Siding Calculator - Estimate Cost, Materials & Square Footage
Use this free siding calculator to estimate how much siding you need and what it will cost. Enter your wall dimensions, choose your material, and get instant results for square footage, squares, and total project cost — whether you're working with vinyl, Hardie board, cedar, lap siding, or any other material.
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Estimate only. Prices are approximate and vary by region. This is not a contractor quote. Use for planning purposes only.
Specialized Siding Calculators
Need a more specific tool? Try one of our dedicated siding calculators for detailed material or cost estimates.
Siding Calculator
Calculate how much siding you need based on wall dimensions, openings, and waste factor. Works for Hardie board, vinyl, and wood siding.
Siding Cost Calculator
Estimate the total cost of your siding project including materials, labor, and optional removal of old siding.
Siding Square Footage Calculator
Determine the exact square footage of siding needed by measuring each wall and subtracting openings.
Siding Calculation Formula
Net Area = (Wall Height × Wall Width × Number of Walls) − Openings Area
Total with Waste = Net Area × (1 + Waste Factor%)
Squares = Total with Waste ÷ 100
Total Cost = Total with Waste × Cost per sq ft (material + labor)
Siding Cost per Square Foot (Installed)
| Material | Low Cost | High Cost | Lifespan |
|---|---|---|---|
| Vinyl | $3/sq ft | $7/sq ft | 20-40 years |
| Hardie/Fiber Cement | $5/sq ft | $10/sq ft | 30-50 years |
| Cedar/Wood | $6/sq ft | $12/sq ft | 20-40 years |
| Lap Siding (Wood) | $5/sq ft | $11/sq ft | 20-40 years |
| Metal/Steel | $5/sq ft | $9/sq ft | 40-60 years |
| Stucco | $6/sq ft | $12/sq ft | 50-80 years |
| Engineered Wood | $4/sq ft | $8/sq ft | 20-30 years |
Cost Factors
| Factor | Description | Typical Estimate |
|---|---|---|
| Material | The type of siding you choose is the single biggest cost driver. Vinyl is cheapest; cedar and stucco are premium. | $1–$6/sq ft (material only) |
| Labor | Professional installation typically costs about the same as materials. Complex styles and multi-story homes increase labor. | $2–$6/sq ft |
| Removal & Disposal | Removing and disposing of existing siding adds to the total. Some materials like asbestos require special handling. | $1–$2/sq ft |
| House Height | Two-story and three-story homes cost more due to scaffolding, equipment, and additional labor time. | +15-30% vs single-story |
| Trim & Accessories | Corner posts, J-channels, starter strips, soffits, fascia, and flashing are required but often overlooked in estimates. | +10-20% of material cost |
| Location | Labor and material prices vary by region. Urban areas and coastal regions tend to be more expensive. | ±15-25% from national average |
How to Calculate Siding
- 1. Measure the height and width of each wall in feet.
- 2. Multiply height × width × number of walls to get the total wall area.
- 3. Subtract the area of all doors and windows (openings area) to get the net siding area.
- 4. Apply a waste factor (typically 10-15%) to account for cuts, mistakes, and future repairs.
- 5. Divide by 100 to convert square feet into "squares" — the standard siding unit.
- 6. Multiply by the installed cost per square foot for your chosen material to estimate the total project cost.
Example Calculation
Let's say you're siding a rectangular house with four 10 ft × 40 ft walls using vinyl siding, 80 sq ft of openings, and 10% waste.
- Wall Height: 10 ft
- Wall Width: 40 ft
- Number of Walls: 4
- Openings Area: 80 sq ft
- Waste Factor: 10%
- Material: Vinyl ($3–$7/sq ft installed)
Total wall area = 1,600 sq ft. Net area (minus openings) = 1,520 sq ft. With 10% waste = 1,672 sq ft (16.72 squares). Estimated total project cost: $5,016 – $11,704.
Tips
- Siding is sold in "squares" — one square equals 100 square feet. Always round up when ordering.
- Add 10-15% waste factor for horizontal siding and 15-20% for diagonal or shake patterns.
- Vinyl siding is the most budget-friendly option, while cedar and fiber cement offer premium looks and durability.
- Get at least three contractor quotes and compare them against your own calculations to verify fairness.
- Removal and disposal of old siding typically adds $1–$2 per square foot to the total cost.
- Board and batten and shake/shingle styles generally cost more than standard horizontal lap siding due to increased labor.
- Factor in trim, soffits, fascia, and flashing — these can add 10-20% to your material budget.
- Energy-efficient insulated siding costs more upfront but can reduce heating and cooling bills over time.
Frequently Asked Questions
How much does siding cost for a 1,500 sq ft house?
Siding a 1,500 sq ft house typically costs between $4,500 and $18,000 depending on the material. Vinyl siding is the most affordable at $3–$7 per square foot installed ($4,500–$10,500). Fiber cement (Hardie) runs $5–$10 per sq ft ($7,500–$15,000). Cedar or wood siding costs $6–$12 per sq ft ($9,000–$18,000). These prices include both materials and professional installation. Removal of old siding adds another $1,500–$3,000.
How do I estimate siding for my house?
To estimate siding, measure the height and width of each exterior wall and multiply them together to get the total wall area. Subtract the area of all doors and windows. Add 10-15% for waste and cuts. Divide the result by 100 to get the number of squares needed. For example, a house with four 10×40 ft walls and 80 sq ft of openings would need about 1,520 sq ft net area, or roughly 17 squares including waste.
How much does cedar siding cost?
Cedar siding costs $6 to $12 per square foot installed, making it one of the more premium siding options. The material alone runs $2.50–$6 per square foot, with labor adding another $3.50–$6 per square foot. For a typical 1,500 sq ft home, expect to pay $9,000–$18,000 for cedar siding installation. Cedar offers natural beauty and insect resistance but requires regular maintenance including staining or painting every 3-5 years.
What is lap siding and how much does it cost?
Lap siding (also called clapboard or bevel siding) is a style where boards are installed horizontally with each board overlapping the one below it, creating a sloped surface that sheds water. Wood lap siding costs $5–$11 per square foot installed. Fiber cement lap siding (like HardiePlank) runs $5–$10 per sq ft installed. Vinyl lap siding is the most affordable at $3–$7 per sq ft. Lap siding is the most common siding style in North America due to its classic appearance and effective weather protection.
How much does vinyl siding cost per square foot?
Vinyl siding costs $3 to $7 per square foot installed, including both materials and labor. The material alone costs $1–$4 per square foot, while professional installation adds $2–$3 per square foot. Premium vinyl siding with insulation backing or enhanced profiles can reach $8–$10 per sq ft installed. Vinyl is the most popular siding material in the US because it is affordable, low-maintenance, and available in a wide range of colors and styles.
How much does Hardie board siding cost?
Hardie board (fiber cement) siding costs $5 to $10 per square foot installed. The material runs $1.50–$3.50 per square foot, and labor adds $3.50–$6.50 per square foot because fiber cement is heavier and harder to cut than vinyl. For a 1,500 sq ft home, expect a total cost of $7,500–$15,000. Hardie siding is popular for its durability, fire resistance, and wood-like appearance. It comes with a 30-year warranty and requires repainting every 10-15 years.
How do I calculate siding squares?
One square of siding equals 100 square feet of coverage area. To calculate squares, measure each wall's height and width in feet, multiply to get area, subtract all door and window openings, add 10-15% for waste, then divide the total by 100. For example: if your total net siding area is 1,520 sq ft with 10% waste added (1,672 sq ft), you need approximately 16.72 squares. Always round up to the nearest full square when ordering materials.
Is it cheaper to side a house yourself?
DIY siding installation can save 40-50% on labor costs, which typically represent half the total project price. For vinyl siding on a 1,500 sq ft house, materials alone cost $1,500–$6,000 versus $4,500–$10,500 with professional installation. However, DIY siding requires specialized tools, physical stamina, and knowledge of proper installation techniques. Mistakes can lead to water damage, voided warranties, and costly repairs. Fiber cement and stucco are generally not recommended for DIY due to their weight and complexity.
How long does siding last?
Siding lifespan varies significantly by material. Vinyl siding lasts 20-40 years with minimal maintenance. Fiber cement (Hardie) can last 30-50 years with periodic repainting. Cedar and wood siding lasts 20-40 years but requires regular staining or painting every 3-7 years. Metal/steel siding can last 40-60 years with proper care. Stucco is extremely durable and can last 50-80 years or more. Engineered wood siding typically lasts 20-30 years. Climate, installation quality, and maintenance all significantly impact actual lifespan.
How much does siding replacement cost including removal?
Full siding replacement including removal of old materials costs $4–$14 per square foot depending on the new material chosen. Removal and disposal of existing siding adds $1–$2 per square foot on top of the new siding cost. For a 1,500 sq ft home, total replacement costs range from $6,000 (vinyl, self-removal) to $21,000 (cedar with professional removal). Most homeowners spend $8,000–$15,000 for a complete siding replacement with mid-range materials and professional installation.
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Last updated: June 2026