Area Calculator

  • Area Unit Conversion Calculator
    Convert any area between metric (m2, hectare, are), imperial/US (acre, sq ft, sq mi) and traditional Japanese units (tsubo, se, tan, cho) at once.
  • Trapezoid Calculator
    Calculate the area of a trapezoid instantly from its two parallel bases (a, b) and height (h). Also returns the median. Free, fast, and accurate.
  • Area Conversion Calculator
    Convert area between mĀ², cmĀ², kmĀ², ftĀ², inĀ², ydĀ², miĀ², hectares and acres instantly. Free, accurate area unit converter with the exact formula.
  • Rhombus Area, Perimeter and Vertex Angles from Diagonals
    Enter the two diagonals of a rhombus to instantly compute its area, perimeter, and both interior vertex angles. Universal geometry tool with worked example.
  • Annulus (Ring) Calculator
    Calculate the area and perimeter of an annulus (ring) from its outer and inner radii using Area = Ļ€(RĀ² āˆ’ rĀ²) and circumference 2Ļ€(R + r).
  • Parallelogram Area from Two Sides and Included Angle
    Compute the area and perimeter of a parallelogram from two adjacent sides and the included angle (degrees or radians). Free, instant, accurate.
  • Parabolic Segment (Arch) Area and Arc Length Calculator
    Compute the area and arc length of a parabolic segment (arch) from its height a and chord length b. Exact geometric formulas with worked examples.
  • Ancient Roman Length Converter
    Convert ancient Roman lengths (Roman mile, passus, Roman foot) into modern statute miles, feet, and meters using the standard 1479 m per Roman mile.
  • Circular Segment Area from Central Angle Calculator
    Compute the area, arc length, and chord length of a circular segment from its radius and central angle (degrees or radians). Free, precise geometry tool.
  • Triangle Area from Three Sides (Heron's Formula) Calculator
    Calculate the area of any triangle from its three side lengths using Heron's formula. Enter sides a, b and c in the same unit and get the area instantly.
  • Triangle Area from Two Sides and Included Angle
    Compute a triangle's area, perimeter and height from two sides and the included angle. Uses S = (1/2)ab sin(theta) plus the law of cosines. Degrees or radians.
  • Circle Area and Circumference Calculator
    Calculate 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.
  • Triangle Area Calculator (Base and Height)
    Compute the area of a triangle from its base length and perpendicular height using S = 1/2 x a x h. Unit-agnostic; fast and accurate.
  • Square Area and Perimeter Calculator
    Compute 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.
  • Rectangle Area and Perimeter Calculator
    Calculate 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.
  • 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.
  • Acres to Square Feet Converter
    Convert acres to square feet instantly. Multiply acres by 43,560 to get ftĀ². Free area converter with a worked solution line and formula.
  • Acreage Calculator
    Free 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.
  • Hectares to Acres Converter
    Convert hectares to acres instantly. Enter any area in hectares (ha) and get the equivalent in acres (ac) using the factor 1 ha = 2.47105381 ac.
  • Square Meters to Square Yards Converter
    Convert square meters to square yards instantly. Enter an area in mĀ² and get the equivalent in ydĀ² using the exact 1.19599005 factor.
  • Acres to Hectares Converter
    Convert acres to hectares instantly. Enter any acreage and get the exact hectare value using the factor 1 acre = 0.40468564224 ha.
  • Square Inches to Square Feet Converter
    Convert square inches to square feet instantly. Enter inĀ² and get ftĀ² using the formula ftĀ² = inĀ² Ć· 144. Fast, accurate, and free.
  • Surface Area of a Cuboid Calculator
    Calculate the surface area of a cuboid (rectangular box) from length, width and height using SA = 2(lw + lh + wh). Also shows volume and diagonal.
  • L-Shaped Room Area Calculator
    Calculate the area of an L-shaped room by splitting it into two rectangles. Enter four dimensions to get total square footage or square meters instantly.

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