Calculate how much countertop material you need in square feet. Compare costs for granite, quartz, marble, laminate, butcher block, concrete, and soapstone.
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Quick reference for standard kitchen counter configurations.
| Layout | Total Length | Square Feet |
|---|---|---|
| Straight run | 8 ft | 17.0 |
| Straight run | 10 ft | 21.3 |
| L-shaped | 8 + 6 ft | 29.8 |
| L-shaped | 10 + 8 ft | 38.3 |
| U-shaped | 8 + 10 + 8 ft | 55.3 |
L-shaped kitchen counter with 8-foot and 6-foot sections at standard 25.5-inch depth? You need 29.8 square feet of countertop material. In quartz at $50–$150 per square foot, budget $1,488–$4,463 installed.
Measure each straight section of counter separately — length along the wall and depth from wall to front edge. Standard counter depth is 25.5 inches (25-inch cabinet + 1.5-inch front overhang). For L-shaped or U-shaped kitchens, measure each leg as a separate section and add them together.
Granite countertops cost $50–$200 per square foot installed, depending on the grade and color. Level 1 (builder grade) runs $50–$80/sqft, while exotic Level 5 granites can exceed $200/sqft. A typical kitchen with 30 square feet of counter costs $1,500–$6,000 for granite.
Quartz and granite are similarly priced at $50–$150 per square foot installed. Mid-range quartz is often slightly more expensive than mid-range granite, but quartz requires zero sealing and less maintenance. Both are premium countertop options.
Plan for 10–20% waste with natural stone slabs (granite, marble, soapstone) because they're cut from large slabs and irregular shapes create offcuts. Quartz and laminate have similar waste. Butcher block has less waste (5–10%) since boards can be joined.
Standard kitchen countertop depth is 25–25.5 inches, which includes the cabinet depth (24 inches) plus a 1–1.5 inch front overhang. Island countertops are often 27–28 inches deep to accommodate seating overhang on one side.
A matching stone backsplash adds $10–$30 per linear foot for the material, plus fabrication. For a 10-foot counter section, that's roughly 2.8 additional square feet of material. Many homeowners opt for a full tile backsplash instead, which is typically $15–$40 per square foot installed.
Planning a tile backsplash? Try our tile calculator for backsplash square footage and tile count.