Shim Calculator

What is a Shim Calculator?

A Shim Calculator is a tool used in carpentry and construction to calculate the thickness of shims needed for leveling or adjusting specific elements such as cabinets, doors, windows, and countertops. Shims are small, wedge-shaped pieces of material that are inserted between two objects to create a level surface or to fill gaps.

Shim Calculator

Shim Size:

How to Use a Shim Calculator

Using a Shim Calculator is a simple and straightforward process. Start by measuring the distance between the two objects that need to be leveled or adjusted. Enter these measurements into the Shim Calculator, along with the desired thickness of the shims. The calculator will then provide you with the precise thickness of shims needed to achieve a level surface.

Shim Calculator

Benefits of Using a Shim Calculator

There are several benefits to using a Shim Calculator in your carpentry or construction projects. Firstly, a Shim Calculator helps you ensure precision and accuracy in your measurements, reducing the risk of errors and wasted materials. Additionally, using a Shim Calculator can help save time and effort by providing you with the exact measurements needed for the job.

Types of Shims

There are various types of shims available for different applications, including wood shims, plastic shims, metal shims, and composite shims. Each type of shim has its own advantages and disadvantages, depending on the specific requirements of the project. It is essential to choose the right type of shim for the job to ensure the best results.

Common Uses of Shims

Shims are commonly used in construction and carpentry for a variety of purposes, such as:

  • Leveling countertops
  • Adjusting doors and windows
  • Installing cabinets
  • Aligning flooring
  • Stabilizing furniture
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Choosing the Right Shim Material

When selecting shims for your project, it is essential to consider the material of the shim. Wood shims are versatile and easy to work with, but they may compress over time. Plastic shims are durable and resistant to moisture, making them ideal for outdoor applications. Metal shims are strong and long-lasting, but they can be more challenging to work with than other materials.

Tips for Using Shims

Here are some tips for using shims effectively in your carpentry and construction projects:

  • Always measure the distance accurately before determining the thickness of shims needed.
  • Use multiple shims if necessary to create a stable and level surface.
  • Check the level frequently while adjusting shims to ensure accuracy.
  • Trim shims to fit properly if they are too long or wide for the application.


A Shim Calculator is a valuable tool for carpenters and construction workers looking to achieve precise and accurate leveling in their projects. By understanding how to use a Shim Calculator effectively and choosing the right type of shims for the job, you can ensure professional results in your carpentry and construction projects.