Shiplap Calculator

Q: How much extra shiplap should I order?

Add 10% for waste and mistakes. This accounts for cutting errors, damaged boards, and pattern matching requirements during installation.

Q: What about corners and edges?

Calculate corners and edges separately and add to your total. These areas often require special cuts and additional material for proper installation.

Q: How to handle pattern matching?

Consider pattern repeat in your calculations. Some shiplap patterns require extra material to ensure proper alignment and visual continuity.

Q: What about trim pieces?

Measure trim pieces separately and add to your total. Include corner pieces, edge trim, and any decorative elements in your material calculations.

Q: How to handle different board sizes?

Calculate each size separately if using mixed board sizes. This ensures accurate material estimation for projects with varied shiplap dimensions.

Wall Dimensions

Wall Length

Length of the wall

Wall Height

Height of the wall

Number of Windows

Total number of windows

Window Width

Width of each window

Window Height

Height of each window

Number of Doors

Total number of doors

Door Width

Width of each door

Door Height

Height of each door

Shiplap Width

Width of each shiplap board

Shiplap Length

Length of each shiplap board

Calculation Results

Shiplap Calculator: Your Guide to Shiplap Installation

Need to calculate how much shiplap you need for your project? Our Shiplap Calculator helps you determine the exact amount of shiplap boards required for your walls.

Understanding Shiplap Calculations

Shiplap calculations are important for several reasons:

Cost Control: Accurate material estimates
Waste Reduction: Minimize excess material
Installation Planning: Efficient workflow
Budget Management: Cost-effective planning
Pattern Planning: Proper board arrangement

How to Use the Shiplap Calculator

Enter Wall Dimensions: Input length and height
Enter Window Details: Input number and dimensions
Enter Door Details: Input number and dimensions
Enter Shiplap Details: Input board dimensions
Click Calculate: Get shiplap requirements

Shiplap Calculation Formulas

Wall Area:
A = L × H

Window Area:
W = Nw × (Ww × Wh)

Door Area:
D = Nd × (Wd × Hd)

Net Wall Area:
N = A - W - D

Number of Boards:
B = (N × 1.1) / (Sw × Sl)

Where:
A = Wall area
L = Wall length
H = Wall height
W = Window area
Nw = Number of windows
Ww = Window width
Wh = Window height
D = Door area
Nd = Number of doors
Wd = Door width
Hd = Door height
N = Net wall area
B = Number of boards
Sw = Shiplap width
Sl = Shiplap length

Common Shiplap Specifications

Standard Widths:
- 6 inches (15.24 cm)
- 8 inches (20.32 cm)
- 10 inches (25.4 cm)
- 12 inches (30.48 cm)
Standard Lengths:
- 8 feet (2.44 m)
- 10 feet (3.05 m)
- 12 feet (3.66 m)
- 16 feet (4.88 m)
Common Materials:
- Pine
- Cedar
- MDF
- PVC
Installation Methods:
- Nailed
- Screwed
- Adhesive
- Combination

Real-World Examples

Example 1: Standard Living Room Wall

Wall Length: 15 feet
Wall Height: 8 feet
Windows: 2 (3' × 4')
Doors: 1 (3' × 7')
Shiplap Width: 8 inches
Shiplap Length: 8 feet
Results:
- Wall Area: 120 sq ft
- Window Area: 24 sq ft
- Door Area: 21 sq ft
- Net Wall Area: 75 sq ft
- Number of Boards: 15 boards

Example 2: Large Feature Wall

Wall Length: 20 feet
Wall Height: 10 feet
Windows: 3 (3' × 4')
Doors: 2 (3' × 7')
Shiplap Width: 6 inches
Shiplap Length: 12 feet
Results:
- Wall Area: 200 sq ft
- Window Area: 36 sq ft
- Door Area: 42 sq ft
- Net Wall Area: 122 sq ft
- Number of Boards: 25 boards

Frequently Asked Questions

How much extra shiplap should I order?

Add 10% for waste and mistakes.

What about corners and edges?

Calculate separately and add to total.

How to handle pattern matching?

Consider pattern repeat in calculations.

What about trim pieces?

Measure separately and add to total.

How to handle different board sizes?

Calculate each size separately.