Home project calculators

Work out how much concrete, gravel, mulch, lumber, paint or shingles to buy before you head to the store. Every result shows the math, and most come with a rough cost.

Concrete calculator

Concrete needed

1.23 cubic yards

33.3 cubic feet. With 10% extra, order 1.36 yards or 62 bags of 80 lb mix.

Area100 sq ft
Volume33.3 cu ft (1.23 cu yd)
80 lb bags62 (about $403)
60 lb bags82
40 lb bags123
Ready-mix to order1.5 yd (about $248 before delivery fees)
Weight of the slab2.4 tons

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