FIELD GUIDES
Field guides
No-fluff writeups on the buying decisions behind the numbers — written the way a foreman explains it, not the way a blog hedges it.
Bags vs Ready-Mix Concrete: The Break-Even Point
How many bags make a cubic yard, where hand-mixing stops making sense, and what a delivered quote actually includes.
How Many Bags of Concrete Per Fence Post? (4×4 & 6×6 Charts)
Bag counts by hole diameter and depth for 4×4 and 6×6 posts — plus the formula, so you can check any post on your line.
5/4×6 vs 2×6 Decking: Which Should You Actually Buy?
Actual dimensions, joist spacing limits, stiffness math, and boards per 100 square feet — the numbers that decide it.
How Many Deck Boards for a 10×10, 12×12, or 16×16 Deck?
Board counts and linear feet for the deck sizes people actually build, with the gap and waste math shown.
How Many Gallons of Paint for a Room? 12×12, 14×14 & 16×16 Charts
Gallons by room size from 10×10 to 20×20, how doors and windows really count, and when one coat is actually enough.
How Much Gravel for a Driveway? Layers, Depths, and Tons
A driveway is three layers, not one depth — tonnage by layer and by size, plus why every source quotes a different coverage per ton.
How Much Mulch Over Old Mulch? (and When to Put It Down)
The yearly job is a 1-inch refresh, not a fresh 3-inch bed — bags and yards by bed size, the buildup problem, and timing.
Pair a guide with the tool
Every guide ends at a calculator — punch your own numbers in instead of trusting a generic average.