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Paint Volume & Coverage CalculatorCalculate how many gallons of paint you need based on wall area, number of coats, and coverage per gallon. Free, fast paint estimator.
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Raised Garden Bed Soil CalculatorCalculate how much soil you need for a raised garden bed in cubic feet, cubic yards, and number of bags. Enter length, width, and depth.
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Fill Dirt CalculatorCalculate how much fill dirt you need in cubic yards and tons. Enter length, width and depth to estimate volume, weight and cost for your project.
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Wheelchair Ramp Slope CalculatorCalculate wheelchair ramp slope ratio, grade percent and incline angle from rise and run. Check against the US ADA 1:12 (8.33%) standard.
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Degrees to Slope Percent CalculatorConvert an angle in degrees to slope percent (grade). Enter degrees to get the percentage rise/run and the equivalent 1-in-N ratio instantly.
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Room Area Calculator (Square Feet & Square Meters)Calculate room area from length and width in feet or meters. Instantly convert between square feet and square meters for any room.
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Wall Paint Surface Area CalculatorCalculate the wall surface area of a room and the paint needed. Deducts doors and windows from the gross area to give net square feet and gallons.
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Manning's Equation Open Channel Flow CalculatorCalculate open channel flow velocity and discharge with Manning's equation using roughness, area, wetted perimeter, and slope (SI units, m³/s).
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Roofing Cost CalculatorEstimate your shingle roof replacement cost. Enter roof area, material and labor cost per square to get total material and labor pricing instantly.
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Deck Cost CalculatorEstimate the total cost to build a deck from its size, material price per sq ft, and labor rate. Get a quick materials and labor breakdown instantly.
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Concrete Cost CalculatorEstimate concrete cost by slab dimensions and price per cubic yard. Enter length, width, thickness and unit price to get volume and total cost.
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Linear Feet CalculatorConvert total square footage to linear feet using board width, and estimate material cost per linear foot. Fast, free flooring & lumber calculator.
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Roof Pitch Angle CalculatorCalculate roof pitch angle in degrees from rise and run. Also gives x-in-12 pitch, slope length and slope percentage for any roof or ramp.
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Snow Load on Roof CalculatorEstimate roof snow load in psf from snow depth and density, or via the ASCE 7 flat-roof formula pf = 0.7·Ce·Ct·Is·pg.
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Deck Area CalculatorCalculate your deck's square footage and the number of decking boards you need, including a waste allowance. Free, instant deck material estimator.
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Concrete Mix Ratio CalculatorCalculate cement, sand and gravel quantities for any concrete mix ratio. Get bags of cement, volumes in m³ and the 1.54 dry-volume factor instantly.
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Tile Quantity CalculatorCalculate how many tiles and boxes you need for a floor or wall. Enter room and tile size plus waste % to get exact tile counts and boxes to buy.
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Roof Area Calculator (with Pitch)Calculate total roof surface area from your building footprint and roof pitch (rise/run). Get sloped area, roofing squares, pitch percent and angle.
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Land Area Calculator (Square Feet to Acres)Convert a plot's length and width in feet to acres instantly. Enter dimensions and get area in acres, square feet, and square meters.
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Roof Surface Area CalculatorCalculate total roof surface area, slope factor, and roofing squares from your building footprint and roof pitch (rise/run). Free and accurate.
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Simply Supported Beam Deflection Calculator (Center Point Load)Calculate the maximum mid-span deflection of a simply supported beam under a central point load using δ = PL³ / (48EI). Free engineering tool.
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Stud Count CalculatorEstimate how many wall studs you need by wall length and on-center spacing (16 or 24 in). Adds corner studs for fast framing material takeoffs.
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Concrete Footing CalculatorCalculate concrete footing volume in cubic yards and cubic feet, plus the number of bags needed. Enter width, depth, length, quantity and waste %.
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Bags of Concrete CalculatorCalculate how many 40, 60, or 80 lb bags of concrete you need for a slab, footing, or pad. Enter length, width, and thickness to get bag count.
