Project guides
How to measure, what to watch for and how much to buy, explained with worked examples.
Concrete
Concrete calculator →- Concrete Slab Thickness Guide: Patio, Driveway, Shed, Garage
How thick to pour a concrete patio, driveway, shed pad or garage floor, what each extra inch costs in concrete, and what goes under the slab.
- How Many Bags of Concrete Do You Need per Fence Post?
Bags of concrete per fence post by hole size and depth, for 4x4 and 6x6 posts, with the formula, a worked example for a whole fence and setting tips.
- Tile Waste Factor by Layout: Straight, Diagonal, Herringbone
How much extra tile to buy for straight, offset, diagonal and herringbone layouts, why small rooms waste more, and how waste changes the box count.
- How to Measure an L-Shaped Room (and Other Odd Shapes)
Measure the square footage of L-shaped and irregular rooms by splitting them into rectangles, with diagrams, formulas for odd shapes and a worked example.
Paint
Paint calculator →- How Much Paint for a 12x12 Room? Coverage Chart by Room Size
A 12x12 room with 8 ft walls takes about 2 gallons of paint for two coats. See the coverage chart for 10x10 to 20x20 rooms, with and without the ceiling.