The coverage for a gallon of TotalBoat Gelcoat is roughly 12.8 square feet when applied 1/8" thick*, 25.7 square feet when applied 1/16" thick*, 51.3 square feet when applied 1/32" thick*.
A quart of TotalBoat Gelcoat will yield roughly 1/4 the given yield at the specified thickness.
* The noted yield does not account for any waste, or material that is left over on brushes, tools, or in the container. Generally, it's safe to assume 10% less coverage due to waste. Adding solvents or thinners will not increase yield or coverage. The difference in yield for gelcoat with and without wax is considered negligible.