Standard Bathroom Sink Hole Size Chart

Standard Bathroom Sink Hole Size Chart: A Comprehensive Guide

Installing a new bathroom sink can seem like a straightforward task, but one crucial aspect that often gets overlooked is the size of the sink hole in your countertop. Mismatched hole sizes can lead to leaks, instability, or visual unattractiveness. To ensure a perfect fit, refer to the standard bathroom sink hole size chart below before purchasing or cutting the countertop.

Single-Hole Sinks

Single-hole sinks are the most common type and come in various shapes and sizes. The standard hole size for single-hole sinks is typically 1-3/8 inches in diameter. This hole size accommodates the drainpipe and faucet base.

Three-Hole Sinks

Three-hole sinks feature separate holes for the faucet, hot water handle, and cold water handle. The standard hole sizes for three-hole sinks are as follows:

Faucet Hole: 1-3/8 inches
Hot Water Handle Hole: 1/2 inch
Cold Water Handle Hole: 1/2 inch

These holes are typically spaced 4 inches apart on center (from the center of one hole to the next) along the sink's edge.

Four-Hole Sinks

Four-hole sinks include an additional hole for a soap dispenser or other accessory. The standard hole sizes for four-hole sinks are:

Faucet Hole: 1-3/8 inches
Hot Water Handle Hole: 1/2 inch
Cold Water Handle Hole: 1/2 inch
Accessory Hole:
1-1/2 inches

The accessory hole is typically located between the faucet and handle holes, but its location may vary depending on the sink design.

Additional Considerations

Apart from the standard hole sizes outlined above, consider the following additional factors when choosing a bathroom sink:

Sink Shape and Design: The shape and design of the sink will determine the location and size of the holes.
Faucet Type: Different faucet types have specific hole requirements. Check the faucet's specifications to ensure it fits the sink holes.
Countertop Thickness: The thickness of the countertop can affect the depth of the sink and the length of the bolts or screws used to secure it.

By understanding the standard bathroom sink hole size chart and considering the additional factors mentioned above, you can confidently select and install a bathroom sink that fits perfectly, functions optimally, and complements your bathroom décor.