Construction

Shiplap Calculator

Estimate shiplap boards for a wall.

Wall area

Board face width

Board length

Waste (%)

Calculated Output

Boards needed (boards) 2,641

Formula: boards = area × (1+waste) ÷ (face width/12 × length)

Step-by-Step Breakdown

1. Values used:

2. Wall area = 200

3. Board face width = 1

4. Board length = 1

5. Waste = 10 %

7. Boards needed = 2,641boards

Did this calculator solve your problem today?

The math behind it

boards = wall area × (1 + waste) ÷ each board's coverage (face width/12 × length).

200 ft², 5.5 in × 8 ft boards, 10% → 61 boards.

Face width?

Use the exposed width, not the full board width.