Find the variety of squares the siding material needed by beginning the dimensions of the building listed below for a wall surface or gable. Optionally, include the number of doors and also windows to filter the estimate.

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If you’re planning a siding replacement job or prepare to install a new exterior, then the an initial thing you need to do is calculation the dimension of the project. This step will assist with estimating material and also labor costs.

Siding is regularly estimated and priced by the square.

How much is a Square the Siding

Square is a term provided by contractors, installers, and building suppliers and is a unit the measure same to 100 square feet the material.

Vinyl siding is typically estimated by the square come determine how much labor and also material is needed.

One square the siding will certainly cover 100 square feet, and an typical box of vinyl siding contains 2 squares the material.


To uncover the number of squares that siding essential for one installation, measure the width and height of each wall in feet. Multiply the width and also height to acquire the area of the wall surface in square feet.

Divide the square clip by 100 to obtain the number of squares necessary for the wall.

For example, a wall surface that is 40ft wide and 12ft high will need 4.8 squares of material.

40 × 12 = 480480 ÷ 100 = 4.8

How to measure Gable Walls

Finding the square footage of a gable wall surface is comparable to recognize the square footage of a conventional wall. Measure up the width of the gable and also the elevation of the gable, from the basic of the triangle come the peak.

Then main point the width and height, similar to you would certainly to find the area of a rectangle. Finally, divide the area in fifty percent to obtain the last square footage. Divide by 100 to gain the number of squares.

For example, a 20ft vast gable that is 10ft tall will require 1 square of material.

20 × 10 = 200200 ÷ 2 = 100100 ÷ 100 = 1

It is a an excellent idea come order additional material to account for angle cutoffs follow me the leaf of the gable roof.

How to Account because that Doors and Windows

A wall surface with doors and also windows may require under squares of product to cover than a wall with no doors. To account for this overage in material, find the square footage of room that will not be spanned in siding because that the doors and also windows and subtract the from the full square footage of the wall.

For example, an average door is 3ft vast by 7ft high. Subtract 21ft2 from the total square footage to account because that a door. Windows vary in size, and the square footage can be discovered by multiply the length and the width.

It is a great idea come account because that waste throughout installation and also order extr material. That is frequently recommended come order second 10% product to account for cutoffs, trim, and other waste.

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Additional Siding Measurement and also Installation Resources

For clapboard and lap siding, use our clapboard siding calculator to discover the variety of boards required to sheathe the home. The board and also batten siding calculator deserve to estimate the product needed for a board and also batten project.