Buying guides
The calculators give you the list; these guides explain the thinking behind it: the yields, the allowances and the conversions, all from the same manufacturer and industry sources. Start with a guide, finish with a buy-list.
How Many Bags of Concrete Do I Need?
Bag yields, a worked 10×10 slab, bags vs ready-mix, and the industry waste figure.
Waste Allowances: How Much Extra to Order
The planning percentages for concrete, tile, lumber and decking, and when to go higher.
How to Measure a Room (Once, for Four Materials)
The same tape measurements turned into flooring boxes, carpet yards, paint gallons and drywall sheets.
Bags vs Bulk: When a Delivery Beats the Bag Aisle
Bags per cubic yard, what a yard weighs, and the 3-yard crossover for mulch, topsoil, gravel and sand.