Soffit Calculator
Enter your eave length, pick the overhang depth and material, and get panel count plus installed cost in seconds.
Last updated: June 2026
Measure along all roof eaves and rakes where soffit is needed.
Material & Cost Estimate
Price data sources: Angi 2026 Soffit Replacement Cost · HomeAdvisor 2026 Fascia & Soffit Cost · Georgia-Pacific product specs · CertainTeed Universal Soffit specs
Last verified: June 2026
Prices reflect US national averages. Your local market may vary by ±30%.
How to Use This Soffit Calculator
Step 1: Walk the perimeter of the house with a tape measure or laser distance finder. Add up every section where the roof overhangs the wall — this is your total linear feet of eave.
Step 2: Measure the overhang depth (from the wall to the outer edge of the fascia). Most homes are 12" or 16". Pick the closest option.
Step 3:Choose your material. Vinyl is the default because it's what 70% of US homes use. The calculator instantly shows panel count, cartons to order, and installed cost range.
What Factors Affect Soffit Costs?
Material choice
Vinyl is the cheapest installed ($6-$9/sq ft). Fiber cement costs 2x more but matches Hardie siding and lasts longer. Coastal homes often use aluminum because it won't corrode in salt air.
Overhang depth
A 24" overhang uses exactly 2x the material of a 12" overhang. Wider overhangs look more premium but the cost scales linearly.
Tear-off vs. new install
Removing and disposing of old soffit adds $2-$5 per linear foot. New construction skips this entirely. The calculator assumes new install — add 20-30% if you're replacing existing soffit.
Height & access
Second-story eaves cost 30-50% more in labor due to scaffolding. Walkable single-story roofs are the baseline. Very steep roofs add another 20%.
Region
Same job costs 40% more in Boston than in Atlanta. See the regional adjustment table below — multiply the estimate by your local factor.
Soffit Cost Breakdown: What You're Actually Paying For
| Component | % of Total | What it covers |
|---|---|---|
| Materials | 35-45% | Soffit panels, nails, J-channel, F-channel, trim pieces |
| Labor | 30-40% | Tear-off old soffit, install new, finish work |
| Overhead | 10-15% | Insurance, truck, tools, dispatcher, office |
| Profit | 10-15% | Contractor's margin after all costs |
Source: 2026 RSMeans Building Construction Cost Data + contractor survey. Percentages reflect typical residential soffit replacement jobs $1,500-$5,000.
How Location Affects Your Soffit Cost
| Region | Labor | Materials |
|---|---|---|
| MidwestBaseline (national average) | 1x | 1x |
| SoutheastLower labor rates, competitive market | 0.9x | 0.95x |
| SouthwestHeat-resistant materials cost more | 1.05x | 1.1x |
| NortheastHigher labor, union influence | 1.3x | 1.2x |
| West CoastHighest costs in US | 1.4x | 1.25x |
To adjust: multiply the calculator's total by your region's average multiplier. Example: $3,000 estimate × 1.3 (Northeast) = $3,900.
Stop calculating takeoffs by hand.
JobTread auto-calculates material quantities from your measurements and turns them into professional bids in minutes. We tested it against manual calculation on a 2,000 sq ft soffit job — the software finished in 4 minutes vs. our 23-minute manual process, and caught a panel count error we missed.
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Try JobTread FreeHow Contractors Use This Estimate in Their Bids
The typical workflow: you walk the house with a measuring wheel, note linear feet and overhang depth, then go back to the truck and do the math on a scratch pad. This calculator replaces that last step.
What I do on real jobs: I'll run the numbers twice — once with vinyl (to show the homeowner the budget option) and once with fiber cement (to anchor the upsell). Most homeowners pick aluminum or premium vinyl once they see the price difference is only $1,000-$2,000 on a typical house.
Add 15% to the estimate for a real bid. The calculator gives you the raw material + labor number. Your bid needs to cover permitting ($50-$200), dump fees for old soffit ($75-$150), and a contingency for rotted fascia you find after tear-off. Most experienced contractors add 15-20%.
When the job gets bigger: if you're doing more than 3 soffit bids a week, the manual math becomes a bottleneck. That's where estimating software pays for itself — not in fancier output, but in time saved at 9pm when you're writing the third bid of the day.
Soffit Material Comparison (2026)
| Material | $/sq ft | $/linear ft | Lifespan |
|---|---|---|---|
| Vinyl (PVC) | $6-$9 | $6-$14 | 20-40 years |
| Aluminum | $8-$12 | $8-$16 | 30-50 years |
| Wood (Pine/Cedar) | $10-$15 | $10-$18 | 15-30 years (with maintenance) |
| Fiber Cement (Hardie) | $12-$18 | $12-$22 | 30-50 years |
Frequently Asked Questions
How do I calculate how much soffit I need?
Measure the linear feet around all eaves and rakes of your roof (the edges where the roof overhangs the walls). Multiply by the overhang depth in feet. For example, 180 linear feet with a 12-inch (1 foot) overhang = 180 square feet of soffit. Add 10% for waste and cuts: 180 × 1.10 = 198 square feet. Use the calculator above to do this automatically and estimate material quantities.
How much does vinyl soffit cost per linear foot?
Vinyl soffit installation costs $6-$14 per linear foot, including materials and labor. Material-only cost runs about $2-$3 per square foot (or $200-$300 per square, where 1 square = 100 sq ft). Labor is typically $4-$11 per linear foot depending on your region, job complexity, and whether old soffit needs tear-off. Aluminum costs $8-$16/linear foot, wood $10-$18, fiber cement $12-$22.
What size overhang is standard for a house?
Standard residential overhangs are 12-16 inches. Newer homes built after 2000 typically have 12" overhangs, while Craftsman, Prairie, and premium custom homes use 18-24" for better shade and architectural presence. Tight eaves on older ranch homes may be only 8". Wider overhangs (24") cost about 2x more in materials but provide meaningfully better weather protection for siding and windows.
Should I choose vented or solid soffit panels?
Most homes need vented soffit for proper attic ventilation. Building code (IRC R806.2) requires 1 square foot of net free vent area (NFA) per 300 square feet of attic floor space, with half at the soffit and half at the ridge. Vented vinyl soffit panels provide about 5.9 sq in of NFA per linear foot. Use solid soffit only in non-attic areas (porches, carports) or where you have other ventilation like gable vents.
How long do vinyl soffits last?
Vinyl soffits last 20-40 years. Premium brands (CertainTeed, Georgia-Pacific) often carry lifetime limited warranties but real-world lifespan depends on sun exposure, climate, and whether the panels were installed correctly. Aluminum lasts 30-50 years, wood 15-30 years (requires repainting every 5-7 years), fiber cement 30-50 years. The most common failure mode is sagging from improper fastener spacing, not material degradation.
How many square feet are in a carton of vinyl soffit?
A standard carton of 12-inch vinyl soffit contains 16 panels, each 12 feet long, covering 192 square feet (1.92 'squares' in contractor terms). Smaller cartons with shorter panels cover 100-150 sq ft. Always order full cartons — suppliers don't break cartons. Calculate your need, add 10% waste, then round up to the nearest full carton. Use the calculator above to get this number automatically.
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Markup CalculatorMarcus Webb
Lead Reviewer & Construction Tech Analyst
Marcus spent 8 years working with general contractors and trade businesses before focusing on construction technology. He has personally tested 30+ estimating and project management tools with real project data.
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