Construction calculator
Deck Calculator
Estimate decking boards and linear feet from deck dimensions, board face width, board length, spacing, and extra allowance.
Deck materials
Deck Calculator
Deck boards
38
Based on 12 ft boards and 10% extra.
Deck area
192 sq ft
Length x width
Linear feet
409.6 ft
Before extra allowance
Order length
450.56 ft
Includes extra allowance
Common Tools Used for Project Measurements
Project calculators usually need room dimensions, surface area, package coverage, or product label values.
Tape measure
Laser distance measurer
Level
Product coverage label
Notebook or floor plan
Keep measurements in one unit while entering values, then use the result as a planning estimate.
Formula
boards = deck area / effective board width / board length x allowance
Joists, beams, posts, stairs, fasteners, picture framing, board direction, and local building codes require separate planning.
Common Examples
| Input | Estimate |
|---|---|
| 16 ft x 12 ft deck | 192 sq ft |
| 5.5 in board with 1/8 in gap | Common planning dimensions |
| 10% extra | Allows for cuts and defects |