- Construction Calculator
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Bolt Circle Diameter CalculatorCalculate the center-to-center chord spacing between bolt holes from the bolt circle diameter (BCD) and hole count, or back-solve the BCD.
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Laminate/Flooring Boxes for a Rectangular Room CalculatorCalculate how many boxes of laminate or flooring you need for a rectangular room, including a waste allowance for cuts and mistakes.
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BTU for a Rectangular Room CalculatorCalculate the air conditioner BTU needed to cool a rectangular room. Enter length and width in feet to size your AC unit with the 20 BTU/sq ft rule.
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Concrete Driveway Volume CalculatorCalculate concrete volume in cubic yards and feet for a driveway or slab from length, width and thickness, plus 80 lb and 60 lb bag counts.
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Square Feet per Gallon Paint CalculatorFind out how many gallons of paint you need. Enter wall area, coverage per gallon, and coats to get the exact amount of paint to buy.
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Wall Tile CalculatorCalculate how many wall tiles you need for a backsplash or feature wall. Enter wall size, tile size, and waste % to get the exact tile count.
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Excavation Volume CalculatorCalculate excavation volume in cubic yards, cubic feet, and cubic meters from length, width, and depth. Free dig volume estimator for trenches and foundations.
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Gravel Tons CalculatorEstimate how many tons of gravel you need from area and depth. Converts cubic yards to US tons using gravel density. Free, fast project calculator.
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Square Footage CalculatorCalculate square footage from length and width in feet. Get instant area in sq ft, square yards, and square meters for any room or space.
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Roof Shingles CalculatorCalculate how many shingle bundles and roofing squares you need. Enter roof dimensions and waste % to estimate materials for your roofing project.
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Septic Tank Volume CalculatorCalculate septic tank capacity in US gallons from length, width and liquid depth in feet. Free rectangular tank volume calculator with liters too.
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Deck Board CalculatorFree deck board calculator: enter deck size, board width, length and gap to find how many decking boards and screws you need, with a waste allowance.
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Concrete Slab Cost CalculatorEstimate the cost to pour a concrete slab from length, width and thickness. Adds material, labor and finishing for a fast total project price.
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Asphalt Driveway Cost CalculatorEstimate the cost to pave an asphalt driveway from length, width, thickness, density, price per ton, and labor. Get tons of asphalt and total cost instantly.
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Rectangular Room Square Footage CalculatorCalculate the square footage of a rectangular room instantly. Enter length and width in feet to get area in sq ft, sq yards, and sq meters.
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Rectangular Carpet Cost CalculatorEstimate the cost of carpeting a rectangular room. Enter length, width and price per square metre to get total floor area and carpet cost instantly.
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Rectangular Wall Area CalculatorCalculate the area of a rectangular wall from its length and height, then subtract doors and windows to get the net paintable or tileable area in m².
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Carpet Area CalculatorCalculate how many square yards of carpet you need from room length and width in feet, with an optional waste allowance for cuts and seams.
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Tile Area CalculatorCalculate how many tiles you need for a floor or wall. Enter room and tile dimensions plus a wastage allowance to get the exact tile count.
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Roof Pitch Angle CalculatorConvert roof rise and run into pitch angle in degrees, slope percent, rise:12 pitch, and rafter multiplier. Free, instant roof slope calculator.
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Cubic Feet to Cubic Yards CalculatorConvert cubic feet (ft³) to cubic yards (yd³) instantly. Just divide by 27. Free, accurate volume converter for concrete, mulch, gravel and soil.
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Trench Volume CalculatorCalculate trench excavation volume in cubic yards, cubic feet and cubic meters from length, width and depth. Free, fast and accurate.
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Rectangular Concrete Slab Volume CalculatorCalculate how many cubic yards of concrete you need for a rectangular slab from its length, width, and thickness. Fast, accurate, and free.
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Paint Needed for a Rectangular Wall CalculatorCalculate how many gallons of paint you need for a rectangular wall from its length, height, coverage per gallon, and number of coats.
