Epoxy for a 36 × 72 in table: how much resin?

A 36 × 72 in top (18 sq ft) takes 1.4 gal (5.31 L) of mixed epoxy at 1/8 in deep, about 1.54 gal (5.84 L) with 10 % extra.
With the extra, 1:1 is 98.7 fl oz (2.92 L) of each part; 2:1 is 1.03 gal (3.89 L) of Part A and 65.8 fl oz (1.95 L) of Part B.

Mixed epoxy for 36 × 72 in by depth

Mixed epoxy for 36 × 72 in by depth
DepthMixed epoxyWith 10 % extra1:1, each part2:1, Part A / Part B
1/16"89.8 fl oz (2.65 L)98.7 fl oz (2.92 L)49.4 fl oz (1.46 L)65.8 fl oz (1.95 L) / 32.9 fl oz (973 ml)
1/8"1.4 gal (5.31 L)1.54 gal (5.84 L)98.7 fl oz (2.92 L)1.03 gal (3.89 L) / 65.8 fl oz (1.95 L)
1/4"2.81 gal (10.62 L)3.09 gal (11.68 L)1.54 gal (5.84 L)2.06 gal (7.79 L) / 1.03 gal (3.89 L)
1/2"5.61 gal (21.24 L)6.17 gal (23.36 L)3.09 gal (11.68 L)4.11 gal (15.57 L) / 2.06 gal (7.79 L)
1"11.22 gal (42.48 L)12.34 gal (46.72 L)6.17 gal (23.36 L)8.23 gal (31.15 L) / 4.11 gal (15.57 L)
2"22.44 gal (84.95 L)24.69 gal (93.45 L)12.34 gal (46.72 L)16.46 gal (62.3 L) / 8.23 gal (31.15 L)
Volume = length × width × depth (circle: 3.1416 × radius² × depth). 1 in³ = 0.554 fl oz = 16.39 ml; 1 US gal = 231 in³ = 128 fl oz. Part A = total × A ÷ (A + B). Weight = volume × density. The extra covers the cup, the stir stick and drips; wood can soak up more on the first coat.
Estimates. Follow your product’s technical data sheet: its mix ratio, pour depth and cure time win. Work with ventilation, nitrile gloves and eye protection.

Frequently asked questions

How much epoxy for a 36 × 72 table?

A 36 × 72 in top (18 sq ft) takes 1.4 gal (5.31 L) of mixed epoxy at 1/8 in deep, about 1.54 gal (5.84 L) with 10 % extra.

How much epoxy for a 36 × 72 table at 1/4 in?

2.81 gal (10.62 L) of mixed epoxy, 3.09 gal (11.68 L) with 10 % extra. Check the maximum pour depth on your product’s data sheet first.

How many 1 gallon kits for a 36 × 72 table?

At 1/8 in with 10 % extra you mix 1.54 gal (5.84 L): 2 kits of 1 gal (A + B together).