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About this tool
Work out granite square feet, running feet and cost for a kitchen platform with backsplash, cutouts and edge profiles.
The Granite Countertop Calculator turns a kitchen platform's dimensions into granite square feet, running feet and a full cost, keeping the stone, the edge profile and the cutouts as separate line items the way a fabricator bills them. Area is the platform (length x depth) plus the backsplash (length x height) plus any front facia strip, grossed up by a wastage allowance; running feet are then derived at the standard 2 ft platform depth so a per-running-foot quote can be compared with a per-square-foot one. It suits homeowners checking a kitchen quote and fabricators pricing a job.
Open Granite Countertop Calculator on AltFTool — it loads instantly in your browser.
Enter Counter length (ft) and Counter depth (ft), then Backsplash length, Backsplash height (in), Front facia height (in) and a Wastage allowance (%).
Pick an edge Profile with its Exposed edge length (ft) and Edge charge (per running ft), then set the granite rate and the number of sink and hob cutouts.
Read Total cost alongside Area to order, Platform running feet and Equivalent running feet at 2 ft depth, then press Copy result.
Reports square feet and the equivalent running feet at the standard 2 ft depth.
Edge profile, sink and hob cutouts are shown separately, not buried in a rate.
Adds the cutting and matching allowance before you order the stone.
Multiply the counter length by its depth for the platform, add the backsplash length times its height, add any front facia strip, then add a wastage allowance of about 10 percent for cutting and breakage. A 12 ft platform at 2 ft deep with a 4 inch backsplash comes to 28 square feet net and about 30.8 square feet to order.
Running feet measure the length of the run only; square feet measure the actual surface. A running-foot rate assumes a standard platform depth — usually 24 inches in Indian kitchens — so dividing your total square feet by 2 gives the running feet an equivalent quote should show. Always check what depth a running-foot rate covers before comparing two quotes.
An eased or square edge is usually included in the base rate, a pencil round costs a little more, and shaped profiles like full bullnose, ogee or a mitred laminated edge cost progressively more per running foot because they take longer to grind and polish. Get the edge charge quoted separately per running foot rather than folded into the slab rate.
Most Indian kitchen platforms use granite around 16 to 20 mm thick, with 18 mm common; thicker 30 mm slabs are used where a chunkier look is wanted, or the effect is faked by bonding a strip under the front edge. Thickness affects the slab rate, so confirm it before comparing quotes.
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