Surface Area Calculator

  • Cube Surface Area Calculator
    Enter a cube’s side length to instantly calculate its total surface area (A = 6s²). Quick help for geometry, homework, and simple planning.
  • Annulus (Ring) Area Calculator
    Calculate the area of an annulus (ring) from its outer and inner radii using A = π(R² − r²). Also shows ring width and circumferences.
  • Surface Area of a Rectangular Prism Calculator
    Calculate the surface area of a rectangular prism (cuboid) from its length, width, and height using A = 2(lw + lh + wh). Free and instant.
  • Surface Area of a Square Pyramid Calculator
    Calculate the total surface area of a square pyramid from its base edge and height. Includes base area, lateral area, and slant height instantly.
  • Surface Area of a Cone Calculator
    Calculate the total surface area of a cone from its base radius and height. Get base area, lateral area, slant height and total area instantly.
  • Wall Paint Surface Area Calculator
    Calculate the wall surface area of a room and the paint needed. Deducts doors and windows from the gross area to give net square feet and gallons.
  • Heron's Formula Area Calculator
    Find a triangle's area from its three side lengths using Heron's formula. Enter sides a, b, and c to get the area, semi-perimeter, and perimeter instantly.
  • Right Triangle Area Calculator
    Calculate the area of a right triangle from its two legs using A = ½·a·b. Also returns hypotenuse and perimeter instantly.
  • Regular Hexagon Area Calculator
    Calculate the area of a regular hexagon from its side length using A = (3√3/2)s². Also returns perimeter and apothem instantly.
  • Triangle Area Calculator
    Calculate the area of a triangle from its base and height using A = ½·b·h. Fast, free, and accurate for any unit of measurement.
  • Square Area Calculator
    Calculate the area of a square instantly with A = s². Enter the side length and get area, perimeter, and diagonal in seconds.
  • Circle Area Calculator
    Calculate the area of a circle instantly with A = πr². Enter the radius to get area, diameter, and circumference in seconds.
  • Triangle Area (SAS) Calculator
    Find the area of a triangle from two sides and the included angle (SAS) using A = ½·a·b·sin C. Enter sides a, b and angle C in degrees.
  • Land Area Calculator (Square Feet to Acres)
    Convert a plot's length and width in feet to acres instantly. Enter dimensions and get area in acres, square feet, and square meters.
  • Roof Surface Area Calculator
    Calculate total roof surface area, slope factor, and roofing squares from your building footprint and roof pitch (rise/run). Free and accurate.
  • Surface Area of a Cylinder Calculator
    Calculate the total surface area of a cylinder from its radius and height using SA = 2πr² + 2πrh. See lateral and base areas instantly.
  • Cylinder Lateral Surface Area Calculator
    Calculate the lateral (curved) surface area of an open cylinder using A = 2πrh. Enter radius and height for instant results in square units.
  • Floor Area Calculator
    Calculate floor area and square footage instantly. Enter length and width to get area in square feet, square meters, and square yards.
  • Swimming Pool Surface Area Calculator
    Calculate the water surface area of a rectangular swimming pool from its length and width. Get results in square feet and square meters instantly.
  • Triangular Pyramid (Tetrahedron) Surface Area Calculator
    Calculate the surface area of a triangular pyramid (tetrahedron) from base edge and slant height. Free, instant SA = (√3/4)·a² + (3/2)·a·l calculator.
  • Curved Surface Area of a Cylinder Calculator
    Calculate the curved (lateral) surface area of a cylinder instantly using CSA = 2πrh. Enter the radius and height to get the result in square units.
  • Surface Area of a Cube Calculator
    Calculate the total surface area of a cube from its edge length using SA = 6s². Also shows the area of one face and the cube's volume.
  • Surface Area of a Sphere Calculator
    Calculate the surface area of a sphere from its radius using SA = 4πr². Instantly get surface area, diameter, and volume for any sphere.
  • Tile Area Calculator
    Calculate how many tiles you need for a floor or wall. Enter room and tile dimensions plus a wastage allowance to get the exact tile count.

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