- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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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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Maximum Area Rectangle for a Fixed PerimeterFind the maximum area of a rectangle for a given fixed perimeter. The optimum is always a square with side P/4 and area (P/4)². Free online tool.
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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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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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Rectangular Aquarium Volume in Gallons CalculatorCalculate the volume of a rectangular aquarium in US gallons from its length, width, and height in inches. Also shows cubic inches and liters.
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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.
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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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Square Centimeters of a Rectangle CalculatorCalculate the area of a rectangle in square centimeters (cm²) instantly. Enter length and width in cm to get the area using A = l × w.
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Square Inches of a Rectangle CalculatorCalculate the area of a rectangle in square inches by multiplying length × width. Instant results plus a square-feet conversion.
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Rectangle Square Meters to Square Feet CalculatorConvert a rectangle's area from square meters to square feet. Enter length and width in meters to get the total area in ft² 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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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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Rectangle Pixel Dimensions from Print Size and DPI CalculatorCalculate the pixel width and height a rectangular image needs for a given print size and DPI. Get total pixels and megapixels instantly.
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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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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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Rectangle Height from Width and Aspect RatioFind a rectangle's height from its width and aspect ratio. Enter width and ratio (e.g. 16:9) to get the proportional height instantly.
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Air Volume of a Rectangular Room CalculatorCalculate the air volume of a rectangular room in cubic metres from its length, width and height. Free, instant, and great for HVAC and ventilation sizing.
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Rectangular Raised Garden Bed Soil CalculatorCalculate how much soil to fill a rectangular raised garden bed. Enter length, width and depth to get cubic feet, cubic yards, bags and liters.
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Rectangular Tablecloth Size CalculatorCalculate the right rectangular tablecloth size from your table length, width and desired drop. Get exact cloth dimensions in inches instantly.
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Rectangle Width from Height and Aspect Ratio CalculatorFind a rectangle's width from its height and aspect ratio. Enter height and a ratio like 16:9 to instantly get the matching width. Free online tool.
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Square Feet to Square Yards for a Rectangle CalculatorConvert a rectangle's dimensions in feet to square yards instantly. Enter length and width in feet to get the area in square yards (1 sq yd = 9 sq ft).
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Section Modulus of a Rectangular Beam CalculatorCalculate the elastic section modulus S = b·h²/6 of a rectangular beam cross-section, plus moment of inertia and area. Fast, accurate engineering tool.
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Rectangular Field / Plot Area CalculatorCalculate the area of a rectangular field or plot of land from its length and width in meters, feet, or yards. Get results in m², hectares, and acres.
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Diagonal of a Rectangle CalculatorFind the diagonal of a rectangle from its length and width using d = √(l² + w²). Also shows perimeter and area instantly.
