Epoxy Pour Layers Calculator
Deep pours must be split into layers that stay within the maximum thickness of your resin. Enter the total depth and the limit to see how many layers you need and how much resin goes into each.
How the calculation works
Layers = total depth ÷ maximum per layer, rounded up. Depth per layer = total depth ÷ layers. Resin per layer = length × width × depth per layer.
Example: a 2 in deep river with a 1/2 in limit needs 4 layers of 1/2 in. If it is 48 in long and 6 in wide, each layer needs 144 cubic inches, about 0.62 US gallons, and the total is about 2.49 US gallons.
Add waste on top of this with the river table epoxy calculator.
Check the recoat time on your product's data sheet before planning your pours.
Frequently asked questions
Why pour epoxy in layers?
Epoxy gives off heat as it cures. In a thick pour the heat can build up, which can cause cracking, yellowing, warping or bubbles. Layers keep each pour within the safe thickness for the product.
What is the maximum depth per layer?
It depends on the product. Standard tabletop epoxy is often limited to around 1/8 inch per pour, while deep pour epoxies may allow 1 to 2 inches or more. Always check the data sheet.
When should I pour the next layer?
Follow the recoat window on your data sheet. Usually you pour the next layer while the previous one is still tacky, for a chemical bond. If it has fully cured, sand it and wipe it clean first.
Do the layers need to be equal?
Equal layers are the simplest and safest. The calculator divides the total depth evenly, so every layer is at or below the limit.