Siding Calculator

Calculate siding material needed for vinyl, fiber cement, wood, or stucco. See squares and cost estimate.
Input Method
ft
ft
Stories
Material

Siding Area (incl. waste)

1,373.00 sqft

Squares Needed

13.7

Total Project Cost

$9,609.60

Siding Breakdown

Perimeter160.00 ft
Gross Wall Area1,440.00 sqft
Window Deductions-150.00 sqft
Door Deductions-42.00 sqft
Net Wall Area1,248.00 sqft
With 10% Waste1,373.00 sqft
Squares (100 sqft each)13.7
Material Cost (Vinyl)$5,491.20
Labor Cost$4,118.40
Total Estimate$9,609.60

Use the Siding Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Our 2026 Siding Calculator precisely estimates the material required for your home's exterior, whether it's vinyl, fiber cement, wood, or stucco. This tool is crucial for accurate budgeting and preventing costly over-ordering or project delays, especially with fluctuating material costs projected to increase by 4-6% annually through 2026.

The calculation begins by determining the total wall surface area (length x height for each wall, subtracting window/door areas). This net area is then divided by the coverage per unit of siding material (e.g., square feet per vinyl panel or stucco mix yield), incorporating a standard 10-15% waste factor for cuts and overlaps.

Always measure twice, especially for irregular wall sections or gables. A common mistake is neglecting to account for waste, which can lead to significant shortages. Also, remember that siding accessories like J-channels, corner posts, and trim are not included in the 'square footage' calculation and need to be budgeted separately.

Example: Vinyl Siding for a Small House

  1. 1 Input: House dimensions - 30 ft long x 20 ft wide x 10 ft high walls (total 4 walls). Two windows: 3 ft x 4 ft each. One door: 3 ft x 7 ft. Vinyl siding covers 200 sq ft per box. Cost: $120 per box.
  2. 2 Calculation: ((2 * (30 ft * 10 ft)) + (2 * (20 ft * 10 ft))) - (2 * (3 ft * 4 ft)) - (1 * (3 ft * 7 ft)) = (600 + 400) - 24 - 21 = 955 sq ft. With 12% waste factor: 955 sq ft * 1.12 = 1069.6 sq ft.
  3. 3 Intermediate Result: Total required coverage (including waste) is approximately 1070 square feet.
  4. 4 Final Result: You will need 6 boxes of vinyl siding (1070 sq ft / 200 sq ft/box = 5.35, rounded up to 6). The estimated material cost will be 6 boxes * $120/box = $720 (excluding labor and accessories).

Source: HomeAdvisor · Last updated: April 2026

Frequently Asked Questions

How much does new siding cost in 2026?
Installed siding costs per square foot in 2026: vinyl $4-$8, fiber cement (Hardie) $8-$14, wood $7-$12, engineered wood $6-$10, and stucco $8-$15. A typical 1,500 sq ft of siding costs $6,000-$22,000 installed.
How do I calculate how much siding I need?
Measure the exterior wall area (height times width of each wall), subtract window and door openings, and add 10-15% for waste. Siding is sold by the "square" (100 square feet) or by the piece/plank.
What type of siding lasts the longest?
Fiber cement (Hardie board) and brick last 50+ years with minimal maintenance. Vinyl lasts 20-40 years but can crack or fade. Wood siding lasts 20-40 years with regular painting or staining every 3-7 years.

You might also need

Concrete Calculator

Calculate cubic yards of concrete needed for slabs, columns, and footings. See bags needed and estimated cost.

Paint Calculator

Calculate gallons of paint needed for a room. Accounts for doors, windows, and number of coats.

Flooring Calculator

Calculate flooring material needed and cost for hardwood, laminate, vinyl, tile, or carpet.