Exterior trim material estimator

Soffit & Fascia Calculator

Estimate soffit panel area, fascia board length, stock pieces, waste, and rough material cost from eave and rake measurements. Built for roof-edge trim ordering before the supplier run.

Units

Eave length per side (ft)Eave runs Soffit depth (ft)Extra rake/gable fascia (ft)Waste / cut allowance (%)Panel coverage (ft²)Fascia board length (ft)Cost per panel ($)Cost per fascia board ($)

Soffit panels

Fascia boards

Soffit area

Rough cost

Exterior trim needs product-specific layout

Ventilation requirements, panel orientation, J-channel, frieze details, rake returns, rot repair, gutter removal, and manufacturer coverage can change the final order.

Android App

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Soffit and fascia formula

Soffit area = eave length × soffit depth × eave runs

Soffit panels = soffit area × (1 + waste %) ÷ panel coverage

Fascia length = eave length × eave runs + rake length

Fascia boards = fascia length × (1 + waste %) ÷ stock board length

Sample takeoff

Two 40 ft eaves with 2 ft soffit depth, 16 ft² panel coverage, 24 ft of rake fascia, and 10% waste need about 11 soffit panels and 10 twelve-foot fascia boards.Two 12 m eaves with 0.6 m soffit depth, 1.5 m² panel coverage, 7.2 m of rake fascia, and 10% waste need about 11 panels and 10 fascia boards.

Soffit & Fascia Calculator FAQ

How does this soffit and fascia calculator work?+

It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Match the panel coverage, vented/unvented mix, and board stock length to the product you plan to buy.It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Match the panel coverage, vented/unvented mix, and board stock length to the product you plan to buy.

Should I use the default waste value?+

Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.

Is this a bid or code approval?+

No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.