Six calculator guides that show how the numbers work
Asphalt, concrete slab, tile, retaining wall, board foot and sand now have complete guides with measurement steps, worked examples, reference tables, diagrams and sources.
Explore a complete calculator guide
Measure, calculate and check your order
Each guide explains the required measurements, units and formula, then walks through an example. Reference tables are calculated from the same functions used by the calculator, so the explanation and tool stay consistent.
Photos and technical diagrams clarify the project, while the buying checklist separates net quantities from allowances and order rounding. Product yields, package sizes and supplier information stay explicit rather than becoming universal assumptions.
Find the guide for your project
The six guides include common questions, dated primary sources and the limits of each estimate. They were checked in light and dark themes on desktop and mobile, including keyboard access to tables.
A closer look
This milestone was documented on October 23, 2026 and added to the public history on October 23, 2026 at 10:12 PM GMT-3. Screenshots show the development state at the time. About this alpha history.