How Much Resin for 1 Inch Depth
A 1 inch deep pour is the most common casting depth for river table channels, mold fills, and decorative inlays. Calculating the volume correctly before you buy — and using the right type of epoxy for this depth — determines whether the project succeeds or fails.
Enter your exact dimensions and depth to get a precise resin volume — in fluid ounces or gallons.
Use the Volume Calculator →The Formula
To calculate resin volume for a 1 inch deep pour:
1.805 converts cubic inches to fluid ounces. Add 10% waste to the result.
Example: a river channel 6 inches wide × 48 inches long at 1 inch deep:
6 × 48 × 1 = 288 cubic inches ÷ 1.805 = ~160 fl oz (~1.25 gallons)
Volume Table — Common Areas at 1 Inch Depth
| Area (L × W) | Volume (fl oz) | Volume (gallons) |
|---|---|---|
| 6 in × 12 in | ~40 fl oz | ~0.31 gal |
| 6 in × 24 in | ~80 fl oz | ~0.63 gal |
| 6 in × 48 in | ~160 fl oz | ~1.25 gal |
| 8 in × 48 in | ~213 fl oz | ~1.67 gal |
| 10 in × 72 in | ~399 fl oz | ~3.1 gal |
| 12 in × 12 in | ~80 fl oz | ~0.63 gal |
| 12 in × 24 in | ~160 fl oz | ~1.25 gal |
| 12 in × 48 in | ~319 fl oz | ~2.5 gal |
Add 10% to all volumes above to account for cup residue, mixing loss, and slight measurement variance in your actual channel dimensions.
Epoxy Type for 1 Inch Pours
Do not use tabletop or coating epoxy for 1 inch pours. Tabletop epoxy is rated for 1/8–1/4 inch per layer. At 1 inch, it generates dangerous heat, cracks, and turns yellow. Use a deep-pour casting resin rated for at least 1 inch per layer.
Deep-pour (casting) resins cure more slowly with lower exothermic heat, making them safe for 1–4 inch single pours. See: how thick can you pour epoxy for a full comparison by product type.
Frequently Asked Questions
How much resin do I need for a 1 inch deep pour?
Multiply your area in square inches by 1 (depth), then divide by 1.805 to get fluid ounces. For a 12×12 inch area at 1 inch deep: 144 ÷ 1.805 ≈ 80 fl oz. Use the volume calculator for any dimensions.
Can I pour 1 inch of regular tabletop epoxy in one pour?
No. Tabletop epoxies are limited to 1/4 inch per layer. Pouring 1 inch causes overheating, cracking, and yellowing. Use a deep-pour casting resin specifically rated for 1 inch or more per pour.