Epoxy Calculator
Use this epoxy calculator to estimate epoxy resin for floors, counters, or coatings. Enter the coated area, number of coats, coverage rate, waste allowance, and price per gallon to get a planning estimate and rough budget.
Result
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What This Epoxy Calculator Helps You Do
Use this epoxy calculator to estimate epoxy resin for floors, counters, or coatings. Enter the coated area, number of coats, coverage rate, waste allowance, and price per gallon to get a planning estimate and rough budget.
How to Calculate Epoxy Calculator
- Measure the surface - Enter the coated area in square feet. If the space has multiple sections, add them together.
- Set coats and coverage - Enter the number of coats and the product coverage from the label or technical data sheet.
- Add waste and price - Add a little waste for roller loss, spills, and touch-up work. Enter the price per gallon for a rough budget.
- Compare the estimate - Use the adjusted volume when buying product so you have enough for the full coating job.
Epoxy Calculator Formula
| Symbol | Definition | Unit |
|---|---|---|
| Area | Surface area to coat | ft² |
| Coats | Number of epoxy coats | |
| Coverage | Area covered by one gallon | ft²/gal |
| Waste | Extra allowance for spills and touch-ups | % |
Worked Examples
- Area: 200 ft²
- Coats: 2
- Coverage: 250 ft²/gal
- Waste: 8%
Result: Base volume = 1.6 gal. Order volume with waste = 1.73 gal.
The garage floor needs about 1.6 gallons before waste and about 1.73 gallons after the allowance.
- Area: 150 ft²
- Coats: 2
- Coverage: 300 ft²/gal
- Waste: 10%
Result: Base volume = 1 gal. Order volume with waste = 1.1 gal.
A smaller workshop floor can often be coated with a little over one gallon once waste is included.
- Area: 60 ft²
- Coats: 3
- Coverage: 200 ft²/gal
- Waste: 12%
Result: Base volume = 0.9 gal. Order volume with waste = 1.01 gal.
A compact countertop still needs a full gallon container once extra allowance is considered.
- Area: 500 ft²
- Coats: 2
- Coverage: 225 ft²/gal
- Waste: 10%
Result: Base volume = 4.44 gal. Order volume with waste = 4.89 gal.
A bigger floor area quickly pushes the order close to five gallons.
How to Interpret Your Results
| Range | Meaning | Action |
|---|---|---|
| < 1 gal | Small coating project | Check whether a smaller kit or sample pack is enough. |
| 1-3 gal | Typical room or garage job | A standard retail purchase is usually enough. |
| 3-6 gal | Large floor area | Compare kit sizes and verify the chosen coverage rate. |
| > 6 gal | Large commercial work | Break the project into sections and confirm the product schedule. |
Frequently Asked Questions
Sources
Last reviewed: March 2026