What is the standard thickness of marble countertops? 1 1/4 inches 66% 1 1/2 inches 33% Get Free Quotes Today! Question: What is the standard thickness of marble countertops? Top Answer (66% of 3 votes): 1 1/4 inches. Answer: 1 1/4 inches Explanation: Most marble is between 1 an 1/8th to 1an 1/4 Customized granite an repair Get Free Quotes Today! Find Local Pros Free Marble Countertop Installation Cost Estimates Related Questions How Much Do Marble Countertops Cost? Is Corian More Expensive than Granite? How Much to Install Tile Kitchen Countertops? Should Tile Countertops Be Sealed?Top answer: In some cases Is it possible to tile over laminate countertops?Top answer: No, never