120 sq ft
Kitchen & Bath Calculator
Enter a room's dimensions, cabinet wall runs, and fixture clearances once and get cabinet linear footage, bathroom clearance checks, and tile count together.
Material ListFloor area Tiles Grout Thinset bags
A kitchen or bath remodel scope covers more ground than a generic room: cabinet layout and work triangle, fixture clearances, and wet-area tile. This page runs Room Layout once for floor area, then feeds that into Tile, alongside Cabinets and Bathroom fields entered separately since neither shares a dimension with a plain room rectangle. Each calculator below is the same one available on its own page — nothing here is a new formula.
Cabinet linear footage and work triangle
Cabinet linear footage sums your wall runs and subtracts any openings (doorways or pass-throughs) that interrupt a run, then compares that to your actual cabinet widths to find filler strip length — the gap between cabinet boxes and the wall run they sit in. The kitchen work triangle (sink, fridge, cooktop) checks the sum of the three straight-line distances between those points against the common 13-26 ft reference range; too short can feel cramped, too long adds unnecessary walking distance while cooking.
Cabinet wall runs don’t derive from the room’s length and width automatically — an L-shaped or galley kitchen layout has its own run lengths that a room rectangle alone doesn’t determine, so this page asks for them separately.
Room, cabinet, and fixture measurements
Enter room dimensions once for floor area and tile. Cabinet wall runs, appliance positions, and bathroom fixture clearances are entered separately since a kitchen layout or bathroom fixture plan isn't determined by room length and width alone.
Room Layout
Floor area from room length and width — the shared backbone for Tile below.
This room has 334.19 sq ft of wall and 120 sq ft of floor.
This room has
Room Layout result
Detail values
- Floor area
- 120 sq ft
Assumptions
Formula details
- Floor area: 0.5 x abs(sum(xi x yi+1 - xi+1 x yi))
Cabinets
Linear footage, filler strip length, and work triangle from cabinet wall runs and appliance positions.
This layout fits 5 cabinets across 15 ft of wall.
You'll need
Cabinets result
Detail values
- Cabinet linear feet
- 15
- Filler linear feet
- 2
- Work triangle
- 22.42 ft
- Work triangle within 13-21 ft
- Review
Assumptions
Bathroom
General-reference fixture clearance checks for toilet, shower, and lavatory placement.
Bathroom result
Detail values
- Toilet side clearance
- Pass
- Toilet front clearance
- Pass
- Shower size
- Pass
- Shower front clearance
- Pass
- Lavatory front clearance
- Pass
- Ceiling height
- Pass
Assumptions
Tile
Tile count, grout weight, and thinset bags over the room's full floor area.
You'll need 132 tiles and 7.69 lb of grout for 120 sq ft.
You'll need
Tile result
132 tiles
8 lb
6 bags
Detail values
- Tiles needed
- 132
- Grout fraction of module
- 2.05%
- Thinset weight
- 253.13 lb
Assumptions
- Grout type: Unsanded (100 lb/cu ft, editable)
- Trowel notch: 1/4" x 1/4" square notch (~0.1875in bed, editable)
- Thinset bag weight: 50 lb (editable)
- Waste: 10% (editable)
Formula details
- Grout coverage ratio: (tile L × tile W) / ((tile L + gap) × (tile W + gap))
Tile-to-module area ratio; the remainder of each module is grout.
- Thinset weight: area × trowel bed thickness × thinset density
Bathroom fixture planning
Bathroom fixture clearances check toilet side and front clearance, shower size and front clearance, and lavatory front clearance against common general-reference minimums. These are planning checks, not code citations for a specific jurisdiction — always verify local plumbing and building code before finalizing a layout.
Ceiling height feeds this check too, converted from the same feet value entered in Room dimensions to the inches Bathroom’s own clearance check expects.
Tile for wet areas
Tile runs over the room’s full floor area from Room Layout here, which fits a fully tiled kitchen or bathroom floor. Tile count factors your tile size and waste percent; grout weight and thinset bag count come from joint width, joint depth, and a density constant you can adjust for your grout product.
If tile only covers part of the room (a shower surround, a kitchen backsplash), switch Tile to manual entry and enter that smaller area directly.
FAQ
Why don't Cabinets and Bathroom follow the room length/width like Tile does?
A kitchen's cabinet wall runs and a bathroom's fixture clearances are their own measurements that a room rectangle doesn't determine on its own -- an L-shaped kitchen or an offset bathroom layout needs its own numbers, entered separately, the same way Framing & Structural asks for footing dimensions separately from the wall run.
Does Tile cover the whole room?
Yes, by default Tile runs over the full floor area from Room Layout. Switch Tile to "Manual entry" and enter a smaller area if only part of the room is tiled.
Are the bathroom clearance checks a local code citation?
No. They're general-reference minimums for planning purposes only. Always verify local plumbing and building code requirements before finalizing a bathroom layout.
Can I fine-tune just one calculator without changing the room dimensions?
Yes. Flip any section to "Manual entry" to edit its inputs directly without changing the room layout or the other calculators.
Disclaimer
Material estimate and general reference only. Verify local code, fixture manufacturer specifications, and field conditions before ordering or starting work.