- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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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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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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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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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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Missing Side of a Rectangle from Perimeter CalculatorFind the unknown side of a rectangle from its perimeter and one known side. Uses missing_side = P/2 − known_side. Instant, free, and accurate.
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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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Missing Side of a Rectangle from Area CalculatorFind the missing side of a rectangle from its area and one known side. Enter area and a side to get the other side plus the perimeter instantly.
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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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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 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.
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Rectangular Pool Volume CalculatorCalculate how many gallons of water your rectangular pool holds. Enter length, width, and average depth in feet to get the volume instantly.
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Rectangle Gravel/Mulch Volume CalculatorCalculate how many cubic yards of gravel, mulch, sand or topsoil you need to fill a rectangular area at a given depth. Enter length, width and depth.
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Rectangular Lumber Board Feet CalculatorCalculate board feet of rectangular lumber from length, width and thickness in inches. Multiply by board count for total BF instantly.
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Rectangle Area Moment of Inertia CalculatorCalculate the area moment of inertia (Ix and Iy) of a rectangular cross-section about its centroidal axes from width and height.
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Square Yards of a Rectangle CalculatorConvert a rectangle's length and width in feet to square yards instantly. Enter dimensions to get area in square yards and square feet.
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Number of Tiles to Cover a Rectangle CalculatorCalculate how many rectangular tiles you need to cover a rectangular floor or wall, including a waste allowance for cuts and breakage.
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Rectangle Fence Cost CalculatorEstimate the cost to fence a rectangular yard. Enter length, width, and price per foot to get the perimeter and total fencing material cost instantly.
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Rectangle Area in Acres CalculatorCalculate the area of a rectangular plot in acres from its length and width in feet. Instant feet-to-acres conversion using 1 acre = 43,560 sq ft.
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Rectangle Square Footage Cost CalculatorCalculate the total cost of a rectangular area by multiplying its square footage (length × width) by your price per square foot. Fast and free.
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Area of a Rectangle CalculatorCalculate the area of a rectangle instantly with A = length × width. Also returns perimeter and diagonal for any unit you enter.
