Usable length · Usable width · Tile length
Mistake: Changing units and assuming the entered numbers were converted.
Fix: Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Calculators · Free
Centered tile-grid worksheet
Plan rows, equal border cuts and whole boxes for a rectangular floor.
01Enter your values
Runs in your browserRuns offline in your browser. Once the page and required files have loaded, processing needs no internet.
02Centered tile-grid worksheet
Runs in your browser
How it works
Plan rows, equal border cuts and whole boxes for a rectangular floor.
n=ceil((L+g)/(t+g)); end=(L−(n−2)t−(n−1)g)/2 (n≥2); boxes=ceil(rows×columns/pack)
Runs in your browser
Discovery source
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Plan rows, equal border cuts and whole boxes for a rectangular floor.
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
How to use it
- Enter your values
Usable length · Usable width · Tile length · Tile width · Joint width · Tiles per box
- Calculate / generate
Plan rows, equal border cuts and whole boxes for a rectangular floor.
- Result
Tiles before reuse: 70 Boxes: 7 Spare tiles: 0
Calculation method
- Round each joint-aware grid count upward.
- Keep full interior tiles and split remaining width equally between opposite borders.
- Count each cut position as a new tile, then round to boxes.
n=ceil((L+g)/(t+g)); end=(L−(n−2)t−(n−1)g)/2 (n≥2); boxes=ceil(rows×columns/pack)
Centered tile-grid worksheet
- Usable length
- 3000 mm
- Usable width
- 2000 mm
- Tile length
- 300 mm
- Tile width
- 300 mm
- Joint width
- 3 mm
- Tiles per box
- 10
Result
Tiles before reuse: 70 Boxes: 7 Spare tiles: 0
Frequently asked questions
Limits and key assumptions
One straight rectangular grid with no rotation, obstructions or offcut reuse. Enter usable dimensions after perimeter gaps. No grout weight, adhesive, breakage allowance or structural approval.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Measurement system
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
- Usable length
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
- Usable width
Keep full interior tiles and split remaining width equally between opposite borders.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
- Tile length
Keep full interior tiles and split remaining width equally between opposite borders.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
- Tile width
Keep full interior tiles and split remaining width equally between opposite borders.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0.001 · Maximum: 1000000 mm
- Joint width
Round each joint-aware grid count upward.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0 · Maximum: 1000 mm
- Tiles per box
Keep full interior tiles and split remaining width equally between opposite borders.
Enter a whole number; fractional counts are not valid.
Minimum: 1 · Maximum: 1000000
Result
- Result
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Tiles before reuse
Keep full interior tiles and split remaining width equally between opposite borders.
Calculated from your entries using the method below.
- Boxes
Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Spare tiles
Keep full interior tiles and split remaining width equally between opposite borders.
Calculated from your entries using the method below.
- Value
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Unit
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Columns
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Rows
Round each joint-aware grid count upward. Keep full interior tiles and split remaining width equally between opposite borders. Count each cut position as a new tile, then round to boxes.
Calculated from your entries using the method below.
- Equal end cuts along length
Keep full interior tiles and split remaining width equally between opposite borders.
Calculated from your entries using the method below.
- Equal end cuts along width
Keep full interior tiles and split remaining width equally between opposite borders.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Limits and key assumptions
Mistake: Treating a result as valid outside the described scope.
Fix: One straight rectangular grid with no rotation, obstructions or offcut reuse. Enter usable dimensions after perimeter gaps. No grout weight, adhesive, breakage allowance or structural approval.
Limits and key assumptions
- One straight rectangular grid with no rotation, obstructions or offcut reuse. Enter usable dimensions after perimeter gaps. No grout weight, adhesive, breakage allowance or structural approval.
- Displayed results may be rounded; rounding does not add measurement precision.