To measure an oval undermount bathroom sink, you simply measure from the widest point on length and width.
Measuring your sink correctly is essential whether you're replacing an old one or planning a new installation. For an oval undermount sink, the key is to capture the dimensions of the opening that sits beneath the countertop.
Why Measure Your Sink?
Knowing the precise dimensions of your oval undermount sink is crucial for:
- Replacement: Ensuring a new sink fits the existing countertop cutout.
- Countertop Fabrication: Providing accurate measurements to a fabricator if you're installing a new countertop with an existing sink.
- Ordering Parts: Verifying compatibility for drains, faucets, and other accessories.
How to Measure an Oval Undermount Bathroom Sink
Based on standard practices and the provided reference, the core method for measuring an oval undermount sink opening involves finding the maximum width and length.
- Locate the Opening: Access the sink from underneath the countertop. This is where you'll measure the actual cutout dimensions.
- Measure the Length (Longest Dimension): Using a tape measure, find the longest distance across the oval opening. Position the tape measure to span the sink from edge to edge along its longest axis, identifying the widest point on length.
- Measure the Width (Shortest Dimension): Now, find the shortest distance across the oval opening, perpendicular to the length measurement. Position the tape measure across the sink's narrowest axis, identifying the widest point on width (meaning the widest point along that dimension).
- Record Measurements: Note down these two primary measurements (Length and Width). It's often wise to measure in inches and fractions or millimeters for accuracy.
These two measurements – the maximum length and maximum width at their widest points – provide the essential dimensions for the sink opening.
Essential Sink Measurements
| Measurement Type | Description | How to Measure (Based on Reference) |
|---|---|---|
| Length | The longest distance across the sink opening | Measure from the widest point on length |
| Width | The shortest distance across the sink opening | Measure from the widest point on width |
Important Considerations
- Measure the Opening: For an undermount sink, you typically measure the opening or the template area that goes under the counter, not the outer rim of the sink itself, as the rim is hidden by the countertop.
- Use a Template: If you have the sink's original template, verify its dimensions against your measurements. Manufacturers often provide templates for fabricators.
- Include Lip/Flange (If Applicable): Sometimes, you might need the outer dimensions of the sink itself, including any lip or flange that sits against the underside of the counter, especially if you're trying to assess clearance or overall sink size, but the critical fit dimension for the hole is the inner opening.
- Measure Multiple Times: Measure the length and width several times to ensure accuracy and check for consistency.
By focusing on the widest points of the length and width of the undermount opening, you get the critical dimensions needed for compatibility and installation.
