Surface measurements are calculated by adding the area calculations of all sides of a specific object. The formula to calculate an object's surface measurement differs based on the shape of the object in question. Common surface area formulas include those for calculating the area of a square, a rectangular prism, a sphere and a cylinder.
To calculate the surface area of a cube, multiply the length of one side by itself and multiply that total by six. The formula for this equation is represented by "6a^2," where "a" is the length of the side. To calculate the surface area of a rectangular prism, take the measurements of the three sides that are different lengths and label them a, b and c. Multiply "a" by "b" and then by two, multiply "b" by "c" and then by two, multiply "a" by "c" and then by two, then add those totals together. The formula for this equation is represented as "2ab + 2bc + 2ac."
Two important tips to ensure that the surface area measurement you calculate is correct are to accurately measure all lengths needed for the formula and to not mix up the measurements when inputting them into the formula.