Doorway Measurement Guide: How to Size a Door Frame

Measuring a doorway for a new door might seem like a simple task, but it's crucial to get the dimensions right to ensure a perfect fit. A door that's too big or too small can cause functionality issues and negatively impact your home's aesthetics. Here's a step-by-step guide to help you measure your doorway accurately.

Before you start, gather your tools. You'll need a tape measure, a pencil, and a piece of paper to record your measurements. Also, consider the type of door you're installing. Different door styles have unique size requirements, so ensure you have the correct measurements for your chosen door.

Measuring the Doorway Width

The width of your doorway is a critical measurement. It determines the size of the door you can install. Here's how to measure it accurately:

Stand in the doorway and measure from one side of the door frame to the other. Ensure your measurement includes the entire width of the frame. This is the width of your doorway. Record this measurement.

Accounting for Door Swing

When measuring the width, consider the direction the door will swing. If the door swings into the room, you'll need to ensure there's enough space for it to open fully without obstruction. If it swings outwards, you'll need to consider the space required outside the doorway.

To account for the door swing, add the door's thickness to the width measurement. For example, if your doorway is 36 inches wide and your door is 1.75 inches thick, you'll need a door that's 37.75 inches wide to ensure a perfect fit.

Standard Door Widths

Doors come in standard widths. The most common are 32 inches, 36 inches, and 42 inches. If your doorway width doesn't match these standards, you might need to order a custom-sized door.

Before ordering a custom door, double-check your measurements. It's easier and cheaper to adjust your doorway width than to order a custom door. You can widen a doorway by removing a section of the frame or by installing a new frame that's wider.

Measuring the Doorway Height

The height of your doorway is another critical measurement. It determines the height of the door you can install. Here's how to measure it accurately:

Measure from the top of the threshold to the top of the door frame. Ensure your measurement is level and includes any trim or molding at the top of the frame. This is the height of your doorway. Record this measurement.

Standard Door Heights

Doors also come in standard heights. The most common are 80 inches (6 feet 8 inches) for interior doors and 82 inches (6 feet 10 inches) for exterior doors. If your doorway height doesn't match these standards, you might need to order a custom-sized door.

Before ordering a custom door, consider the room's ceiling height. A door that's too tall can make the room feel smaller. Conversely, a door that's too short can look out of place. Aim for a door height that's in proportion to the room's ceiling height.

Measuring for Clearance

When measuring the doorway height, consider the clearance needed for the door to open and close smoothly. This includes the space needed for the door handle and any hardware on the door.

To ensure adequate clearance, measure the height of your door handle and any hardware. Subtract this measurement from the doorway height. This is the minimum height your door should be to ensure it opens and closes smoothly.

Once you have your measurements, use them to order your door. Always double-check your measurements before placing an order to ensure you get the right size door. With accurate measurements, you can install a door that fits perfectly and functions smoothly.