One of many good siding calculators is located at RemodelingCalculator.org. This site houses a calculator that prompts the user to enter different variables such as the house's length, the number of levels and the number of windows in order to deliver an estimate of the siding needed.
The costs of installing vinyl siding on an average two story home range from $2 to $7 per square foot. This means a total project cost ranges from $6,000 to $13,000. Wood siding is slightly more expensive with the cost per square foot ranging from $5 to $8 and the total project cost ranging from $13,000 to $22,000.