Concrete Block Calculator
Number of concrete masonry units (CMU) for a wall, by courses, with openings and waste.
Construction Calculators
Plan a project with material estimates you can check. These calculators turn measurements into quantities (cubic yards of concrete, tons of gravel, boxes of tile, studs, deck boards, blocks and rebar) and, when you enter your local prices, an estimated material cost.
Every tool shows its formula and lets you change the assumptions, such as waste allowance, material density or bag yield, so the result matches the supplier and product you are actually buying.
Concrete & masonry
Slabs, footings and block walls.
Concrete Footing Calculator
Concrete volume and bag count for pad footings, round piers and continuous strip footings.
Concrete Slab Cost Calculator
Estimate the concrete volume and total cost of a slab, including waste, delivery and labor.
Gravel, stone & landscaping
Volume and tonnage for loose materials.
Gravel Calculator
Convert the area and depth of a driveway, path or base into cubic yards and tons of gravel.
Pea Gravel Calculator
How many bags, cubic yards or tons of pea gravel you need for a path, patio or bed.
River Rock Calculator
Tons, cubic yards and bags of river rock for landscaping beds, with depth based on rock size.
Stone Calculator
Tons of crushed stone, base, screenings or decomposed granite, with material-specific compaction.
Framing, roofing & siding
Studs, rafters, board and batten, and decking.
Board and Batten Calculator
Number of battens, even spacing, boards to buy and backing panels for a board and batten wall.
Deck Calculator
Decking boards, linear footage and screws for a rectangular deck surface.
Rafter Calculator
Rafter length, rise, roof angle and cut angles from span or run and pitch, with overhang.
Stud Calculator
How many wall studs and plates you need for a framed wall, including openings and corners.
Area, tile & reinforcement
Square footage, cubic yards, tile and rebar layouts.
Cubic Yard Calculator
Convert length, width and depth in any units to cubic yards, cubic feet and cubic meters.
Rebar Calculator
Bars, linear footage and weight of rebar for a slab grid at a given spacing.
Square Feet Calculator
Total the square footage of rectangles, triangles and circles, with cut-outs and metric conversion.
Tile Calculator
Work out how many tiles and boxes you need for a floor or wall, including grout joints and waste.
Measure once, convert carefully
Most estimating mistakes come from mixing units: a slab measured in feet with a thickness in inches, or a supplier that quotes per cubic yard while your plans are in metres. Each calculator lets you pick the unit for every dimension and converts internally using exact factors (1 inch = 2.54 cm, 1 cubic yard = 27 cubic feet).
Why waste allowances matter
Real projects lose material to cuts, breakage, uneven subgrade and spillage. Typical allowances range from about 5% for simple rectangular work to 10-15% or more for diagonal tile layouts or irregular excavations. The calculators apply the allowance you choose and show the quantity both before and after it, so you can see the effect.
Estimates are not engineering
These tools estimate quantities. They do not size footings, rafters, rebar or deck framing for loads, and they do not replace local building codes, manufacturer instructions or a licensed engineer. Where structure is involved, the calculator page says so explicitly.
Other calculator categories
Finance Calculators
Loan and car payments, amortization, retirement withdrawals and trip costs.
5 calculatorsTime & Date Calculators
Hours worked, decimal time for timesheets, and elapsed time between dates.
3 calculatorsHealth & Fitness Calculators
Race pace, walking calories and maintenance calories using published equations.
3 calculators