Last checked
May 12, 2026
We checked the page logic, support notes, and related links on this page.
Tile quantity tool
Tile Calculator
Estimate tile count, boxes, waste, and rough material cost for wall and floor tiling.
Area + buying unitsWaste-aware resultBuying checks
How to use it
Planning before buying
Use this calculator for a planning check, then confirm the final order or quote against live product data and site conditions.
Why trust it
See how the site is maintained
Read the calculator methodology and editorial policy for the standards behind these pages.
Planning summary
Quick answer
Best for turning a measured area into a safer buying quantity before you compare pack sizes or place an order.
Planning summary
Watch most
Common misses include ignoring cut-heavy layouts, forgetting breakage, and comparing prices without checking pieces per box.
Planning summary
Best next move
Measure carefully, sense-check the result against supplier pack sizes, and add a practical allowance for cuts, breakage, or site variation.
Recently used calculators
Pick up from the calculators you used recently on this device.
Quote-ready brief
Use these actions to turn the live calculator result into a cleaner request for builders, suppliers, or merchants.
Run the calculator, then use these actions to prepare the estimate for a real quote request.
Need help deciding what to ask for? Read the quote checklist or contact the team at hello@buildcostlab.com.
Practical checks before you buy
These notes are where BuildCostLab goes beyond a generic calculator result by surfacing the assumptions, buying traps, and next decisions that usually move the real order.
What this estimate includes
The measured coverage area, stated product yield or pack coverage, waste allowance, whole-unit rounding, and a rough material spend when a price is entered.
What it may not include
Live product instructions, substrate preparation, delivery charges, labour, and installation details that depend on the specific product system.
Key assumptions
Assumes standard rectangular tile layouts and a buyer who wants both tile counts and whole-box buying guidance.
Worked example
Example: 9m2 of tiled area with 12 percent waste becomes 10.08m2 of planned coverage. That is the safer figure to use when you compare tile boxes, adhesive bags, and grout allowances.
How this estimate is worked out
We multiply length by width, add the waste allowance, then convert the adjusted area into whole buying units using the stated coverage per pack, roll, sheet, bag, or tin.
What assumptions sit underneath it
Assumes standard rectangular tile layouts and a buyer who wants both tile counts and whole-box buying guidance.
How rounding is handled
Because most products are bought in full packs, rolls, sheets, or tins, the final answer rounds up to a real ordering total rather than stopping at the theoretical minimum.
What changes the result most
Real product yield, waste, awkward cuts, surface condition, and whole-pack rounding usually move the final order more than people expect.
When this estimate breaks
Remeasure when the product coverage is uncertain, the layout is heavily cut up, or the supplier sells in pack sizes that do not match the default assumptions.
Practical buying checks
Check batch matching, spare stock, delivery timing, and whether running short would be more expensive than buying one extra unit.
Quote-ready checklist
Use these prompts when you want to turn the estimate into a clearer builder, installer, or merchant request.
- State the measured area, product choice, waste allowance, and how the material is sold.
- Ask the supplier or installer to confirm real coverage and whether substrate condition changes the quantity.
- Check whether one spare unit is sensible for matching, touch-ups, awkward cuts, or batch consistency.
Explore this project hub
Open the full Tile Estimating project hub to move from quick estimate to deeper guidance.
Related calculators in the same project hub
Use these linked tools when the estimate crosses into another calculator in the Tile Estimating cluster rather than stopping at one isolated material number.
Tile Adhesive Calculator
Estimate tile adhesive bags and rough cost from wall or floor tile area.
Tile Backer Board Calculator
Estimate tile backer board sheets or packs and rough cost for wall and floor prep.
Tile Grout Calculator
Estimate tile grout quantities and rough cost from tiled area and product coverage.
Quick answers
These answers are designed to resolve the last practical buying questions people usually have after running the calculator.
How many tiles do I need?
Work out the area, divide by the tile face area, add waste, and then round up to the box size.
Why does tile waste matter so much?
Because layout cuts, breakages, and pattern matching can push the real buying number well above the neat mathematical answer.
Use this estimate in a quote request
Copy the estimate, add your own notes, and send the same scope to each builder or supplier so the quotes are easier to compare.
- Confirm what the quote should include: materials only, labour only, or both.
- State access, finish level, timing, and any unknowns clearly.
- Ask each supplier or installer to price the same scope and exclusions.
You can also open the wider Tile Estimating project hub if the quote depends on more than one material.