Durable quartz countertops offer a wider variety of colors than other stone alternatives, such as granite. The price for any material will vary according to availability, demand, price of labor and other economic factors, so estimate the cost of your new quartz countertop when you are ready to install it. If you wait too long, the cost may change.
Measure the length and width of the counter space in inches. If you are replacing an existing countertop, use its dimensions. If there is no existing countertop, measure the horizontal area that the new countertop will fill. Multiply the length by the width to find the total surface area in square inches. For example, if you are filling a space that is 24 inches by 84 inches, multiply 24 by 84 to get 2,016 square inches.
Calculate any triangular surface area by multiplying the length of the triangle's base by its depth. The triangle's base is its longest side, and its depth is the distance from the base to its peak. After you have multiplied the base by the depth, divide that number by two to find the surface area in square inches. If you have a triangle that is 48 inches along the base and 24 inches from the base to the peak, multiply 48 by 24 to get 1,152, then divide by two for 576 square inches.
Add the areas of all your individual rectangular and triangular surfaces to determine the total surface area in square inches of your new quartz countertops. Divide this number by 144 to calculate your total square footage. Adding the numbers above gives you a total of 2,592. Dividing this number by 144 yields a total of 18 square feet.
Calculate your total estimated cost using a current price range. At the time of publication, the price of quartz ranged from $50 to $100 per square foot. Using the sample measurements above, you get an estimated total cost of $900 to $1,800.