Free deck tile calculator: enter your area and tile size to instantly find out how many interlocking deck or patio tiles you need, how many packs to buy, and how much edge trim to finish the job. Add pack and trim prices for a full material or installed cost estimate. Works in metres/millimetres and feet/inches.
Type in what each one costs you - we multiply each by the quantity above. Leave any blank to skip it. This covers the tiles; base prep, fixings and labour are extra.
Packs to buy
14
Coverage area
120.0 sq ft
Spare tiles
8
Interlocking deck and patio tiles are laid over an existing surface and clipped edge to edge, so each tile covers exactly its own face - there is no grout joint or sand gap to add. The calculator divides your area by one tile, adds your wastage allowance, then rounds the total up to whole packs:
tile footprint = tile length × tile width (no joint - they interlock)
tiles = ceil( area ÷ tile footprint × wastage )
packs = ceil( tiles ÷ tiles per pack )
Covering an L-shape, or a deck plus a path? Add an area for each and the tiles pool into one order - an offcut from one edge can start the next run. Each area can be a rectangle, a circle (enter its diameter), or a right-angled triangle (enter the two legs), so curved and angled areas get a true area instead of a boxed-in guess. Tick edge trim to also size the snap-on edge and corner pieces for the exposed perimeter. All math runs in exact metric internally, so switching between feet and metres never changes the result.
Deck tiles are sold by the pack and lay over an existing surface, so the price comes down to the area and the tile you pick - which is why this calculator estimates cost from your numbers rather than a national average that drifts out of date. In the Cost estimate section, pick how you are pricing the job:
tiles = packs to buy × price per pack
edge trim = edge pieces × price each (when edge trim is on)
corners = corner pieces × price each (when edge trim is on)
installed = covered area × installed rate per sq ft/m²
The estimate covers only the tiles and any edge trim. Base prep, fixings and labour aren’t included - over grass or an uneven surface you also need to flatten, compact and level the ground, which varies far too much by job to price here. Leave any price blank to skip it; a partial list still totals. Cost figures are indicative - set each price to a real quote for your area.
This example follows the unit system you pick in the calculator above.
A 12 × 10 ft deck in 12 × 12 in interlocking tiles sold 10 to a pack, with 10% wastage:
Most deck tiles are square, but the size and how many come in a pack vary by brand. Read the figures off the pack and enter them above - this table is just a guide:
| Tile | Size | Coverage per tile | Common pack |
|---|---|---|---|
| Standard 12 in | 12 × 12 in (300 × 300 mm) | 1 sq ft (0.09 m²) | 6, 10 or 11 |
| IKEA Runnen | 330 × 330 mm (13 in) | 0.11 m² | 9 (1 m²) |
| Large composite | 12 × 24 in (300 × 600 mm) | 2 sq ft (0.18 m²) | 5 or 6 |
| Budget plastic | 12 × 12 in (300 × 300 mm) | 1 sq ft (0.09 m²) | 44 |
In the United States, interlocking deck and patio tiles are sold by the pack rather than by area - common ranges include IKEA Runnen, NewTechWood, Golden Select and a wall of unbranded composite and plastic packs at the big-box stores. Pack counts vary a lot (anywhere from 6 to 44 tiles), so read the count off the pack and enter it above; the calculator turns your tile total into the number of packs to buy.
Whatever the material - composite, acacia or other hardwood, plastic or rubber - the tile is the same square that clicks to its neighbours, so the math above is identical and only the tile size and pack count change. Lay them over a firm, free-draining surface: bare concrete or a balcony deck is ideal, while over grass or soil you want a flat, compacted, well-drained base first or the tiles will rock and trap water.
Divide the area you are covering by the size of one tile, then add a little for wastage. Interlocking tiles butt edge to edge with no gap, so a 12 × 12 in tile covers one square foot. A 12 × 10 ft deck is 120 sq ft, so about 132 tiles with 10% wastage. Enter your area and tile size above for the exact count and the number of packs.
It varies a lot by brand. IKEA Runnen comes 9 to a pack (about 11 sq ft), many composite and acacia tiles come 6, 10 or 11 per box, and budget plastic tiles can come in 44-packs. Always read the count off the pack and enter it in the calculator - it divides your total tile count by the pack size and rounds up to whole packs.
No. Unlike grouted floor tile or sand-set pavers, deck tiles have connector tabs on their edges that clip together, so each tile covers exactly its own face with no joint. That is why this calculator uses the bare tile size as the footprint - adding a gap would make you buy tiles you do not need. The small drainage gaps are inside each tile, not between them.
Allow about 5% for a simple square area laid in a straight grid, 10% if you have a few cut edges, and 15% for diagonal layouts, curved or angled edges, or a fiddly balcony with lots of obstacles. Most tiles can be cut with a fine-tooth saw, and the offcut from one edge often starts the next row. Keep the spare tiles - dye lots shift between production runs, so a later pack may not match.
Over concrete or a balcony they go straight down - the surface is already flat and drains, which is the ideal base. Over grass or soil you need to flatten and compact the ground first, ideally over a weed membrane and a thin levelling layer of sand or gravel, or the tiles will rock, sink unevenly and trap water. This calculator sizes the tiles either way; it does not size the base prep.
Split the area into rectangles, and add an area in the calculator for each one - the tiles pool into a single order, since an offcut from one section can start another. For a rounded corner switch that area to a circle (enter its diameter), and for an angled return use the right-angled triangle option (enter the two legs). That gives a true area instead of boxing a curve into a rectangle and over-ordering.
Only on exposed edges. Many systems sell snap-on bevelled edge strips and corner pieces so a free edge has a finished ramp instead of a raw tile lip - you do not need them where the tiles butt a wall or a step. Tick the edge-trim option above and enter your strip length, and the calculator works out the straight pieces and corner pieces for the outer perimeter; ignore the count for any edge that meets a wall.
It depends on the tile - budget plastic tiles can be a few dollars a square foot, while composite and hardwood (acacia, ipe) tiles cost several times that, and the area drives the rest. Because pricing varies so much by material and region, this calculator estimates cost from your own numbers rather than a baked-in average. In the cost section, enter your price per pack (and per edge and corner piece if you are trimming) and it multiplies each by the quantity it already worked out, or switch to an installed rate per square foot to price a fitter. The tiles lay over an existing surface, so base prep, fixings and labour are extra.
Usually, yes - interlocking tiles are designed to click together with no adhesive or special tools, so the labour is the main saving over a fitted job. Use the cost section above to compare: enter your pack price under "Buy the materials" for the DIY material total and a cost per square foot, then switch to "Installed price" and enter a fitter's rate to see the gap. Remember the DIY figure is materials only; over grass or an uneven surface, factor in the base prep too.
Turn a deck or patio area and tile size into a tile and pack count.
Read guide→Step-by-step guide to laying interlocking deck tiles, from base prep to edge trim.
Read guide→Whether deck tiles work over grass, dirt or an old deck, and how to prep each base.
Read guide→Composite, wood, plastic and rubber deck tiles compared, with sizes and pack counts.
Read guide→Deck boards, total board run and joists for a deck of any size.
Open calculator→Pavers, gravel sub-base, bedding sand, jointing sand and cost for a patio, path or driveway.
Open calculator→How many tiles, boxes, adhesive and grout to buy for a floor or wall, with wastage and cost built in.
Open calculator→Total area of any room or lot in sq ft, m², sq yd and acres.
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