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Calculator.net: Surface Area Calculator
Use these calculator tools to find the surface area, in your choice of units, of a sphere, cone, cube, cylinder, rectangular prism, capsule, ball cap, conical frustum, ellipsoid, or square pyramid. Includes a reference section listing...
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Calculator Soup: Square Pyramid Calculator
Use this calculator to determine the volume, surface area, or other figure for a square pyramid, given the other numbers. Users set their parameters for two known variables of the pyramid and find what the unknown amounts would be.
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Math Prof: Area & Volume of a Square Pyramid
Use the calculator to find the surface area and volume of a square pyramid, then click on the link to see an explanation with examples.