Total Material Cost
$41
Area
4.0 ft²
Epoxy
0.41 gal
Aggregate
11.1 lb
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Inputs
Result
Volume = 4 × 4 × 0.375 = 6 in³. Epoxy fills 30% = 1.8 in³ × 1.1 waste = 1.98 in³ = 0.009 gal. Aggregate: 0.7 × 6 / 1728 × 95 = 0.23 lb.
Inputs
Result
Volume = 24 × 24 × 0.5 = 288 in³. Epoxy: 288 × 0.30 × 1.10 / 231 = 0.41 gal. Aggregate: 288 × 0.70 / 1728 × 95 = 11.1 lb. Cost: 0.41 × $75 + 11.1 × $2 = ~$53.
Epoxy fills the gaps between aggregate chips, typically 30% of the total pour volume. A 24" × 24" tray poured 1/2" deep needs about 0.37 gallons of epoxy with a 10% waste buffer. Deep-pour epoxy is required for anything over 1/4" in a single layer.
| Project Size | Epoxy (gal) | Aggregate (lb) | Est. Cost |
|---|---|---|---|
| 12" × 12" coaster set | 0.09 | 1.8 | $8–$15 |
| 24" × 24" tabletop | 0.37 | 7.3 | $25–$45 |
| 36" × 24" counter | 0.56 | 10.9 | $40–$70 |
Marble chips are the most traditional and affordable at ~$1.50/lb. Recycled glass adds color for ~$2/lb. Mother of pearl creates a premium iridescent finish but costs $8/lb. Most DIY terrazzo uses 3/8" to 3/4" chip sizes mixed together.
For coasters and small items, 1/4" to 3/8" is sufficient. Tabletops and countertops should be 1/2" to 3/4" for structural strength. Standard epoxy can only be poured 1/4" at a time; deep-pour epoxy handles up to 2" in one layer.
After curing 24–72 hours, sand progressively from 80 grit to 400 grit to expose the aggregate pattern. Finish with a polishing compound and buffer for a glossy surface. Wet sanding reduces dust and produces a smoother finish.
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Last Updated: Mar 19, 2026
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