How do I calculate how much tile I need for a countertop?

Measure the countertop length × depth in inches, divide by 144 to get square feet, then add the backsplash and the front edge if you're tiling them. Multiply the total by the number of tiles per square foot for your tile size and add 10% waste. Our tile calculator does this automatically when you enter the dimensions.

What size tile is best for a countertop?

Small to medium tiles (from 2-inch mosaics up to 6x6 or 12x12) are easiest to fit around sinks and edges, while large-format and slab-look porcelain give fewer grout lines and a more modern surface. Choose a hard, low-absorption tile — porcelain or granite — rated for a work surface, and use an epoxy or sealed grout for stain resistance.

Do I include the backsplash in the countertop tile total?

Yes, if you're tiling the backsplash in the same tile, add its area to the countertop total before applying waste. Measure the backsplash length × height separately, convert to square feet, and sum it with the counter surface. If the backsplash uses a different accent tile, calculate it on its own.

How much extra tile should I buy for a countertop?

Add at least 10% waste for a straight layout, and 15% if you're using a diagonal or herringbone pattern or cutting around an undermount sink and a cooktop. Countertops have many edges and cutouts, so err on the higher side and keep a few spares for repairs.

How do I tile around a sink or cooktop?

Measure the full countertop as a solid rectangle first, then subtract the sink or cooktop opening only if it's large (a big farmhouse sink). For a standard drop-in sink, leave the opening in your total — the offcuts rarely reuse cleanly, and the extra tile covers edge cuts and breakage.

How to Calculate Tile for a Countertop (Counter, Edge & Backsplash)

Quick answer: Measure the counter length × depth, add the front edge and any backsplash, convert to square feet, then multiply by the tiles per square foot for your size and add 10–15% waste. A 10 ft × 25 in kitchen counter is about 17 sq ft of surface before the edge and backsplash.

A tiled countertop is really three surfaces in one — the flat top, the front edge, and usually a backsplash — so the key is to measure each part and add them together. This guide shows you how, with a worked kitchen example. To get a tile and box count instantly, enter each surface in the tile calculatorusing the “Add Another Area” option.

Measure the three surfaces

The counter top: length × depth. A standard US kitchen counter is about 25 in deep (24 in cabinet + overhang); a bathroom vanity is often 22 in deep.
The front edge:counter length × edge height. A tiled edge is usually 1.5–2 in tall. Don’t skip it — the edge tile and trim pieces add up.
The backsplash: length × height. A short splash is 4 in; a full splash runs to the cabinets. Measure it the same way as a kitchen backsplash.

Convert inches to square feet

Counters are usually measured in inches, so convert each surface to square feet by dividing the area in square inches by 144:

Formula: (length in inches × width in inches) ÷ 144 = square feet

See how to calculate tile square footage for more on unit conversion and odd shapes.

Worked example: a kitchen counter + backsplash

The project: a 120 in (10 ft) run of counter, 25 in deep, with a 2 in tiled front edge and a 120 in × 18 in backsplash, in 6x6 in tile (4 tiles per sq ft).

Counter top: 120 × 25 ÷ 144 = 20.8 sq ft
Front edge: 120 × 2 ÷ 144 = 1.7 sq ft
Backsplash: 120 × 18 ÷ 144 = 15 sq ft
Total: 20.8 + 1.7 + 15 = 37.5 sq ft
Tiles: 37.5 × 4 = 150, +10% waste = 165 tiles

Pick the right tile and grout

A countertop is a hard-working surface, so the material matters more than on a wall:

Use a dense, low-absorption tile — porcelain or granite — rated for a work surface. See porcelain vs. ceramic tile for why absorption matters.
Choose a stain-resistant grout. Epoxy or a quality sealed grout resists food and water far better than standard grout. Estimate how much with our grout guide.
Mind the grout lines. Thinner joints mean less to clean — see the grout line size guide.

How much extra to buy

Countertops have sinks, cooktops, corners, and edge trim, so cuts and breakage are higher than on a plain floor. Add 10% for a straight layout and 15% for diagonal or patterned tile or a counter with a lot of cutouts. More detail in how much extra tile to buy.

Frequently asked questions

How do I calculate how much tile I need for a countertop?: Measure the countertop length × depth in inches, divide by 144 to get square feet, then add the backsplash and the front edge if you're tiling them. Multiply the total by the number of tiles per square foot for your tile size and add 10% waste. Our tile calculator does this automatically when you enter the dimensions.
What size tile is best for a countertop?: Small to medium tiles (from 2-inch mosaics up to 6x6 or 12x12) are easiest to fit around sinks and edges, while large-format and slab-look porcelain give fewer grout lines and a more modern surface. Choose a hard, low-absorption tile — porcelain or granite — rated for a work surface, and use an epoxy or sealed grout for stain resistance.
Do I include the backsplash in the countertop tile total?: Yes, if you're tiling the backsplash in the same tile, add its area to the countertop total before applying waste. Measure the backsplash length × height separately, convert to square feet, and sum it with the counter surface. If the backsplash uses a different accent tile, calculate it on its own.
How much extra tile should I buy for a countertop?: Add at least 10% waste for a straight layout, and 15% if you're using a diagonal or herringbone pattern or cutting around an undermount sink and a cooktop. Countertops have many edges and cutouts, so err on the higher side and keep a few spares for repairs.
How do I tile around a sink or cooktop?: Measure the full countertop as a solid rectangle first, then subtract the sink or cooktop opening only if it's large (a big farmhouse sink). For a standard drop-in sink, leave the opening in your total — the offcuts rarely reuse cleanly, and the extra tile covers edge cuts and breakage.

Add your counter, edge, and backsplash as separate areas in the free tile calculator to get an exact tile and box count with waste already included.