5x8 Bathroom Tile Calculator
40 sq ft — standard small bathroom.
Open Tool →How Many Tiles Do I Need for an 8x10 Room?
8x10 works out to 80 sq ft — a compact room where plumbing fixtures or appliance footprints can change the cut plan fast.
Instant answer: An 8x10 room covers 80 sq ft. With 15% waste, order about 92 sq ft of tile or roughly 92 12x12 tiles, 42 18x18 tiles, or 46 12x24 tiles.
What are you tiling?
Room size
This calculator is pre-filled for a 8 ft × 10 ft (80 sq ft) room. Change the numbers below if your room is a different size.
Tile size (inches)
Common sizes for this room (click to fill):
15%
15% default (double vanity, tub, appliance hookups) · 20% around a walk-in shower · 10% only for a completely open floor
Tiles to Buy (incl. wastage)
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Tiles Without Wastage
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Area (sq ft)
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Area (m²)
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Planning Tile for Medium Bathrooms
An 8×10 foot floor (80 sq ft) is large enough to feel like a proper master bathroom or utility room — and large enough to make layout decisions that matter. Unlike a cramped 5×8, you have room for a double vanity, a separate tub and shower, or even a washer/dryer pair. But with more space comes more complexity: floor drains, appliance cutouts, and heating systems all need to be planned before the first tile goes down.
Master Bathroom Layouts
In a master bath, the tile layout sets the visual hierarchy of the entire room. Consider these layout principles before you cut a single tile:
- Double Vanity Axis: If your double vanity sits along the 8-foot wall, center your tile grid on that wall rather than the room's geometric center. This makes the tile pattern look intentional rather than accidental.
- Shower Entry Alignment: Where possible, align a full tile with the shower entry threshold. Entering a shower and stepping onto a cut tile feels unfinished — it signals poor planning to any future buyer.
- Floor Drain Placement: If your master bath has a floor drain (common in custom builds and modern wet-room designs), the drain must be at the low point of a sloped floor. Plan the slope direction before laying any tile — slope changes require a mortar bed, not just thin-set.
Laundry Room Considerations
An 8×10 laundry or utility room has different demands than a bathroom. Washing machines vibrate, detergents spill, and heavy appliances press hard on any weak spots in the floor:
- Anti-vibration substrate: Always install cement board (Hardiebacker or USG Durock) or an uncoupling membrane under laundry room tile. Washing machine vibration transmitted directly to plywood will crack grout joints within months.
- Stain-resistant grout: Use epoxy grout or a premixed stain-resistant grout in laundry rooms. Bleach, fabric softener, and detergent will permanently stain standard grey or white sanded grout.
- Appliance feet: Ensure tiles directly under appliance feet are fully supported — no hollow spots. Back-butter every tile in the appliance zone and check with a grout float after setting.
Tile Size vs. Room Appearance
| Tile Size (in) | Est. Quantity (15% Waste) | Visual Effect in 8×10 | Best For |
|---|---|---|---|
| 18×18 | 42 pieces | Spacious, open, fewer grout lines | Master bathroom floors |
| 12×24 | 46 pieces | Elongates the shorter dimension | Master bath or utility room |
| 12×12 | 92 pieces | Traditional, balanced, easy to replace | Laundry rooms, high-traffic utility |
| 8×8 | 207 pieces | Classic proportions, strong grout grid | Ensuite baths, vintage aesthetic |
Heated Floor Compatibility
| Tile Type | Radiant Heat Compatible? | Notes |
|---|---|---|
| Porcelain | ✅ Yes — Ideal | Conducts and holds heat efficiently; low expansion |
| Ceramic | ✅ Yes | Good conductivity; avoid joints wider than 1/4" |
| Natural Stone (Marble) | ⚠️ Use Caution | Heats unevenly; use self-leveling mortar to prevent cracking |
| Vinyl / LVT | ❌ No | Not compatible with radiant heat systems |
| Wood-look Porcelain Plank | ✅ Yes | Best of both worlds — warmth + wood aesthetic |
Floor Heating: What to Know Before You Tile
Electric radiant heating mats are popular in 8×10 master bathrooms because the material cost is manageable (roughly $150–$300 for 80 sq ft) and the installation is straightforward. Key rules:
- Install the mat on top of cement board, not directly on the subfloor.
- Embed the heating mat in a thin layer of modified thin-set — do not run the mat under the mat.
- Place the thermostat sensor wire between tiles in the grout line — never underneath a tile where it cannot be replaced.
- Never overlap heating cable — gaps in coverage are fine; overlaps cause hot spots and mat failure.
8×10 Bathroom & Laundry Room FAQs
Yes. Electric radiant heating mats are an excellent choice for an 8×10 bathroom. Install the mat directly over your cement board, embed it in thin-set, and tile over it. Ensure the mat does not overlap itself and that the thermostat sensor wire is placed between tiles in a grout joint — not under a tile where it cannot be accessed or replaced.
Porcelain is denser, less porous, and harder than ceramic, making it better suited for master bathrooms with daily moisture exposure. Porcelain has a water absorption rate of less than 0.5%, compared to up to 3% for standard ceramic. For a floor that will be wet every day from showers and steam, full-body porcelain is the professional recommendation.
Yes. Laundry rooms benefit from epoxy grout or a stain-resistant polymer-modified sanded grout. Detergent spills, bleach runoff, and high foot traffic will permanently stain standard cement grout. A darker colored or epoxy grout resists staining and is far easier to clean over years of heavy use.