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About
I started CalculatorYard because I kept running into the same problem on every home project: I'd be halfway through tiling a bathroom floor or staining a fence and realize I didn't buy enough material. Or worse, I'd overbuy by a mile and end up with a garage full of leftover bags. Every time, I'd end up Googling “how many tiles for 120 square feet” and clicking through five ad-filled pages before finding a formula I could trust. I figured there had to be a better way, so I built one.
Every calculator on this site uses real formulas — the same math a contractor would use on a job site. Paint coverage is based on 350 square feet per gallon. Concrete converts to cubic yards using actual bag yields. Roofing accounts for pitch multipliers and bundles per square. Where it matters, the calculators add a waste factor for cuts, breakage, and the reality that rooms are never perfectly square. The goal is to give you a number you can take to the store and feel good about, not a vague guess that leaves you short or buried in extras.
Knowing how much material to buy is only half the battle. You also need to know which type of grout to use, what R-value your attic needs, or whether your soil mix should include perlite. That's why each calculator is paired with a resource guide that covers the background — material options, common mistakes, and the kind of context that helps you make better decisions before you start spending money. You can browse all of them on the Resources page.
CalculatorYard is a work in progress. If you find a bug, have a suggestion, or want to see a calculator that doesn't exist yet, I'd genuinely like to hear about it. Drop me a line on the Contact page.
