- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Circle Area and Circumference CalculatorCalculate the area and circumference of a circle from its radius or diameter. Uses S = pi r squared and L = 2 pi r with high precision.
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Equilateral Triangle Area CalculatorCalculate the area, perimeter, and height of an equilateral triangle from its side length. Free, unit-agnostic geometry tool with worked examples.
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Square Area and Perimeter CalculatorCompute the area and perimeter of a square from its side length. Enter side a to get area S = a squared and perimeter L = 4a instantly.
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Rectangle Area and Perimeter CalculatorCalculate the area and perimeter of a rectangle from its width and height. Enter both sides in the same length unit to get area in unit squared and perimeter.
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Parallelogram Area Calculator (from Base and Height)Find the area of a parallelogram from its base length and perpendicular height using S = a x h. Free, instant, unit-agnostic geometry calculator.
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Acreage CalculatorFree acreage calculator: enter a plot's length and width in feet to instantly find the land area in acres and square feet. 1 acre = 43,560 sq ft.
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Square Meter CalculatorCalculate area in square meters from length and width. Free square meter (m²) calculator with instant square feet conversion.
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Paver CalculatorCalculate how many pavers you need for a patio or walkway. Enter area and paver size, add a waste allowance, and get the exact paver count instantly.
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Plywood CalculatorCalculate how many plywood sheets you need for a wall, floor or roof. Enter surface size, sheet size and waste % for an instant material and cost estimate.
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Paint CalculatorFree paint calculator: enter wall area, doors/windows, coats and coverage to find how many gallons of paint you need for any room.
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Floor Area Ratio (FAR) CalculatorCalculate Floor Area Ratio (FAR) instantly. Divide total building floor area by lot area to check zoning density limits for any project.
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Flooring CalculatorCalculate how many boxes of flooring you need. Enter room dimensions, coverage per box, and waste allowance to get area and box count instantly.
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Carpet CalculatorCalculate how much carpet you need in square feet and square yards, add a waste allowance, and estimate total carpet cost by room size.
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Wall Square Footage CalculatorCalculate wall square footage by multiplying width by height and subtracting door and window openings. Get net paintable or coverable area in sq ft.
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Insulation CalculatorCalculate how many bags of insulation you need. Enter room length, width, and coverage per bag to get total area and bags required, rounded up.
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Stair Carpet CalculatorCalculate how much carpet runner you need for a staircase. Enter steps, tread depth, riser height and width to get length in feet and area in sq ft/yd.
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Wallpaper CalculatorCalculate how many rolls of wallpaper you need from your room perimeter, wall height and roll size. Free, fast and easy to use.
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Square Yard CalculatorCalculate area in square yards from length and width in feet. Free square yard calculator for flooring, carpet, concrete, and landscaping projects.
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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 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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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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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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Basal Area CalculatorCalculate tree basal area from DBH in inches using the forestry constant 0.005454 × DBH². Get per-tree and total stand basal area in square feet.
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Sod CalculatorFree sod calculator: enter your lawn length, width, waste %, and roll coverage to find total square feet, square yards, and rolls of sod needed.
