Global Araç
Deck Board Count Calculator
Gereken tahta
26
Doğrusal feet
416
Kirişler
13
Tahta maliyeti
$650
En az fireli tahta boyu
8 ft boards — 52 tahta, 0.0 ft kesim firesi.
8 ft
52 tahta
0.0 ft fire
10 ft
52 tahta
104.0 ft fire
12 ft
52 tahta
208.0 ft fire
16 ft
26 tahta
0.0 ft fire
Kirişler 16" aralıklı, 16 ft boyunca. Tahta sayısı tahtaların teras uzunluğuna paralel döşendiğini ve 0.125" boşluk olduğunu varsayar.
Calculate the number of deck boards, total linear feet of lumber, and joist count for a deck-building or deck-replacement project. Enter deck dimensions (length × width), board width (typical 5/4" or 6" nominal — 5.5" actual after milling) and gap spacing (1/8" - 1/4" for wood; up to 3/8" for composite for thermal expansion), and the tool returns:
- Boards needed at standard lengths (8/10/12/16/20 ft), with a recommendation for the length that wastes least lumber given your deck’s dimensions.
- Total linear feet of decking lumber to order.
- Joist count needed underneath at standard 16" on-center spacing (or 12" OC for stronger / heavier loads, 24" OC for lighter applications).
- Approximate cost if you enter price-per-foot for the lumber type.
Why board-length choice matters: matching board length to deck dimension minimizes waste. A 12-foot deck filled with 16-foot boards wastes 4 feet per board; using 12-foot boards wastes nothing. The optimization isn’t always perfect (board lengths come in fixed increments), but the tool tells you which standard length wastes the least for YOUR specific deck. Save 5-15% on lumber cost by picking the right length.
Joist spacing affects deck strength and bounce. 16" OC is the standard for residential decks with typical loads (people walking around, patio furniture, BBQ grill). 12" OC for hot tubs, heavy loads, or softer/thinner decking. 24" OC works for the lightest loads with thicker (5/4 vs 1") decking but isn’t code-compliant in all jurisdictions. Always check local building code before committing — joist spacing requirements vary by structural-grade lumber species (Douglas Fir handles longer spans than Spruce- Pine-Fir).
Nasıl Kullanılır
- Measure your deck (or proposed deck) length and width in feet.
- Pick board nominal width: 5/4 × 6 (the most common composite-deck board), 2 × 6 (thicker pressure-treated lumber), or 1 × 6 (thinner cedar). Actual width is ~0.5-0.75 inches less than nominal.
- Pick gap spacing: 1/8" for tight wood decks, 3/16" for typical, 1/4" for composite (thermal expansion).
- Pick joist spacing: 16" OC standard, 12" OC for heavy loads, 24" OC for light (check local code).
- Read the output: boards needed at each standard length, recommended length for least waste, total linear feet to order, joist count.
- If you have a price per linear foot, enter it for an approximate lumber cost. Doesn't include hardware, joist hangers, or labor.
Ne Zaman Kullanılır
- Planning a new deck build — knowing the lumber order before talking to the supplier.
- Replacing decking on an existing structure (joists stay, board count and length matter).
- Estimating cost as part of a renovation budget.
- Comparing board widths or composite vs wood for the same deck — the calculator gives apples-to-apples lumber comparison.
Ne Zaman Kullanılmaz
- Highly irregular deck shapes (octagonal, multi-level, curved) — the rectangle math breaks. Use a deck-design tool that handles complex geometry.
- Structural design — board count tells you decking needs; it doesn't size joists / beams / posts for load. A structural engineer or experienced builder handles those.
- Permitting / code compliance — local rules vary on joist spacing, decking thickness, railing height, attachment to house. Check with your municipality before building.
Yaygın Kullanım Senaryoları
- Quick calculation during a typical workday
- Pre-decision sanity-check on inputs and outputs
- Educational use — demonstrating the underlying concept
- Onboarding a colleague who needs the same calculation/conversion
Sık Sorulan Sorular
What's the right joist spacing?
16" OC (on-center) is the residential standard for most deck loads. 12" OC for hot tubs, heavy planters, dance-floor-type loads, or thinner decking (under 1" actual thickness). 24" OC for the lightest loads with thicker boards — but check local code; many jurisdictions don't allow 24" for residential decks. Composite decking often requires 12" OC for diagonal patterns (45° herringbone).
Why are board widths different from nominal?
Nominal lumber dimensions describe the rough-cut size before drying and milling. Actual size is smaller: 1×6 nominal = 0.75" × 5.5" actual; 5/4 × 6 = 1" × 5.5" actual; 2×6 = 1.5" × 5.5" actual. Width loss is consistent (~0.5" per 6" nominal) due to milling. Always use ACTUAL dimensions in your calculations.
Composite vs wood — which is cheaper?
Wood: $2-5 per linear foot for pressure-treated, $4-8 for cedar / redwood, $10-20 for tropical hardwoods. Composite (Trex, TimberTech, Fiberon): $4-10 per linear foot. So wood is cheaper upfront. Lifetime cost favors composite: wood needs sealing every 1-3 years (50-200 dollars labor + materials each time), composite needs no maintenance. Over 20 years, composite often wins on total cost of ownership.
How do I figure out wasted boards?
If your deck is 13 feet long and you buy 16-foot boards, each board wastes 3 feet (16 - 13 = 3). For a 13-foot deck, 12-foot boards work IF you can cut and butt-joint without making the deck look bad. The calculator's 'recommended length' picks the option with the least waste assuming you can use full boards — for 13-foot decks, 16-foot might be best despite waste because butt-joints are aesthetically worse.
What about deck-board direction?
Boards typically run perpendicular to the joists (so boards span the joist spacing). For decks where the joists run length-wise, boards run width-wise (and vice versa). Diagonal boards (45° angled) require more boards because each board is longer and you waste more cutting; budget +10-15% extra for diagonal patterns.
Should I include nails / screws in the order?
Yes. Typical: 2 fasteners per board per joist. So a deck with 50 boards across 8 joists = 800 fasteners. Stainless steel deck screws cost more (~$30-40 per 1lb box of 100) but won't rust in pressure-treated wood (which corrodes regular galvanized fasteners). For composite, use the manufacturer-specified hidden-fastener system, not face screws.