How Much Epoxy for a 4x8 Table? (Examples by Thickness)
Updated 2026-10-21
A 4 × 8 foot surface (48 × 96 inches) is a common size for large dining tables, workbench tops, bar tops and plywood sheets. Because the area is fixed at 32 square feet, the only thing that changes the amount of epoxy is thickness. This page gives the numbers for the thicknesses people ask about most, so you can check your order before you buy.
Want a different size or your own waste percentage? Use the tabletop epoxy calculator or the general epoxy resin calculator.
The formula
Area = 48 in × 96 in = 4,608 in² (32 sq ft)
Volume (in³) = 4,608 × thickness (in)
Gallons = in³ ÷ 231 Fluid ounces = in³ ÷ 1.8047 Liters = in³ × 0.016387
4x8 table epoxy by thickness
| Thickness | Volume (in³) | Gallons | Fl oz | Liters | Gallons +10% |
|---|---|---|---|---|---|
| 1/16 in (0.0625) | 288 | 1.25 | 159.6 | 4.72 | 1.37 |
| 1/8 in (0.125) | 576 | 2.49 | 319.2 | 9.44 | 2.74 |
| 1/4 in (0.25) | 1,152 | 4.99 | 638.3 | 18.88 | 5.49 |
| 1/2 in (0.5) | 2,304 | 9.97 | 1,276.7 | 37.76 | 10.97 |
| 1 in (1.0) | 4,608 | 19.95 | 2,553.4 | 75.51 | 21.94 |
These are theoretical volumes for a perfectly flat, fully filled rectangle. Real projects lose some resin to cups, sticks and drips, which is why the last column adds 10%.
Worked example: a 1/8 inch flood coat
- Volume: 48 × 96 × 0.125 = 576 in³.
- Gallons: 576 ÷ 231 = 2.49 gal (about 319 fl oz).
- Edges: if the 1.5 inch edges are also coated at about 1/16 inch, the perimeter is 2 × (48 + 96) = 288 in, so the edge band is 288 × 1.5 × 0.0625 = 27 in³ ≈ 0.12 gal.
- Subtotal: 576 + 27 = 603 in³ ≈ 2.61 gal.
- Add 10% waste: 2.61 × 1.10 ≈ 2.87 gal.
For a 1:1 product that means roughly 1.44 gal of Part A and 1.44 gal of Part B by volume; for a 2:1 product about 1.91 gal A and 0.96 gal B. Round up to whole kit sizes — a typical shopping decision would be a 3-gallon kit (1.5 + 1.5) for a 1:1 system.
Don't forget the seal coat
Bare wood absorbs resin and releases air. A thin seal coat before the flood coat uses extra material — budget it separately. See seal coat vs flood coat and epoxy coverage per gallon.
Thicker than 1/4 inch? Check your epoxy type
Most tabletop/coating epoxies are designed for thin layers (often around 1/8 inch per coat). Filling 1/2 or 1 inch over a 4x8 area is a casting job: it needs a deep pour resin and, depending on the product's maximum pour depth, several layers. The deep pour calculator works out the number of layers, and deep pour vs tabletop epoxy explains the difference.
River tables on a 4x8 slab
If only the river gap is resin, multiply the full-volume figure by the share of area that is resin. For example, a 1.5 inch thick 4x8 top with a river covering 25% of the area: 4,608 × 1.5 × 0.25 = 1,728 in³ ≈ 7.48 gal before waste. Full method: how much epoxy for a river table.
Summary
A 4x8 surface is 32 sq ft, so every 1/8 inch of epoxy is about 2.5 gallons. Add edges, a seal coat and 10–15% waste, then round up to the next kit. Always confirm maximum thickness per pour on your product's technical data sheet.