What the calculator estimates
It turns your run lengths and depth into square footage, counts the exposed edge in linear feet, and applies material, edge, waste, and installation pricing to estimate cost.
Estimate countertops before you order
Enter the layout runs and depth, choose a material and edge profile, and the calculator works out square footage, edge length, waste, and cost. Pricing and fabrication vary by region and shop, so use this as a planning estimate and confirm with your supplier.
LayoutL-shape
MaterialQuartz
Waste factor10%
Layout
For L-shape and U-shape kitchens, enter each straight run. Depth is front-to-back.
Material, edge, and cost
Prices are editable defaults per square foot and per edge foot.
Good depth starting points
Standard kitchen counter depth is 25 to 26 inches. Bathroom vanities are about 22 inches, islands 36 to 42 inches deep, and bar ledges 12 to 18 inches.
Planning note
Countertop pricing changes with slab selection, edge complexity, cutouts, seams, and local labor. Confirm square footage, slab size, and final quote with your fabricator before ordering.
Formula used
- Convert each run length to feet and multiply by depth in feet for square footage.
- Net square feet is the sum of all run areas (or your entered total).
- Total with waste = net square feet x (1 + waste %).
- Edge linear feet is the exposed front edge of each run.
- Material cost = total with waste x price per square foot.
- Edge cost = edge linear feet x edge price per foot.
- Installation cost = total with waste x install price per square foot.
How do I measure countertop square footage?
Multiply each run length by its depth in feet, then add the runs together. An L-shape kitchen with a 10 foot run and a 6 foot run at 2 feet deep is 32 square feet. This calculator does that math for straight, L-shape, and U-shape layouts.
How much waste should I add for countertops?
A 10 percent waste factor covers cuts, seams, and corners for most layouts. Use 15 to 20 percent for diagonals, curves, waterfalls, or bookmatched slabs where offcuts are larger.
Which countertop material is cheapest?
Laminate is usually the lowest cost per square foot, followed by butcher block, then granite, quartz, and marble near the top. This calculator lets you set the price per square foot for any material your supplier quotes.
How is countertop edge priced?
Straight or eased edges are often included in the slab price. Upgraded edges like bevel, bullnose, and ogee add a per-linear-foot charge along the exposed front edge. This calculator counts that edge length and multiplies by your edge price.
Does this include sink and range cutouts?
No. Cutouts for sinks, cooktops, and faucets usually add flat fees per hole on top of the material and edge cost. Treat the cutout charges as a separate line when you compare fabricator quotes.
Is this a contractor quote?
No. It is a planning estimate. Slab selection, edge complexity, cutouts, seams, delivery, taxes, and labor vary by fabricator, region, and site conditions.