Kitchen Countertop Area Planner
Measure the counter space you can see. If the two lengths both include the same corner, deduct that shared rectangle once—not twice. Add a separate island only when it is not included in either run.
How to avoid measuring an L-shaped corner twice
Imagine one 96-by-25.5-inch counter and a second 60-by-25.5-inch run. If both measurements contain the same 25.5-inch-square corner, their areas add to more than the countertop actually occupies. Deducting that one shared square leaves about 23.11 square feet for the L shape. A separate 48-by-36-inch island adds 12 square feet, for a total footprint of about 35.11 square feet.
If you measured the second run from the inside corner so the shared portion was already excluded, set both shared-corner fields to zero. Never deduct a corner merely because your kitchen has an L shape: deduct only a rectangle that was counted in both input measurements.
Before you ask for an installed-price quote
This figure is a floor-plan footprint, not a slab cutting layout or final fabricator template. It does not subtract a sink cutout from the amount of slab you must purchase. Material yield, veins, seam placement, edge profiles, overhangs, site tolerances, labor and removal can all change the installed cost. Use the countertop measuring and quote checklist to prepare the questions to ask; then record itemized prices in the Kitchen Remodel Cost Calculator or Project Budget Workspace. Have a fabricator verify final dimensions before ordering.