Soffit layout planner

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One rectangular soffit zone

Starting values are an editable example. Measure each zone separately; trim, vents and openings are not deducted.

Nominal / product label

Eave run (ft; max 500)Projection (ft; max 100)Actual exposed board face (in; max 24)Additional reveal / gap (in; max 4)Available stock length (ft; max 40)Saw kerf per piece (in; max 1)Trim allowance per stock end (in; max 12)Extra stock allowance (%)

Board direction

For a profile quoted by effective installed coverage, enter that coverage as the face and set additional reveal to zero. Do not subtract the tongue twice.

Layout study

52courses

156.0LF of board runs

20stock boards incl. allowance

Gross face area: 72.0 ft²
Final course face before edge clearances: 1.13 in
End joints per course under this cutting assumption: 0
End joints across all courses: 0
Repeat pieces per stock board: 3
Usable stock after end trimming: 143.5 in
Base stock boards before allowance: 18

Conservative cutting count: one kerf per finished piece; trim deducted at both stock ends. Long courses use separate stock for each segment; offcuts are not shared between courses. End-trim allowance includes all material removed while preparing each end. This is not a cutting optimization, fastener schedule or support design. Verify narrow final courses and every joint location; extra stock allowance does not make an impossible cut fit.

Temporary working record. Export before leaving; your inputs are not saved to an account.

How the courses are counted

Courses = round up [(cross-run span + gap) ÷ (exposed face + gap)]. Every result keeps the board label separate from its actual covering face.

Check effective coverage before ordering ↗