How Much Epoxy Resin Per Square Foot?
Coverage per square foot depends entirely on pour depth. A thin topcoat at 1/16 inch uses half as much resin as a standard flood coat at 1/8 inch. This guide gives you exact fluid ounce and gallon figures at every common thickness — so you can size your order with confidence.
Enter your surface area and depth to get an exact resin amount instantly.
Calculate Your Resin →The Formula
Epoxy coverage per square foot is a direct function of depth. One square foot at 1 inch deep = 144 cubic inches. Divide by 1.805 (cubic inches per fluid ounce) to get fluid ounces:
Example at 1/8 inch: 0.125 × 144 ÷ 1.805 = 9.97 fl oz per sq ft
÷ 128 = 0.0078 gallons per sq ft → 1 gal covers ~128 sq ft at 1/8 in
Resin Per Square Foot at Common Depths
Use this as your primary reference table. Find your pour depth in the left column, then read the coverage rate across the row.
| Pour Depth | fl oz per sq ft | Gallons per 100 sq ft | Sq ft per gallon | Typical Use |
|---|---|---|---|---|
| 1/32 in (0.8mm) | 0.32 fl oz | 0.25 gal | ~400 sq ft | Seal coat / sizing |
| 1/16 in (1.6mm) | 0.63 fl oz | 0.50 gal | ~200 sq ft | Floor topcoat |
| 3/32 in (2.4mm) | 0.95 fl oz | 0.74 gal | ~135 sq ft | Light countertop coat |
| 1/8 in (3.2mm) | 1.27 fl oz | 0.99 gal | ~100 sq ft | Table flood coat, floor basecoat |
| 3/16 in (4.8mm) | 1.90 fl oz | 1.49 gal | ~67 sq ft | Thick table finish, countertop |
| 1/4 in (6.4mm) | 2.53 fl oz | 1.98 gal | ~50 sq ft | Deep flood coat, bar top |
| 3/8 in (9.5mm) | 3.80 fl oz | 2.97 gal | ~34 sq ft | Heavy industrial coat |
| 1/2 in (12.7mm) | 5.06 fl oz | 3.95 gal | ~25 sq ft | Shallow casting pour |
Does not include waste buffer. Add 10% for all surface coating projects.
Total Resin by Area and Depth
Cross-reference your area (rows) against your pour depth (columns) to find the total fl oz needed including a 10% waste buffer.
| Area (sq ft) | 1/32 in | 1/16 in | 1/8 in | 3/16 in | 1/4 in |
|---|---|---|---|---|---|
| 10 sq ft | 4 fl oz | 7 fl oz | 14 fl oz | 21 fl oz | 28 fl oz |
| 25 sq ft | 9 fl oz | 17 fl oz | 35 fl oz | 52 fl oz | 70 fl oz |
| 50 sq ft | 18 fl oz | 35 fl oz | 70 fl oz | 105 fl oz | 140 fl oz |
| 100 sq ft | 35 fl oz | 69 fl oz | 140 fl oz | 209 fl oz | 279 fl oz |
| 200 sq ft | 70 fl oz | 139 fl oz | 279 fl oz | 418 fl oz | 557 fl oz |
| 400 sq ft | 141 fl oz | 277 fl oz | 557 fl oz | 836 fl oz | 1115 fl oz |
| 500 sq ft | 176 fl oz | 347 fl oz | 697 fl oz | 1045 fl oz | 1394 fl oz |
Per-Square-Foot Rates by Project Type
Standard Coverage Rates for Common Projects
| Project Type | Pour Depth | fl oz per sq ft | Coats | Total fl oz / sq ft |
|---|---|---|---|---|
| Epoxy floor (garage) | 1/8 in per coat | 1.27 | 2 | ~2.8 |
| Epoxy floor (basement) | 1/16 in topcoat | 0.63 | 2–3 | ~1.4–1.9 |
| Table flood coat | 1/8 in | 1.27 | 1–2 | ~1.4–2.8 |
| Countertop (standard) | 1/8 in per coat | 1.27 | 2 | ~2.8 |
| Bar top (thick finish) | 1/4 in | 2.53 | 1–2 | ~2.8–5.5 |
| Seal coat (any surface) | 1/32 in | 0.32 | 1 | ~0.35 |
Worked Example: 200 sq ft Basement Floor, 2 Coats
- Area: 200 sq ft
- Coat depth: 1/16 inch each coat (standard thin floor coat)
- fl oz per coat: 200 × 0.63 = 126 fl oz
- 2 coats: 252 fl oz
- Add 10% waste buffer: 252 × 1.10 = 277 fl oz
- Convert to gallons: 277 ÷ 128 = 2.16 gallons → buy 3 gallons
Frequently Asked Questions
How many fl oz of epoxy do I need per square foot?
At 1/16 inch (typical floor topcoat), you need about 0.63 fl oz per square foot. At 1/8 inch (standard table flood coat), that doubles to about 1.27 fl oz per square foot. At 1/4 inch (deep flood or bar top), you need about 2.53 fl oz per square foot.
How much epoxy do I need per square foot for a floor?
Floor coatings are applied at 1/16 inch per coat, which uses 0.63 fl oz per square foot per coat. A 2-coat system uses about 1.4 fl oz per sq ft total — so 100 sq ft needs roughly 0.87–1 gallon for a 2-coat system including the waste buffer.
How do I calculate epoxy per square foot for my project?
Multiply your area by the fl oz-per-sq-ft rate for your chosen depth from the table above. Then divide by 128 to convert to gallons. Add 10% for waste. For example: 200 sq ft at 1/8 inch = 200 × 1.27 = 254 fl oz ÷ 128 = 1.98 gallons + 10% = 2.2 gallons.