Concrete Countertop Calculator

By HomeAdvisor

Updated January 20, 2021



Area (in ft.)
Depth (in in.)
*Includes standard 10% waste.

Concrete countertops are durable and versatile alternative surfaces with a high-end appearance that improves with age. Use a concrete countertop calculator to estimate the amount of materials needed to add this beautiful look to your home. Avoid miscalculations, save time, and ensure the success of your home improvement project.

On This Page:

  1. Calculating Concrete Countertops
    1. How to Calculate Countertop Volume
    2. How to Measure Odd Shapes
  2. Ready mix vs. Bagged Concrete
  3. Average Costs
  4. Tips
  5. FAQs

Calculating Concrete Countertops

Concrete is a functional and attractive countertop material for any modern home. Use a concrete countertops calculator to easily compute volume and convert it to cubic yards to figure out how much concrete you need for your home improvement project.

How to Calculate Countertop Volume

Calculating your concrete needs is a straightforward process that saves time and money in your home improvement project. Our easy to use calculator takes the guessing game out of the equation. Follows these steps to calculate your countertop square footage and find out exactly how much concrete you will need:

  1. Determine the thickness of your concrete slab
  2. Multiply the length and width to determine square footage. Then add 1-2 inches for any desired overhang.
  3. Convert the thickness from inches to feet
  4. Multiply the thickness in feet by the total square footage to determine cubic feet
  5. Divide by 27 to convert cubic feet to cubic yards

How to Measure Odd Shapes:

For triangular countertops, there is a simple formula to calculate square footage:

  1. Measure the base and height of the triangle
  2. Multiply the base times height
  3. Divide your result by two
  4. Divide by 27 to convert cubic feet to cubic yards

Dealing with irregular countertop shapes is easier than you may think. Divide the countertop into square and triangle sections and add the square footage of each section, then follow the same simple formula to find the amount of concrete.

Remodel your kitchen with a beautiful concrete countertop that gives your home a boost.

Ready Mix vs. Bagged Concrete

Ready mix concrete from brands like Quikrete® is best suited for larger jobs such as driveways, while bagged concrete is ideal for smaller jobs like countertops. Use the countertop mix calculator to estimate how many bags you will need, based on the desired square footage of your countertop.

Average Costs

The price of a 1.5-inch-thick concrete countertop ranges from $65 to $135 per square foot, depending on the level of customization that you want.

Price Range Characteristics

$65-$100/square foot Basic design
Standard knockouts
Non-custom color
$100-$135/square foot Integral or seeded aggregates
Custom shapes or edge details
Varied colors and finishing options
$135+/square foot Customized thickness, edges and shapes
Infinite color options
Specialized aggregate design

Find out how much your concrete countertop costs based on location, materials and scope.


  • Add 0.25 inches to the desired thickness of your slab to ensure well-compacted grade
  • Apply a surface sealer to make your concrete countertop water and stain resistant
  • Avoid placing hot pots or pans on sealed concrete surfaces to prevent damage
  • Use a color-matched filler to minimize the appearance of seams or grout lines

Hire a cabinet & countertop professional for guaranteed results in your home improvement project.


Are concrete countertops cheaper than granite?

Concrete countertops are about the same price as granite or engineered quartz. They are more expensive than tile, synthetic solids or laminate, but less expensive than marble.

How long do concrete countertops last?

Concrete countertops are exceptionally durable and strong. Though they are naturally scratch and chip resistant, you should have your concrete countertop resealed every 2 to 3 years for greatest durability.

Are concrete countertops easy to maintain?

Because it is a durable and solid surface, concrete countertops are easy to maintain and keep clean. With regular sealing, they resist scratches and heat.

Do concrete countertops crack?

Concrete countertops can develop hairline cracks over time. They are part of the character of each slab and tend result from the natural shrinkage of the concrete. Though the chance of cracks is lower with various reinforcement methods, they may still occur.

How thick do concrete countertops need to be?

Standard concrete countertop slabs are 1.5 to 2 inches in thickness.

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