Resin Calculator
To find out how much ClearResin you will need for a single coat, input the length and width of your piece here:
Get the Right Amount Every Time
Our free epoxy calculator takes the guesswork out of your artistic projects. Whether you're creating resin art, jewelry, or coating projects, getting the measurements right matters. Too little resin means you'll need to mix another batch (which can create visible lines), and too much just wastes material and money.
This tool is easy to use, just enter your dimensions and we'll tell you exactly how much resin you need. No math required on your end.
How It Works
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1. Measure your mold or surface
Grab your dimensions in inches (length, width, and height for molds, or length and width for coating projects)
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2. Enter the numbers
Input your measurements into the calculator
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3. Get your results
The tool will show you the total volume in cubic inches and the amount of resin required in fluid ounces
Understanding Your Results
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1. Volume Measurements
They tell you the space you're filling. Our calculator shows this in cubic inches, which is pretty standard for resin work. Some folks prefer to think in fluid ounces or gallons coverage, especially for larger art pieces.
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Weight vs. Volume
It can be confusing at first. Epoxy resin is typically sold by weight (like "32 oz kit"), but you'll be measuring your space by volume. The calculator handles this conversion, so you know exactly what to order from our shop.
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3. Part A and Part B
Most epoxy systems mix at specific ratios. Keep in mind that when we say you need 16 oz of resin, that's usually the combined total of both parts after mixing.
Frequently Asked Questions
How accurate is this resin calculator for irregular shapes?
The calculator works best for standard rectangular or square shapes. For irregular molds, measure the longest length, widest width, and deepest height, this gives you a maximum volume estimate. You'll likely use slightly less resin than calculated, which is fine since you're planning to mix extra anyway. For circular molds, measure across the widest diameter for both length and width. The tool will overestimate a bit, but that's preferable to running out of epoxy mid-project.
Can I use this for both coating and casting projects?
Yes, absolutely. For coating flat surfaces like canvas or wood, enter your length and width, then use 0.125 inches (1/8 inch) for height if you want a standard flood coat. For casting in molds, enter all three dimensions. The calculator handles both scenarios, it's really about whether you're filling volume or covering area. Coating typically uses less resin per square foot than deep casting projects.
Do I need to account for objects inside my mold?
The calculator gives you the total volume of your space. If you're putting objects in your mold (like flowers, wood, or other inclusions), they'll displace some resin. For small items, the difference isn't huge. For larger objects that take up maybe 20-30% of your mold space, you might want to reduce your calculated amount accordingly. Most artists still prefer to mix the full calculated amount, you can always use extra resin for smaller projects.
Why does my resin kit size not match the calculator results exactly?
Resin kits come in standard sizes (like 16 oz, 32 oz, 1 gallon), but your project needs what it needs. The calculator tells you the actual amount required, then you'll need to round up to the next available kit size from the shop. If you need 18 oz but kits come in 16 oz or 32 oz, go with the 32 oz. Better to have leftover resin than to stop mid-pour to mix more.