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How to Measure an Interior Door: A Practical Measurement Guide

Taking accurate measurements before ordering a new interior door matters for installation, frame selection and the overall application process. Measurements should be taken at several points across the door opening, not just one.
01

How to Measure Door-Opening Width

Measure the door opening from wall to wall at the top, middle and bottom, and record all three measurements. Give particular attention to the narrowest measurement. If an existing frame or architrave is present, state clearly whether it is included.

02

How to Measure Door Height

Measure from the floor to the top of the door opening at the right, centre and left. Use the finished floor level as the reference; if parquet, tile or another floor finish has not yet been installed, be sure to note this.

03

How to Measure Wall Thickness

Measure the full wall thickness at the door opening in several places. Wall thickness is important for frame selection; composite frame and architrave systems can be considered for different wall thicknesses on a project basis.

04

How to Measure When There Is an Existing Door

Measuring only the existing door leaf is not enough. Also assess the internal frame, wall opening and wall thickness. Measurements taken before removing the existing door can be useful preliminary information, but confirming them before ordering is helpful.

05

Common Measurement Mistakes

Common mistakes include measuring at only one point, overlooking the finished floor level, mistaking the frame or architrave for the wall opening, ignoring wall irregularities, using only the old door-leaf dimensions, and mixing centimetres with millimetres.

06

How to Record Your Measurements

Width: ___ cm Height: ___ cm Wall thickness: ___ cm Number of doors: ___ Door opening direction: right / left Floor status: finished / unfinished

07

How to Determine the Door Opening Direction

Note which way the door will swing in relation to the usable space, furniture and circulation area. If the right- or left-hand description is unclear, sharing the hinge position and swing direction with a photo or simple sketch is useful.

08

What Happens After Measuring?

You can share your measurements with Hasel Door. The model, frame, architrave and project requirements can then be considered together to clarify the next step.

HASEL DOOR

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