Measure first.
Buy smarter.
Fast, accurate calculators for paint, tile, flooring, concrete, landscaping and more—backed by visible formulas and practical DIY guidance.
Paint Calculator
Estimate paintable wall area and gallons for your room.
Calculate paint →
Start with the essentials
Paint Calculator
Estimate wall paint and total gallons for a room.
Open calculator →Tile Calculator
Calculate tile quantity, waste allowance and estimated cost.
Open calculator →Flooring Calculator
Estimate flooring area, waste and whole boxes to purchase.
Open calculator →Concrete Calculator
Calculate concrete volume in cubic yards and approximate bag count.
Open calculator →Mulch Calculator
Estimate cubic yards of mulch from bed dimensions and depth.
Open calculator →Square Footage Calculator
Calculate area in square feet or square meters.
Open calculator →Learn. Plan. Build with confidence.
How Much Paint Do I Need for a Room?
Estimate wall area, coats and gallons without overbuying.
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How Much Extra Tile Should You Buy?
Choose a sensible tile waste allowance for cuts, breakage and patterns.
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How to Calculate Square Footage for Flooring
Measure rooms, closets and irregular spaces before ordering flooring.
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How Much Concrete Do I Need?
Convert slab dimensions and thickness into cubic yards.
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How Much Mulch Do I Need?
Estimate mulch volume from bed area and desired depth.
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How to Measure an Irregular Room
Use a rectangle-by-rectangle method for awkward floor plans.
Read guide →
Every estimate shows its working.
We believe in transparency. See the formulas, assumptions and rounding rules behind every result.