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Wind Load Pressure CalculatorCalculate dynamic wind pressure with q = ½ρv². Enter wind speed and air density to get pressure in pascals, plus total wind force on an area.
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Two-Support Beam Reaction CalculatorCalculate support reactions R1 and R2 for a simply supported beam with a single point load using static equilibrium equations.
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Fraction to MM Conversion Chart CalculatorConvert any fractional inch to millimeters and decimal inches instantly. Enter a numerator and denominator to get mm, cm and decimal values.
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Rectangular Roof Area CalculatorCalculate the actual sloped surface area of a rectangular roof from its footprint length, width, and pitch angle. Get square feet and roofing squares.
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Fence Posts for a Rectangular Yard CalculatorEstimate how many fence posts you need for a rectangular yard. Enter length, width, and post spacing to get the total posts, corners included.
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Quikrete Bags for Fence Post CalculatorCalculate how many Quikrete or concrete bags you need to set fence posts. Enter hole size, post size, and bag size for total bags and volume.
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Concrete Bag Yield CalculatorCalculate how many bags of concrete you need for a slab or footing from length, width, thickness, bag yield and a waste allowance.
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Paint Area Calculator with Door & Window DeductionsCalculate the true paintable wall area by subtracting door and window openings from the gross wall area. Free, metric, and easy to use.
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Paint Calculator with Multiple CoatsCalculate how much paint you need for a wall with multiple coats. Enter width, height, coats, and coverage to get gallons or liters required.
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Cost per Square Foot EstimatorEstimate total project cost from area and price per square foot. Enter square footage and cost per ft² to get an instant total cost estimate.
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Pavers Needed for a Rectangular Patio CalculatorCalculate how many pavers you need for a rectangular patio. Enter patio and paver dimensions plus waste to get the exact count, area, and overage.
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Decking Boards for a Rectangular Deck CalculatorCalculate how many decking boards you need for a rectangular deck based on deck size, board width, board length and the gap between boards.
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Bricks Needed for a Rectangular Wall CalculatorCalculate how many bricks you need for a rectangular wall from its length, height, brick face size and a waste allowance. Fast and free.
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Grass Seed for a Rectangular Lawn CalculatorCalculate how much grass seed you need for a rectangular lawn from its length, width, and seeding rate. Get the amount in grams and kilograms.
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Pea Gravel CalculatorCalculate how much pea gravel you need in tons and cubic yards. Enter length, width, depth and density to estimate material for your project.
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Stair Stringer Length CalculatorCalculate the minimum stair stringer length from total rise and run using the Pythagorean theorem. Get stringer length, total rise, total run, and stair angle.
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Countertop Square Footage CalculatorCalculate countertop square footage by adding up each section's length × width. Includes waste overage, square meters, and total square inches.
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Paint Quantity CalculatorCalculate how many gallons of paint you need for your walls based on area, number of coats, and coverage per gallon. Fast, free paint estimator.
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Wallpaper Rolls CalculatorCalculate how many wallpaper rolls you need for a room from perimeter, wall height, roll size and pattern repeat. Free, accurate, with rounding for waste.
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Rectangular Plate Weight CalculatorCalculate the weight of a rectangular metal plate or sheet from its length, width, thickness, and material density. Get kg, grams, and pounds instantly.
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Wallpaper Rolls for a Rectangular Wall CalculatorCalculate how many wallpaper rolls you need for a rectangular wall. Enter wall and roll dimensions to get the number of rolls, rounded up.
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R-Value & U-Value Insulation CalculatorCalculate the R-value (thermal resistance) and U-value of insulation from material thickness and thermal conductivity. Add extra layers for total R.
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Yards of Concrete for a Slab CalculatorCalculate how many cubic yards of concrete you need for a slab from length, width, and thickness, plus an optional waste allowance.
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Mulch Bags for a Rectangular Bed CalculatorCalculate how many bags of mulch you need to cover a rectangular garden bed. Enter length, width, depth, and bag size to get the exact bag count.
