Counter Top Calculator

Countertop Cost & Area Calculator

Total Surface Area: 0.00 Sq. Ft.

Material Subtotal: $0.00

Installation Subtotal: $0.00

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Estimated Total: $0.00

function calculateCountertop() { var length = parseFloat(document.getElementById('ct_length').value); var depth = parseFloat(document.getElementById('ct_depth').value); var matPrice = parseFloat(document.getElementById('ct_mat_price').value); var instPrice = parseFloat(document.getElementById('ct_inst_price').value); if (isNaN(length) || isNaN(depth) || length <= 0 || depth <= 0) { alert("Please enter valid positive numbers for length and depth."); return; } // Convert square inches to square feet var areaSqIn = length * depth; var areaSqFt = areaSqIn / 144; // Calculate costs var materialTotal = areaSqFt * (isNaN(matPrice) ? 0 : matPrice); var installTotal = areaSqFt * (isNaN(instPrice) ? 0 : instPrice); var grandTotal = materialTotal + installTotal; // Display results document.getElementById('res_area').innerText = areaSqFt.toFixed(2) + " Sq. Ft."; document.getElementById('res_material').innerText = "$" + materialTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('res_install').innerText = "$" + installTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('res_total').innerText = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); }

How to Calculate Countertop Square Footage

Planning a kitchen or bathroom renovation requires precise measurements to ensure you order the right amount of material. Whether you are choosing granite, quartz, or laminate, the calculation is based on the total surface area in square feet.

The Measurement Process

To find your countertop area, follow these steps:

1. Measure the Length: Use a tape measure to find the total length of the base cabinets in inches.
2. Measure the Depth: Standard kitchen base cabinets are usually 24 inches deep, but countertops typically have a 1.5-inch overhang, making the standard depth 25.5 inches.
3. The Formula: Multiply the Length by the Depth (in inches) to get square inches, then divide by 144 to convert to square feet.

Example Calculation:
A countertop section that is 120 inches long and 25.5 inches deep:
120 x 25.5 = 3,060 Square Inches
3,060 / 144 = 21.25 Square Feet

Average Countertop Material Costs

Material choices significantly impact your final budget. Here are typical price ranges per square foot (installed):

Material	Avg. Price/Sq Ft
Laminate	$20 – $50
Granite	$40 – $100
Quartz	$50 – $120
Marble	$75 – $200

Additional Factors to Consider

• Backsplashes: If you are using the same material for the backsplash, remember to calculate its area (Height x Length / 144) and add it to the total.
• Sink Cutouts: Fabricators often charge a flat fee for sink cutouts and edge polishing.
• Edge Profiles: Decorative edges like "Bullnose" or "Ogee" may cost more per linear foot than a standard square or eased edge.
• Seams: Large L-shaped or U-shaped kitchens will require seams. Most professional installers try to minimize these while maximizing slab yield.