Area Calculator

  • 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 in² and get ft² using the formula ft² = in² ÷ 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.
  • Square Feet to Square Yards Converter
    Convert square feet to square yards instantly. Divide ft² by 9 to get yd². Free, accurate area converter for flooring, carpet, and landscaping projects.
  • Roof Area Calculator
    Calculate the true surface area of a pitched roof from building footprint and pitch (rise/run). Get square feet and roofing squares instantly.
  • Square Feet to Square Inches Converter
    Convert square feet to square inches instantly. Just multiply by 144. Fast, accurate area unit converter with formula and worked examples.
  • Stadium Calculator
    Calculate the area and perimeter of a stadium (discorectangle) shape from its radius r and straight side length a. Free geometry calculator.
  • Sod Calculator
    Free sod calculator: enter your lawn length, width, waste %, and roll coverage to find total square feet, square yards, and rolls of sod needed.
  • Regular Polygon Calculator
    Calculate the area, perimeter, apothem, circumradius and angles of any regular polygon from its number of sides and side length.
  • Rhombus Calculator
    Free rhombus calculator. Enter the two diagonals to find the area, side length and perimeter instantly using area = (d₁×d₂)/2.
  • Isosceles Triangle Calculator
    Calculate the area, altitude, perimeter, base angles and vertex angle of an isosceles triangle from its equal side length and base.
  • Parallelogram Calculator
    Calculate the area and perimeter of a parallelogram from its base, height, and side. Free, instant geometry calculator with formulas and examples.

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