Table Top & Flood Coat Epoxy Calculator
Size the seal coat and flood coat for a table top, bar top, or countertop — rectangle or round — with totals in gallons, fluid ounces, liters, or milliliters.
Calculate Your Seal Coat and Flood Coat
Enter your table, bar top, or countertop dimensions and the calculator sizes both layers of a table top pour: the thin seal coat that locks down the surface, and the thick self-leveling flood coat on top — with the totals in gallons and fluid ounces, or liters and milliliters.
Flood coats self-level and run over open edges — waste allowance matters more here than on floors. Check your product's maximum pour depth before combining coats.
How the Table Top & Flood Coat Epoxy Calculator Works
- Choose your measurement unit — inches or centimeters — and the surface shape
- Enter the length and width (or diameter for a round top)
- Pick the flood coat thickness — 1/8 in (3 mm) is the standard single pour
- Set how many flood coats and seal coats you plan to apply
- Keep the waste allowance on — flood coats run over open edges, so real usage is always above the bare math
- Read off the total epoxy needed and the Part A / Part B split for your mix ratio
Examples
Frequently Asked Questions
How much epoxy do I need for a table top?
At the standard 1/8 in flood coat, one US gallon of mixed epoxy covers about 12–13 ft². Add a thin seal coat first — roughly 80 ft² per gallon — plus around 10% waste for edge run-off. A typical 8 ft bar top lands near 2.5 gallons all-in; a small side table needs well under half a gallon, which is why this calculator also shows fluid ounces and milliliters.
What is the difference between a seal coat and a flood coat?
The seal coat is a thin first layer, brushed or squeegeed on, that seals porous wood and stops air escaping as bubbles into your finish. The flood coat is the thick self-leveling pour — typically 1/8 in — that creates the glass-like surface. Skipping the seal coat on raw wood is the most common cause of a bubble-filled flood coat.
How deep can you pour table top epoxy?
Most table top (flood coat) epoxies are formulated for 1/8 to 1/4 in per pour. Pouring thicker traps heat from the curing reaction and can cause cracking, excessive bubbles, or a soft cure. For a deeper build, pour multiple flood coats — or switch to a deep pour epoxy, which cures slowly enough for castings measured in inches, not fractions.
Does the same math work for bar tops and countertops?
Yes — a bar top, kitchen counter, desk, or river-table top coat all use the same seal-plus-flood approach. For L-shaped counters, split the surface into rectangles, run each through the calculator, and add the totals.
Why is my mix ratio important here?
Table top epoxies are usually 1:1 by volume, but some run 2:1. The calculator splits the total into Part A and Part B for whatever ratio your product specifies — measure both parts accurately, because an off-ratio batch may never fully harden.
Important Notes
- One US gallon of mixed epoxy covers about 12–13 ft² at a 1/8 in flood coat
- Flood coats self-level and run over open edges — expect real usage above the bare geometry, especially on narrow pieces
- Mix the seal coat and flood coat as separate batches; a seal coat is applied thin, not poured
- Check your product's maximum pour depth before combining flood coats into one pour
- For castings deeper than 1/4 in (6 mm), use a dedicated deep pour epoxy instead