How do I calculate the surface area of a sphere?

The surface area of a sphere is calculated using SA = 4 x pi x r squared, where r is the radius. Simply square the radius, multiply by pi (approximately 3.14159), and then multiply by 4.

What is the formula for the surface area of a cylinder?

The total surface area of a cylinder is SA = 2 x pi x r squared + 2 x pi x r x h, where r is the radius and h is the height. This includes both circular bases (2 x pi x r squared) and the lateral surface (2 x pi x r x h).

How do I find the surface area of a cone?

The surface area of a cone is SA = pi x r squared + pi x r x l, where r is the radius and l is the slant height. The first term is the base area and the second term is the lateral (curved) surface area.

Surface Area Calculator

Cube Surface Area

Side Length (a)

Length (l)

Width (w)

Height (h)

Radius (r)

Height (h)

Radius (r)

Slant Height (l)

Base Side (a)

Slant Height (l)

Triangle Base (b)

Triangle Height (h)

Prism Length (L)

Total Surface Area

SA = 6a^2

Step-by-Step Calculation

1 Enter values to see the calculation steps

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sq ft

sq cm

sq m

Surface Area Formulas

Cube

SA = 6a^2

Rectangular Prism

SA = 2(lw + lh + wh)

Sphere

SA = 4 pi r^2

Cylinder

SA = 2 pi r^2 + 2 pi rh

Cone

SA = pi r^2 + pi rl

Square Pyramid

SA = a^2 + 2al

Triangular Prism

SA = bh + (b + s1 + s2)L