- Construction Calculator
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Lot Size to Acres CalculatorConvert lot size in square feet to acres instantly. Enter your lot's square footage and get the acreage using the 43,560 sq ft per acre standard.
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Lot Size to Square Feet CalculatorConvert a rectangular lot's length and width in feet into total square feet (and acres) instantly. Free, accurate lot size area calculator.
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Square Feet to Acres CalculatorConvert square feet to acres instantly. Enter any area in sq ft and get the exact acreage using the standard 43,560 sq ft per acre factor.
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BTU CalculatorEstimate the BTU/hr cooling capacity needed for any room. Adjusts for area, ceiling height, insulation, sun exposure, occupants, room type, and climate. Returns recommended AC unit size.
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Board Foot CalculatorCalculate board feet of lumber from thickness, width, and length in inches. Get total board footage and cost for any number of boards instantly.
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Cubic Yard CalculatorCalculate cubic yards from length, width, and depth in feet. Perfect for concrete, soil, mulch, gravel, and landscaping material estimates.
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Gallons per Square Foot CalculatorCalculate how many US gallons of water cover an area at a given depth. Enter square feet and depth in inches to get total gallons instantly.
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Square Yards CalculatorCalculate area in square yards from length and width in feet. Free square yards calculator for flooring, carpet, and landscaping projects.
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Square Feet to Cubic Yards CalculatorConvert square feet and a depth to cubic yards instantly. Perfect for ordering concrete, gravel, mulch, soil and other bulk fill materials.
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Baluster CalculatorCalculate how many balusters (spindles) you need for a railing and the even spacing between them. Enter railing length, baluster width and max gap.
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Board and Batten CalculatorCalculate how many vertical battens you need for a board and batten wall, plus the actual spacing, from wall width, board width and target spacing.
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Brick CalculatorCalculate how many bricks you need for a wall from its dimensions, brick size, mortar joint thickness and a wastage allowance.
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Decking Board CalculatorEstimate how many decking boards you need. Enter deck and board dimensions, board gap, and waste allowance to get a total board count.
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Drywall Sheet CalculatorCalculate how many drywall sheets you need from total wall or ceiling area, sheet size, and a waste allowance. Fast, accurate estimates.
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Fire Glass CalculatorEstimate how many pounds of fire glass you need for your fire pit or fireplace based on its length, width, and the glass depth you want.
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Wall Framing Stud CalculatorCalculate how many wall studs you need based on wall length and stud spacing (12", 16", 24" on center), plus extra studs for doors and windows.
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French Drain CalculatorCalculate how much gravel a French drain needs in cubic yards. Enter trench length, width, and depth to estimate volume and gravel tonnage.
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Limestone CalculatorCalculate how many tons of crushed limestone you need. Enter length, width and depth to get volume in cubic yards and total tonnage.
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Glass Weight CalculatorCalculate the weight of a glass pane or sheet from its length, width and thickness using glass density (default 2.5 g/cm³). Get weight in kg and grams.
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Breaker Size CalculatorCalculate the minimum circuit breaker amperage from load power and voltage, with the 1.25 continuous-load safety factor (US NEC 80% rule).
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Plate Weight CalculatorCalculate the weight of a metal plate or sheet from length, width, thickness and material density. Supports steel, aluminum, copper and custom density.
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Pipe Weight CalculatorCalculate the weight of a hollow pipe from outside diameter, inside diameter, length and material density. Free, fast pipe weight calculator in kg.
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Metal Weight CalculatorCalculate the weight of metal bars, tubes and plates from dimensions and material density. Supports steel, aluminium, copper, brass and stainless.
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Rebar CalculatorFree rebar calculator: enter slab length, width and bar spacing to get the number of bars in each direction, total rebar length and pieces needed.
