QtyLab

A 10×12 slab 4 in thick takes 74 bags of 80 lb concrete (98 of 60 lb) — 1.63 cubic yards with 10% extra. Bags by thickness, other slab sizes, and bags vs ready-mix.

A 100 ft fence with posts 8 ft apart takes 234 1×6 pickets (buy about 246). Counts for 1×4, 1×6 and 1×8 pickets, gaps, gates, 6 ft spacing, and other fence lengths.

A 5,000 sq ft lawn at 3.2 lb per 1,000 sq ft needs 16 lb of fertilizer. Formula, nitrogen conversion chart, lawn-size chart, and a free calculator.

A 1,000 sq ft lawn needs about 1,100 sq ft of sod with 10% extra, or 3 pallets at 500 sq ft. Pallet chart, piece sizes, and a free sod calculator.

A 100 ft privacy fence at 8 ft spacing needs 14 posts, 13 sections, and about 234 1×6 pickets. Formulas, tables, concrete per post, and a free fence calculator.

A 12×20 driveway at 4 inches needs about 3.26 cubic yards (4.6 tons) of gravel. Formula, coverage chart, waste rules, and a free gravel calculator.

A 12×10 floor needs 132 tiles of 12×12 or 66 of 12×24 with 10% waste. Charts for tiles per 100 sq ft, tiles by floor size, and how many boxes to buy.

A 12×10 room needs about 15 sheets of 4×8 drywall for walls and ceiling. Charts by room size and square footage, sheet sizes, joint compound, and a shopping list.

A 12 x 12 room needs about 2.1 gallons for two coats on the walls: buy 2 gallons plus a quart. Room-size chart, gallons by wall area, quarts vs gallons, and when to prime.

Calculate how many 60 lb or 80 lb concrete bags you need for a slab or footing, with examples and QtyLab’s free concrete calculator.