These calculators find the surface area of common three-dimensional shapes in seconds. Enter your dimensions to get results for a sphere, cone, cube, pyramid, or triangular prism — and choose between total surface area or lateral-only figures where the distinction matters, as with the Cone Lateral Surface Area Calculator and Pyramid Lateral Surface Area Calculator.
Browse the most-popular list to see which shapes come up most in coursework and real projects, or open the Trending tab for what's being used right now. All calculators are free, need no sign-up, and work on any phone, tablet, or desktop.
- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Surface Area of a Pyramid CalculatorCalculate the total surface area of a square pyramid from its base edge and slant height. Free, instant geometry tool with formula and worked example.
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Hemisphere Surface Area CalculatorCalculate the total surface area of a hemisphere (3πr²) plus its curved and flat-base areas from the radius. Fast, accurate, and free.
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Surface Area of a Cylinder CalculatorCalculate the total surface area of a cylinder from its radius and height using A = 2πr² + 2πrh. Free, instant, with lateral and base areas shown.
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Surface Area of a Sphere CalculatorCalculate the surface area of a sphere instantly with A = 4πr². Enter the radius to get surface area, diameter, and volume. Free and easy to use.
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Circle to Sphere Surface Area CalculatorCalculate the surface area of a sphere from its radius using SA = 4πr². Also returns diameter and volume. Fast, free, and accurate geometry tool.
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General Prism Surface Area CalculatorCalculate the total surface area of any prism from its base area, base perimeter, and height using SA = 2·base area + perimeter · height.
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Square Footage CalculatorCalculate square footage from length and width in feet. Get instant area in sq ft, square yards, and square meters for any room or space.
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Body Surface Area (BSA) CalculatorCalculate your Body Surface Area (BSA) in m² using the Mosteller formula from your height (cm) and weight (kg). Fast, accurate clinical tool.
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Surface Area of a Sphere CalculatorCalculate the surface area of a sphere from its radius using SA = 4πr². Instantly get surface area, diameter, and volume for any sphere.
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Carpet Area CalculatorCalculate how many square yards of carpet you need from room length and width in feet, with an optional waste allowance for cuts and seams.
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Tile Area CalculatorCalculate 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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Annulus (Ring) Area CalculatorCalculate the area of an annulus (ring) from its outer and inner radii using A = π(R² − r²). Also shows ring width and circumferences.
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Surface Area of a Cube CalculatorCalculate 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.
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Curved Surface Area of a Cylinder CalculatorCalculate the curved (lateral) surface area of a cylinder instantly using CSA = 2πrh. Enter the radius and height to get the result in square units.
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Floor Area CalculatorCalculate floor area and square footage instantly. Enter length and width to get area in square feet, square meters, and square yards.
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Triangular Pyramid (Tetrahedron) Surface Area CalculatorCalculate 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.
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Swimming Pool Surface Area CalculatorCalculate the water surface area of a rectangular swimming pool from its length and width. Get results in square feet and square meters instantly.
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Cylinder Lateral Surface Area CalculatorCalculate the lateral (curved) surface area of an open cylinder using A = 2πrh. Enter radius and height for instant results in square units.
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Surface Area of a Cylinder CalculatorCalculate the total surface area of a cylinder from its radius and height using SA = 2πr² + 2πrh. See lateral and base areas instantly.
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Roof Surface Area CalculatorCalculate total roof surface area, slope factor, and roofing squares from your building footprint and roof pitch (rise/run). Free and accurate.
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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.
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Triangle Area (SAS) CalculatorFind 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.
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Wall Paint Surface Area CalculatorCalculate 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.
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Circle Area CalculatorCalculate the area of a circle instantly with A = πr². Enter the radius to get area, diameter, and circumference in seconds.
Frequently asked questions
Which 3D shapes does this collection cover?
The collection covers spheres (including the Ball Surface Area Calculator), cones, cubes, square and triangular pyramids, and triangular prisms. Both full surface area and lateral surface area variants are available for cones and pyramids — useful when the base area needs to be excluded from the figure.
What is the difference between total surface area and lateral surface area?
Total surface area includes every face of a shape — the base or bases combined with all side faces. Lateral surface area covers only the side faces, leaving out the base or bases. This distinction matters in practical contexts such as calculating material needed to wrap the sides of a cone or coat the slanted faces of a pyramid.
How accurate are the results?
All formulas follow standard geometric definitions — for example, 4πr² for a sphere and half the perimeter times the slant height for pyramid lateral area. Results are as precise as the dimensions you supply. For construction, packaging, or engineering applications, double-check critical figures against governing standards or have a qualified professional review them.
Do you store the measurements I enter?
No. Calculations run entirely in your browser. No dimensions or computed results are sent to our servers or saved after you close or refresh the page.
Which surface area calculators are most popular?
The list is ordered by real visitor usage — the Sphere and Cone Surface Area calculators tend to rank near the top. Open the Trending tab to see which tools are getting the most attention right now.
