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Calculate siding square feet with ease. Measure walls, gables, doors, and windows. Add waste and find the siding squares you need.
Planning a siding project? First, know how much siding you need. Buying too little can delay your work. Buying too much can waste money.
Our Square Foot Siding Calculator makes this job easy. It helps you measure walls, gables, doors, and windows. It also adds extra material for waste.
You can use this tool for home siding projects in the USA. It works with feet, inches, yards, meters, and centimeters. It's also useful as a Vinyl Square Foot Siding Calculator for vinyl siding projects.
The calculator uses simple area formulas. It changes all measurements into feet first.
1. Wall Area Formula
Wall Area = Quantity × Length × Height
2. Gable Area Formula
Gable Area = Quantity × (Base × Height ÷ 2)
3. Opening Area Formula
Opening Area = Quantity × Width × Height
4. Net Siding Area Formula
Net Siding Area = Total Wall Area + Total Gable Area − Total Opening Area
5. Siding Area With Waste
Total Siding Area = Net Siding Area × (1 + Waste Percentage ÷ 100)
6. Siding Squares Formula
Siding Squares = Total Siding Area ÷ 100
One siding square covers 100 square feet.
7. Final Order Formula
Whole Squares to Order = Round Up(Siding Squares)
This formula helps you plan your siding purchase.
Our Vinyl Siding Calculator makes the process quick and simple. Follow these steps:
Enter the number of walls, their length, and height.
Add gable details, such as base and height.
Enter the number, width, and height of doors and windows.
Select your measurement unit for each row.
Enter a waste percentage and click Calculate.
The tool shows your net area and total siding needs. It also shows siding squares before and after waste. You can view the final order in whole squares.
Let's say you want to cover a small house.
The house has four walls. Each wall is 30 feet long and 9 feet high. It also has two gables, each 30 feet wide and 8 feet high.
There are 12 windows, each 3 × 4 feet. One door measures 3 × 7 feet. We'll add 10% extra for waste.
Step 1: Calculate Wall Area
4 × 30 × 9 = 1,080 sq ft
Step 2: Calculate Gable Area
2 × (30 × 8 ÷ 2) = 240 sq ft
Step 3: Calculate Openings
Windows = 12 × 3 × 4 = 144 sq ft
Door = 1 × 3 × 7 = 21 sq ft
Total Openings = 165 sq ft
Step 4: Find Net Siding Area
1,080 + 240 − 165 = 1,155 sq ft
Step 5: Add 10% Waste
1,155 × 1.10 = 1,270.5 sq ft
Final Results:
Net siding area: 1,155 sq ft.
Total siding area: 1,270.5 sq ft.
Siding squares: 12.705.
Whole squares to order: 13 squares.
This gives you a clear idea of the siding needed.
Our Square Foot Siding Calculator helps you plan your project with ease. It counts walls, gables, doors, and windows. It also adds your chosen waste rate.
Use it to estimate vinyl siding, compare material needs, and plan your budget. For the best result, measure each wall with care. Always check the pack size before you buy.
Multiply each wall's length by its height. Add the gable area, then subtract doors and windows. Add waste to find the total amount.
One siding square equals 100 square feet of coverage.
A 10% waste allowance is a common starting estimate. Your needs may vary with wall shape, cuts, and siding type.
Yes. You can use this Vinyl Siding Calculator to estimate the area for vinyl siding projects.
Yes. It supports meters and centimeters, along with feet, inches, and yards.
Yes. Enter each opening's quantity, width, and height. The calculator subtracts their total area.