CalcBarn Calculators
Free home & construction calculators — concrete, paint, flooring, mulch and gravel.
Concrete Calculator
Estimate the cubic yards and bags of concrete you need for a slab, footing or patio.
Open calculator →Paint Calculator
Find out how many gallons of paint you need to cover your room's walls.
Open calculator →Flooring Calculator
Work out the square footage and how many boxes of flooring to buy, with waste included.
Open calculator →Mulch Calculator
Find how many cubic yards and bags of mulch you need for your garden beds.
Open calculator →Gravel Calculator
Estimate the cubic yards and tons of gravel needed for a driveway, path or base.
Open calculator →Tile Calculator
Find out how many tiles you need for a floor or wall, including a waste allowance.
Open calculator →Deck Calculator
Find out how many deck boards you need for your deck or patio, with waste included.
Open calculator →Fencing Calculator
Find out how many posts, rails and pickets you need to build your fence.
Open calculator →Drywall Calculator
Find out how many sheets of drywall and how much joint compound you need for your project.
Open calculator →Asphalt Calculator
Estimate the tons of asphalt you need for a driveway, parking lot or path.
Open calculator →Roof Shingles Calculator
Find out how many squares and bundles of shingles you need for your roof, adjusted for pitch and waste.
Open calculator →Why use CalcBarn?
Instant & accurate
Results update as you type, using the same formulas the pros use. No submit button, no waiting.
Free & shareable
No accounts or fees. Copy a link to share your exact estimate with a contractor or client.
Works on the jobsite
Fast, mobile-friendly pages that load instantly even on a phone with poor signal.