Instructions for Measuring a New Door


Do you want to replace the door in your house? The mistake of ordering the wrong size is surprisingly common, but it can be very costly.

If the seller agrees to return the door, you may still have to cover shipping charges. And then there’s the hassle of tracking down a replacement door and footing the bill for shipping it again.

If you follow these guidelines, you should be able to determine the appropriate size for yourself.

Honesty is essential. If you aren’t replacing the door leaf and frame altogether, you should check the alignment of your current door frame. The most accurate verification method is to take diagonal measurements from corner to corner in both directions. If there is a discrepancy of more than 5 mm, you may need to have the frame adjusted by a professional carpenter or purchase a new one.

Also, check the frame for damage. A door’s weight can reach 50 kg, so it must hold up. The door and its frame should be replaced if the damage is extensive.

Finding out what size door is needed entails gathering the following information.

Doors: leaf width

Locations of Door Hardware

Size of the door frame

Door leaf measurements

Take multiple measurements of the original door’s height, breadth, and depth at various heights and widths. If there is a wide range of numbers, go with the largest ones. A door that is too large may usually be trimmed down a bit, but a door that is too small cannot have anything added to it.

The Proper Way to Gauge Hardware

Handles, locks, latches, and hinges, among other door hardware, are not typically included. It’s possible you could reuse the current fixtures if they’re still in good shape. If you don’t already have it, you’ll need to acquire new hardware and have it custom-fit to your door.

Before replacing worn-out hardware, take careful measurements to ensure the new components align appropriately with the frame.

Running a measuring tape from the present door’s top to the top of each hinge (there should be at least three) will give you an accurate measurement of the hinges. Keep the tape straight and flat against the door’s surface.

The size of the hinges and the hinge reveal (the distance from the hinge’s edge to the door’s edge) must also be measured.

The latching mechanism, or lock set, should then be measured for placement. The door may not close properly if the latch is not precisely aligned with the appropriate hollow in the frame. Measure from the door’s top and side to the lock set’s middle.

A Guide to Measuring Your Door’s Frame

Ensure you’re measuring the door frame and not just the trim around it. Door stops and architrave (or other wall trim) are standard fixtures.

Determine the frame’s dimensions by measuring its width and height from various angles. If there is a discrepancy in the numbers, use the smaller ones. Always begin at the top of the carpet to prevent the door from scraping, and remember to account for this when installing new flooring.

Measure just from the face of the door post to the face of the door stop to get the depth of the frame. Wall-mounted molding and trim should not be included.


You can shop for a suitable replacement door now that you have the specifications. It’s possible to trim most wooden doors to size, but not all models can be customized in this way.

If your frame isn’t a typical size, you might want a custom-made door. This approach typically costs more but guarantees a snug and comfortable fit.

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