Guides

Plain-English guides to planning a project — how much material to buy, how to measure, and the rules of thumb the pros use. Each one links to the calculator that does the math for you.

• How Many Bags of Concrete Are in a Cubic Yard?How many 80, 60, and 40-lb bags of concrete make a cubic yard, when bags beat ready-mix, and how to estimate your pour — with a clear worked example.
• How Much Gravel Do I Need? A Driveway GuideHow to figure out how much gravel you need for a driveway, path, or drainage project — depths, coverage, and the yards-to-tons conversion, with a worked example.
• How Much Mulch Do I Need? Depth & CoverageHow to figure out how much mulch you need — the right depth, how many bags make a yard, coverage per yard, and when bulk beats bags — with a worked example.
• How to Measure Roof Pitch From the GroundHow to measure roof pitch with a level and tape from the attic or a ladder, what x/12 means, and how pitch changes your material order — with a reference table.
• Standard Stair Dimensions: Rise and RunThe standard rise and run for stairs, the code limits, the comfort rule that keeps steps from feeling wrong, and how to lay out a stringer — with a worked example.
• What Size Wire Do I Need? An AWG GuideHow to pick the right wire gauge from amps and distance, why long runs need thicker wire, and the ampacity basics — with a clear AWG reference table.