The kitchen
Start from a common job, then replace every figure with your template. Layout waste fills the slab count; picking a layout never overwrites a waste percent you already typed.
Your shop rates
A $38/h fabricator loaded at 30% is $49.40. Quoting the raw wage on a published per-square-foot special is how a waterfall island that looked fine turns into a two-slab loss after the first polished hole.
Hand the customer a proposal
The price above is for you. This is the page you print or save as a PDF and give to the customer — your details, their details, the scope, the deposit split, and a line for them to sign. Your business details are saved on this device so you only type them once; the customer’s details are never saved.
Everything on the printed page is text you typed or a number this calculator worked out. It contains no warranty, lien, or cancellation wording — those depend on your jurisdiction and your contract, and this tool is not the place to invent them.
Your bid
- Finished / required stone
- Slabs in the takeoff
- Waterfall extra stone
- Crew hours
- Loaded labor
- Slabs + supplies
- Travel + template trip
- Overhead
- Total cost
- Profit at this price
- Price per finished sq ft
- Effective hourly rate
- Walk-away price
Where the hours go
Where the cost goes
Transparent arithmetic from your own inputs. Starting hours, waste, and slab sizes are common ballpark figures, not an industry standard, a color match, or a stone specification — replace them with your own template.
Common questions
Why does a 28 sq ft waterfall island cost more per foot than a 55 sq ft L-kitchen?
Because waterfall ends consume whole extra slab, not extra finished square footage. Each waterfall end wraps the countertop down the side of the island in one continuous piece, so it is billed and fabricated by the slab, not by the sq ft rate. A small island with two waterfalls can use more stone — and more shop hours — than a much larger straight run with none. That is the “slab trap” preset: 28 sq ft, no sink, no cooktop, still one of the pricier jobs on the list.
Why does layout change the price for the same finished square footage?
Because waste percent scales with how many cuts and returns the layout needs, not with the visible countertop area. A straight galley run starts at 12% waste. An L-shape starts at 20%. A U-shape starts at 28%, and a run with an island starts at 24%. Two kitchens with identical finished square footage can need very different amounts of slab once the layout’s starting waste percent is applied.
What is the real cost difference between an eased edge and a mitered edge?
About 5.6× the labor per linear foot. An eased or pencil edge starts at 0.08 hours per linear foot. A bevel starts at 0.12. An ogee or bullnose starts at 0.22. A mitered, laminated edge — the thick-look edge on an island — starts at 0.45 hours per linear foot, because it is built up from a second strip of stone glued and finished to look solid. The edge profile you pick refills the starting hours automatically so the swing shows up before you touch a rate.
Why does an undermount sink cost more than a drop-in for the same cutout?
A drop-in sink sits on top of the counter, so the cutout edge is hidden under the sink’s own rim — roughly 0.6 hours. An undermount sink hangs below the stone, so the cut edge is fully visible and has to be polished, which starts at 2 hours. A farmhouse or apron-front sink needs the counter itself notched to fit around the front of the sink and starts at 3 hours. Same hole in the counter, very different finishing work.
Is my data uploaded anywhere?
No account and no network requests — the calculator runs entirely in your browser. A share link encodes only the inputs you choose into the address bar and is never sent to us, and the optional usage counter records only which features were used and the day, never your dimensions, wages, or prices. Only your business details for the printed proposal are kept in this browser’s local storage so you do not retype them, and the customer’s details are never saved.
What’s the difference between the bid price and the walk-away price?
The bid price already includes your target margin on top of labor, materials, and overhead. The walk-away price is the total cost underneath it — template and fabrication hours, slabs, sink and cooktop cutouts, edges, backsplash, and waterfalls — the point below which the job stops being profitable at all. Typing a price you are considering shows you the margin or the loss before you send it.