Planning guides

Practical material-planning guidance

Short, focused explanations for the measurements, assumptions, and ordering decisions that sit around the calculators.

Gravel for a driveway

Learn how to measure a driveway, calculate cubic metres or cubic yards, separate layers, and prepare questions for a supplier.

Learn how horizontal plan area, rise over run, and the pitch multiplier produce the sloping area of one rectangular roof plane.

Calculate whole-box quantities and understand the difference between a waste allowance and surplus from box rounding.