The typical depth for a bathroom vanity is about 21 inches (roughly 53 cm), though depths can range from around 18 to 24 inches depending on the style and space. Here are quick guidelines to choose the right depth for your bathroom:

• Standard depths: Most vanities are around 20–21 inches deep. This strikes a balance between countertop space, storage, and walkway clearance. [web results indicate 20–21 inches as common]
• Smaller bathrooms or powder rooms: Consider shallower vanities in the 18–20 inch range to maximize floor space and ease of movement. [web results indicate 18–20 inch options exist]
• Larger bathrooms or need for extra storage: Deeper vanities around 22–24 inches can provide additional storage and countertop area, though they may feel bulkier in tight spaces. [web results note deeper options in some lines]
• Countertop overhang and sinks: If choosing a vanity with a countertop overhang or a larger sink, ensure the overall depth (including any overhang) still allows comfortable knee and leg room in front of the vanity. A typical overhang adds only a small amount, but plan around plumbing and door clearance. [general guidance from industry discussions]

Practical tips:

• Measure your bathroom layout: Ensure the vanity depth doesn’t obstruct door swings, shower entry, or other fixtures.
• Consider plumbing layout: Deeper vanities may require reworking plumbing or wall access behind the cabinet.
• Plan for clearance: Leave at least 24 inches of clear space in front of the vanity for comfortable access.

If you share your bathroom’s dimensions (room width, available depth, door placement) and whether you want more storage or more counter space, it’s possible to narrow down the best depth for your space.