Epoxy Calculator
A 10 by 12 foot floor coated at 10 mils is 0.7481 gal, 2.8317 L, and 95.7507 fl oz. The 1:1 lines show 0.3740 gal each. Three kits cover it when a kit is 0.25 gal.
Last updated . Coating mils are filled in. The rectangle starts at 10 ft by 12 ft. The kit box starts at 0.25 gal, an example size. No brand and no price.
An epoxy calculator and resin calculator for a rectangle or a circle. Enter a pour depth, or a floor coating in mils. The split is by volume: 1:1, 2:1, or parts you type. Kits round the gallon total up to a kit size you type.
The slab under a coating: concrete slab calculator. Room flooring in boxes: flooring calculator. A bagged leveling layer: self-leveling concrete calculator.
Epoxy volume and mix
10 mils is filled in so the volume line can be checked. A mil is 0.001 inch. 0.25 is a kit size filled in for the same check. Neither number is a product. 2:1 means two resin parts and one hardener part.
Results
How the gallons, the split, and the kits are counted
Area is length × width, or π × radius². A coating converts mils to feet by multiplying by 0.001 and dividing by 12. A pour uses the depth you type, after the unit beside that box. Cubic feet become US gallons by × 7.48052, liters by × 28.316846592, and fluid ounces by × 128 on the full gallon figure. Each of those lines is then rounded for display.
The mix is a share of the full gallons, not of the already-rounded gallon line. At 1:1 the two printed halves of the opening example are 0.3740 and 0.3740, which add to 0.7480, while Gallons reads 0.7481. At 2:1 the printed lines are 0.4987 and 0.2494, which add to the same 0.7481. Custom uses resin parts ÷ (resin parts + hardener parts). Kits are the gallon total divided by the kit size, rounded up. An empty kit box leaves the volume on screen and replaces the kit count.
Ten mils and a quarter-gallon kit are sitting in the boxes so the first answer can be checked. Replace both. This page does not name a product, a solids content, or a coverage claim from a can.
Volumes for the opening floor
| Case | Gallons | Liters | Fluid ounces | Kits |
|---|---|---|---|---|
| 10 × 12 ft, 10 mils, kit 0.25 | 0.7481 gal | 2.8317 L | 95.7507 fl oz | 3 |
| Same floor, pour 0.125 in, kit 0.25 | 9.3507 gal | 35.3961 L | 1,196.8832 fl oz | 38 |
| Same pour, kit 1 gal | 9.3507 gal | 35.3961 L | 1,196.8832 fl oz | 10 |
| 8 ft circle, 10 mils | 0.3133 gal | 1.1861 L | 40.1079 fl oz | 2 |
The circle at 10 mils and a 0.25 gal kit is 0.3133 ÷ 0.25, which rounds up to 2 kits. That row uses the same kit box as the opening example.
Worked example
Leave 10 ft by 12 ft, coating 10 mils, mix 1:1, kit 0.25. The area line shows 120.00 ft² · 11.15 m². Gallons reads 0.7481 gal. The thickness is 10 × 0.001 ÷ 12 feet, so the volume is 120 × that thickness = 0.1 cubic feet. 0.1 × 7.48052 = 0.748052 gallons.
Epoxy and resin questions
How much resin is a 10 by 12 floor at 10 mils?
Leave Shape on Rectangle, Thickness entered as on Coating, mils, length 10 ft, width 12 ft, coating 10, Mix by volume on 1:1, and kit size 0.25. The area line shows 120.00 ft² · 11.15 m². Gallons reads 0.7481 gal. Liters reads 2.8317 L. Fluid ounces reads 95.7507 fl oz. Resin reads 0.3740 gal. Hardener reads 0.3740 gal. Kits reads 3.
Why do the two 1:1 lines add to 0.7480 when the total is 0.7481?
The volume is 0.1 cubic feet, and 0.1 × 7.48052 = 0.748052 gallons, which prints as 0.7481. Each half is 0.374026, and each half prints as 0.3740. Two printed halves are 0.7480. The split is taken from the full gallons, then each part is rounded on its own line.
What does a 2:1 mix show on that same floor?
Leave the 10 by 12 floor at 10 mils and set Mix by volume to 2:1 resin to hardener. Gallons stays 0.7481 gal. Resin reads 0.4987 gal. Hardener reads 0.2494 gal. Those two printed lines add back to 0.7481. Kits stays 3 at a 0.25 gal kit.
How much is a 1/8 inch pour on the same rectangle?
Set Thickness entered as to Pour depth and leave the depth at 0.125 in, the length at 10 ft, and the width at 12 ft. Gallons reads 9.3507 gal. Liters reads 35.3961 L. Fluid ounces reads 1,196.8832 fl oz. At the 0.25 gal kit, Kits reads 38. Set the kit size to 1 and Kits reads 10. The pour is 1.25 cubic feet, and 1.25 × 7.48052 = 9.35065, which prints as 9.3507.
What does an 8 ft circle at 10 mils need?
Set Shape to Round, leave the diameter at 8 ft, and set Thickness entered as back to Coating mils at 10. Area reads 50.27 ft² · 4.67 m². Gallons reads 0.3133 gal. Liters reads 1.1861 L. Fluid ounces reads 40.1079 fl oz. The circle uses π × radius², not the rounded 50.27, before the mil thickness is applied.
What if the kit size is empty?
Clear the kit size and leave the floor filled in. Gallons, liters, fluid ounces, resin, and hardener still show. Kits reads: Enter a kit size. Ten in the coating box and 0.25 in the kit box are examples so those lines can be checked. Neither figure is a product, and neither is a floor specification. One mil equals 0.001 inch.
What does a blank size or a blank ratio say?
Blank the length box. The note reads: Enter a length and a width, each greater than zero. On a circle, a blank diameter reads: Enter a diameter greater than zero. A blank coating reads: Enter a coating thickness greater than zero. A blank pour depth reads: Enter a pour depth greater than zero. A custom mix with a blank part reads: Enter resin parts and hardener parts, each greater than zero.