How to Determine the Size of a Vanity

Quck answer

To measure a vanity, you will need a tape measure, pencil, and paper. Follow these steps:

1. Measure the width: Measure the distance between the two side walls where the vanity will be installed. This will give you the width measurement.

2. Measure the depth: Measure the distance from the back wall to the front edge of the vanity. This will give you the depth measurement.

3. Measure the height: Measure from the floor to the top of the countertop or basin. This will give you the height measurement.

4. Note down the measurements: Write down the width, depth, and height measurements for reference when purchasing or installing the vanity.

By following these steps, you can accurately measure a vanity to ensure a proper fit in your space.


Whether you’re planning a complete bathroom renovation or simply looking to replace your vanity, it is crucial to ensure that you have the correct size. This will not only guarantee that the vanity fits within the designated area, but also enable you to choose a vanity that suits your specific needs. Understanding how to measure a vanity will help you make the right decision.

Exterior Dimensions of the Vanity

You can use a tape measure to obtain the general dimensions of your bathroom vanity. Measure the widest part of the vanity that comes into contact with the floor, which is the base width. Then, measure across the countertop, which is the top width.

Next, to determine the depth dimensions of your vanity, take measurements of the base and top. To measure the base, you may need to remove a drawer and reach towards the back of the vanity. Finally, measure the height of the vanity.

Standard Vanity Sizes

Most bathroom vanities fall within a range of standard sizes. The smallest vanity options have widths between 24 and 30 inches. On the larger end of the spectrum, vanities with double sinks are at least 60 inches wide.

The standard depth of bathroom vanities is 21 inches, while most bathroom vanity designs have heights between 31 and 32 inches. However, if you require a more specific size, you can create a custom-fitted bathroom vanity of almost any size.

Single vs. Double

If you have sufficient space and share your bathroom with others, opting for a double vanity instead of a larger single one can be a good idea. Double vanities make sharing a bathroom much easier and provide more storage and counter space. Additionally, a double vanity could potentially increase the value of your home in the future.

However, double vanities can be more expensive to install and maintain. Some homeowners also find that two sinks are unnecessary and not the most efficient use of counter space.

Backsplash and Mirror

When fitting a bathroom vanity, there are other factors to consider in addition to the exterior dimensions. Along with the space occupied by the vanity, you must also allocate space for the backsplash, mirror, and bathroom cabinet.

The area behind your sink serves not only as a practical consideration, but also as an opportunity to add personal style to your vanity. Ensuring that there is wall space available for tiles, a mirror, or extra storage in the proposed vanity area is essential for a more practical and visually appealing vanity.

Several Additional Considerations

In order to determine the most functional size for your bathroom vanity, you should also consider the size of the sink. A larger sink will result in less counter space.

Another important factor to consider when measuring for your ideal bathroom vanity is the placement of plumbing lines. Vanity sinks need access to the water mains, which can significantly impact the overall design of your bathroom. Corner vanities, for example, can be a great use of space in a smaller bathroom, but installation can be challenging depending on the location of existing water and drain lines.

When considering the design of your bathroom vanity, it is crucial to take into account the arrangement of your entire bathroom. It is essential to ensure that there is sufficient room for walking and easy access to open drawers and cupboards. It might be beneficial to review the ADA guidelines for bathroom vanities to guarantee maximum accessibility.

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