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Concrete slab size chart

Slab	ft²	4 in (yd³)	5 in	6 in	80 lb bags @4 in +10%
10 × 10	100	1.23	1.54	1.85	62
10 × 12	120	1.48	1.85	2.22	74
12 × 12	144	1.78	2.22	2.67	89
10 × 20	200	2.47	3.09	3.70	123
12 × 20	240	2.96	3.70	4.44	147
12 × 24	288	3.56	4.44	5.33	177
16 × 20	320	3.95	4.94	5.93	196
20 × 20	400	4.94	6.17	7.41	245
20 × 24	480	5.93	7.41	8.89	294
24 × 24	576	7.11	8.89	10.67	353
24 × 30	720	8.89	11.11	13.33	440
30 × 30	900	11.11	13.89	16.67	550
30 × 40	1200	14.81	18.52	22.22	734

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