How to Measure Your Door

No need to remove the door — just measure:

• Width: Edge to edge across the door face

• Height: Top edge to bottom edge (not the sill)

• Thickness: Door edge where the latch is
  

Record as: Width × Height × Thickness

Example: 32" × 80" × 1¾"

We’ll build the new door to match these exact dimensions.

If your old door rubs or sticks:
Skip this method and measure the finished opening instead. 

 You’re measuring the clear space inside the frame, where the door actually moves.

This method is right if:

• You’re keeping your frame

• Your current door doesn’t fit well

• You have a framed opening from a renovation

You’ll take four measurements:

Left Height (A–B)

Inside top jamb to floor or sill

Right Height (C–D)

Inside top jamb to floor or sill

(Heights may differ; this is normal.)

Top Width (E–F)

Inside left jamb to inside right jamb

Bottom Width (G–H)

Inside left jamb to inside right jamb

(Floors can slope; widths may vary.)

Record as: A–B, C–D, E–F, G–H



Example: 80¼" | 80" | 31⅞" | 32"

We’ll size your new door slightly under these numbers for a clean field fit.

Tip: Measure only the inner wooden frame, not the casing or trim. 

A rough opening is simply the unfinished space framed by studs.

Measure:

• Width: Stud to stud

• Height: Subfloor to underside of header

• Depth: Wall thickness to confirm jamb depth
  

Record as: Width × Height × Depth


Example: 34½" × 82" × 4⅝"

If you see bare studs, you’re in the right place.
If you see painted or stained trim, use the finished opening method instead. 

Choose this option when your new door will include a jamb. This applies to porch and patio openings, breezeways, or any situation where there is no existing jamb to reuse.

Measure the rough opening:

• Width: Stud to stud

• Height: Subfloor to header

• Depth: Wall thickness
  

Record as: Width × Height × Depth



Example: 32½" × 82" × 4⅝" 

You’ll take four measurements:

Left Height (A–B)


Inside top jamb to floor or sill

Right Height (C–D)


Inside top jamb to floor or sill 

(Heights may differ — this is normal.)

Top Width (E–F)

Inside left jamb to inside right jamb

Bottom Width (G–H)

Inside left jamb to inside right jamb
(Floors can slope; widths may vary.)

Record as:


A–B, C–D, E–F, G–H
Example: 80¼" | 80" | 31⅞" | 32" 

Measure:

• Width: Inside jamb to inside jamb at the base

• Height A (Straight Side): Bottom to where the arch starts

• Height B (Overall): Bottom center to peak of the arch

• Radius: If known (we can calculate it if not)

Older frames shift over time — note small variations.


Record as:

Width, Height A, Height B, Radius (if known)

Example: Width: 36" | Height A: 68½" | Height B: 82" | Radius: unknown