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Deck Board Estimator

Estimate deck board count and linear footage from deck dimensions, board width, gap, and stock length.

Author

Prof. Tomoko Sato

Woodworking editorial contributor

Japanese behavioral economist at the London School of Economics, researching nudge theory applications in public health

Reviewed by

Dr. Emeka Nwosu

Woodworking content reviewer

Nigerian legal scholar with an SJD from Yale, focused on international trade law and African continental free trade agreements

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

On this page

  1. Reference values
  2. Calculator
  3. Reference table
  4. FAQs
  5. Methodology and review
  6. Related conversions

12 ft × 8 ft deck, 3.5 in board, 8 ft stock =

41 board(s) needed

Representative value from the Deck Board Estimator reference table.

Reference Values

Browse 96 reference values with individual detail pages for quick lookup.

Browse all reference values

Deck Board Estimator

Estimate deck board quantity and linear footage for a rectangular deck layout.

Estimated Board Count

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Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Deck Board Estimator Reference
Deck ScenarioBoard CountBoard RowsLinear Feet
8 ft × 8 ft deck, 3.5 in board, 8 ft stock27 board(s) needed27216
8 ft × 8 ft deck, 3.5 in board, 12 ft stock18 board(s) needed27216
8 ft × 8 ft deck, 3.5 in board, 16 ft stock14 board(s) needed27216
8 ft × 8 ft deck, 5.5 in board, 8 ft stock18 board(s) needed18144
8 ft × 8 ft deck, 5.5 in board, 12 ft stock12 board(s) needed18144
8 ft × 8 ft deck, 5.5 in board, 16 ft stock9 board(s) needed18144
8 ft × 10 ft deck, 3.5 in board, 8 ft stock34 board(s) needed34272
8 ft × 10 ft deck, 3.5 in board, 12 ft stock23 board(s) needed34272
8 ft × 10 ft deck, 3.5 in board, 16 ft stock17 board(s) needed34272
8 ft × 10 ft deck, 5.5 in board, 8 ft stock22 board(s) needed22176
8 ft × 10 ft deck, 5.5 in board, 12 ft stock15 board(s) needed22176
8 ft × 10 ft deck, 5.5 in board, 16 ft stock11 board(s) needed22176
8 ft × 12 ft deck, 3.5 in board, 8 ft stock40 board(s) needed40320
8 ft × 12 ft deck, 3.5 in board, 12 ft stock27 board(s) needed40320
8 ft × 12 ft deck, 3.5 in board, 16 ft stock20 board(s) needed40320
8 ft × 12 ft deck, 5.5 in board, 8 ft stock26 board(s) needed26208
8 ft × 12 ft deck, 5.5 in board, 12 ft stock18 board(s) needed26208
8 ft × 12 ft deck, 5.5 in board, 16 ft stock13 board(s) needed26208
8 ft × 14 ft deck, 3.5 in board, 8 ft stock47 board(s) needed47376
8 ft × 14 ft deck, 3.5 in board, 12 ft stock32 board(s) needed47376
8 ft × 14 ft deck, 3.5 in board, 16 ft stock24 board(s) needed47376
8 ft × 14 ft deck, 5.5 in board, 8 ft stock30 board(s) needed30240
8 ft × 14 ft deck, 5.5 in board, 12 ft stock20 board(s) needed30240
8 ft × 14 ft deck, 5.5 in board, 16 ft stock15 board(s) needed30240
10 ft × 8 ft deck, 3.5 in board, 8 ft stock34 board(s) needed27270
10 ft × 8 ft deck, 3.5 in board, 12 ft stock23 board(s) needed27270
10 ft × 8 ft deck, 3.5 in board, 16 ft stock17 board(s) needed27270
10 ft × 8 ft deck, 5.5 in board, 8 ft stock23 board(s) needed18180
10 ft × 8 ft deck, 5.5 in board, 12 ft stock15 board(s) needed18180
10 ft × 8 ft deck, 5.5 in board, 16 ft stock12 board(s) needed18180
10 ft × 10 ft deck, 3.5 in board, 8 ft stock43 board(s) needed34340
10 ft × 10 ft deck, 3.5 in board, 12 ft stock29 board(s) needed34340
10 ft × 10 ft deck, 3.5 in board, 16 ft stock22 board(s) needed34340
10 ft × 10 ft deck, 5.5 in board, 8 ft stock28 board(s) needed22220
10 ft × 10 ft deck, 5.5 in board, 12 ft stock19 board(s) needed22220
10 ft × 10 ft deck, 5.5 in board, 16 ft stock14 board(s) needed22220
10 ft × 12 ft deck, 3.5 in board, 8 ft stock50 board(s) needed40400
10 ft × 12 ft deck, 3.5 in board, 12 ft stock34 board(s) needed40400
10 ft × 12 ft deck, 3.5 in board, 16 ft stock25 board(s) needed40400
10 ft × 12 ft deck, 5.5 in board, 8 ft stock33 board(s) needed26260
10 ft × 12 ft deck, 5.5 in board, 12 ft stock22 board(s) needed26260
10 ft × 12 ft deck, 5.5 in board, 16 ft stock17 board(s) needed26260
10 ft × 14 ft deck, 3.5 in board, 8 ft stock59 board(s) needed47470
10 ft × 14 ft deck, 3.5 in board, 12 ft stock40 board(s) needed47470
10 ft × 14 ft deck, 3.5 in board, 16 ft stock30 board(s) needed47470
10 ft × 14 ft deck, 5.5 in board, 8 ft stock38 board(s) needed30300
10 ft × 14 ft deck, 5.5 in board, 12 ft stock25 board(s) needed30300
10 ft × 14 ft deck, 5.5 in board, 16 ft stock19 board(s) needed30300
12 ft × 8 ft deck, 3.5 in board, 8 ft stock41 board(s) needed27324
12 ft × 8 ft deck, 3.5 in board, 12 ft stock27 board(s) needed27324
12 ft × 8 ft deck, 3.5 in board, 16 ft stock21 board(s) needed27324
12 ft × 8 ft deck, 5.5 in board, 8 ft stock27 board(s) needed18216
12 ft × 8 ft deck, 5.5 in board, 12 ft stock18 board(s) needed18216
12 ft × 8 ft deck, 5.5 in board, 16 ft stock14 board(s) needed18216
12 ft × 10 ft deck, 3.5 in board, 8 ft stock51 board(s) needed34408
12 ft × 10 ft deck, 3.5 in board, 12 ft stock34 board(s) needed34408
12 ft × 10 ft deck, 3.5 in board, 16 ft stock26 board(s) needed34408
12 ft × 10 ft deck, 5.5 in board, 8 ft stock33 board(s) needed22264
12 ft × 10 ft deck, 5.5 in board, 12 ft stock22 board(s) needed22264
12 ft × 10 ft deck, 5.5 in board, 16 ft stock17 board(s) needed22264
12 ft × 12 ft deck, 3.5 in board, 8 ft stock60 board(s) needed40480
12 ft × 12 ft deck, 3.5 in board, 12 ft stock40 board(s) needed40480
12 ft × 12 ft deck, 3.5 in board, 16 ft stock30 board(s) needed40480
12 ft × 12 ft deck, 5.5 in board, 8 ft stock39 board(s) needed26312
12 ft × 12 ft deck, 5.5 in board, 12 ft stock26 board(s) needed26312
12 ft × 12 ft deck, 5.5 in board, 16 ft stock20 board(s) needed26312
12 ft × 14 ft deck, 3.5 in board, 8 ft stock71 board(s) needed47564
12 ft × 14 ft deck, 3.5 in board, 12 ft stock47 board(s) needed47564
12 ft × 14 ft deck, 3.5 in board, 16 ft stock36 board(s) needed47564
12 ft × 14 ft deck, 5.5 in board, 8 ft stock45 board(s) needed30360
12 ft × 14 ft deck, 5.5 in board, 12 ft stock30 board(s) needed30360
12 ft × 14 ft deck, 5.5 in board, 16 ft stock23 board(s) needed30360
16 ft × 8 ft deck, 3.5 in board, 8 ft stock54 board(s) needed27432
16 ft × 8 ft deck, 3.5 in board, 12 ft stock36 board(s) needed27432
16 ft × 8 ft deck, 3.5 in board, 16 ft stock27 board(s) needed27432
16 ft × 8 ft deck, 5.5 in board, 8 ft stock36 board(s) needed18288
16 ft × 8 ft deck, 5.5 in board, 12 ft stock24 board(s) needed18288
16 ft × 8 ft deck, 5.5 in board, 16 ft stock18 board(s) needed18288
16 ft × 10 ft deck, 3.5 in board, 8 ft stock68 board(s) needed34544
16 ft × 10 ft deck, 3.5 in board, 12 ft stock46 board(s) needed34544
16 ft × 10 ft deck, 3.5 in board, 16 ft stock34 board(s) needed34544
16 ft × 10 ft deck, 5.5 in board, 8 ft stock44 board(s) needed22352
16 ft × 10 ft deck, 5.5 in board, 12 ft stock30 board(s) needed22352
16 ft × 10 ft deck, 5.5 in board, 16 ft stock22 board(s) needed22352
16 ft × 12 ft deck, 3.5 in board, 8 ft stock80 board(s) needed40640
16 ft × 12 ft deck, 3.5 in board, 12 ft stock54 board(s) needed40640
16 ft × 12 ft deck, 3.5 in board, 16 ft stock40 board(s) needed40640
16 ft × 12 ft deck, 5.5 in board, 8 ft stock52 board(s) needed26416
16 ft × 12 ft deck, 5.5 in board, 12 ft stock35 board(s) needed26416
16 ft × 12 ft deck, 5.5 in board, 16 ft stock26 board(s) needed26416
16 ft × 14 ft deck, 3.5 in board, 8 ft stock94 board(s) needed47752
16 ft × 14 ft deck, 3.5 in board, 12 ft stock63 board(s) needed47752
16 ft × 14 ft deck, 3.5 in board, 16 ft stock47 board(s) needed47752
16 ft × 14 ft deck, 5.5 in board, 8 ft stock60 board(s) needed30480
16 ft × 14 ft deck, 5.5 in board, 12 ft stock40 board(s) needed30480
16 ft × 14 ft deck, 5.5 in board, 16 ft stock30 board(s) needed30480

Frequently Asked Questions

Common questions about Deck Board Estimator, formulas, and typical use cases.

What does this deck estimator calculate?

It estimates board rows, total linear footage, and total board count from deck size, board width, board gap, and stock length.

Why include board gap in the calculation?

Deck gaps affect how many rows fit across deck width, so they change total board count.

Does this include waste and defects?

No. Add extra material for cuts, sorting, defects, and board-selection preferences.

Can this estimate fasteners too?

Not directly. You can use row count and joist layout to estimate screw quantities separately.

Methodology and Review

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

Editorial metadata (author, reviewer, and update date) is rendered on the page and in structured data. See our editorial policy, review process, and corrections policy.

For compliance-sensitive work, verify final values against project requirements, governing standards, and manufacturer documentation.