"How much epoxy do I need?" is the first question every project starts with. The answer depends entirely on your project type and dimensions — there's no universal number. Below you'll find quick-answer tables for the most common project sizes, plus guidance on using the free epoxy calculator for custom dimensions.
Enter your exact project dimensions for a precise epoxy amount with mix breakdown and cost.
🧪 Calculate My Resin Amount ⟶Measurements below use 85% void fill, 1.5″ pour depth, and 10% waste buffer. Your channel dimensions will vary — these are starting estimates only:
| Table Length | Channel Width | Total (fl oz) | Total (gallons) | Kit Size |
|---|---|---|---|---|
| 3 ft | 5″ | ~92 fl oz | ~0.72 gal | 1-gal kit |
| 4 ft | 6″ | ~133 fl oz | ~1.04 gal | 2-gal kit |
| 5 ft | 7″ | ~194 fl oz | ~1.52 gal | 2-gal kit |
| 6 ft | 8″ | ~265 fl oz | ~2.07 gal | 3-gal kit |
| 7 ft | 9″ | ~354 fl oz | ~2.77 gal | 3-gal kit |
| 8 ft | 10″ | ~461 fl oz | ~3.60 gal | 5-gal kit |
Based on 2 coats at 1/8″, 1.15× porosity factor (normal concrete), and 10% waste buffer:
| Floor Area | Net (fl oz) | With Buffer (gal) | Kit Size |
|---|---|---|---|
| 100 sq ft | 3,379 fl oz | ~29 gal | Six 5-gal kits |
| 200 sq ft | 6,758 fl oz | ~58 gal | Twelve 5-gal kits |
| 400 sq ft (standard garage) | 13,516 fl oz | ~116 gal | Twenty-four 5-gal kits |
| 600 sq ft | 20,275 fl oz | ~174 gal | Thirty-five 5-gal kits |
Floor projects are much larger than most people expect. Use the floor calculator to fine-tune based on your coat thickness and surface condition.
| Project | Qty | Approx fl oz needed | Kit Size |
|---|---|---|---|
| Pendants (1.5×1×0.2″) | 10 | ~1 fl oz | 4-oz kit |
| Pendants | 50 | ~5 fl oz | 8-oz kit |
| Ring blanks (1×0.4×0.35″) | 20 | ~2 fl oz | 4-oz kit |
| Earrings (0.75×0.75×0.15″) | 30 pairs | ~3 fl oz | 4-oz kit |
| 6″×6″×2″ box mold | 1 | ~44 fl oz | 2-qt kit |
| 4″ diameter sphere | 1 | ~19 fl oz | 1-qt kit |
For a 24×24 inch coffee table at 1/8″ flood coat: approximately 32 fl oz per coat. Two coats with 10% buffer = ~70 fl oz total. Buy a 2-quart (64 oz) or half-gallon kit and you'll have a small amount to spare for touch-ups.
Calculate your net volume, add 10–15% waste buffer, then round up to the next available kit size. Never round down — running short mid-pour forces a second batch which can cause visible finish differences. The calculator shows the number of kits required based on your kit size input.
A typical oval pendant bezel (1.5 × 1 × 0.2 inches) holds about 0.083 fl oz. For 10: ~0.83 fl oz net. With 20% jewelry waste buffer: ~1 fl oz. A 4-oz starter kit covers up to 40 pendants at this size. Use the jewelry calculator for your exact bezel dimensions.