturer’s instructions to mix and apply the epoxy. Learning how to epoxy a garage floor can save you between $4 and $7 per square foot on labor.
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