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Size Conversion Guide

At unique doors we’ll do anything we can to make the job that little bit easier. We hope our size conversion chart helps, but remember if you can’t find what you’re looking for on the site. Simply give us a call at 0113 897 0980.

Common parts of the door

Traditional door parts
(click on the door to enlarge)
Cottage door parts
(click on the door to enlarge)
.
Modern V-Groove door parts
(click on the door to enlarge)
Modern Inlay door parts
(click on the door to enlarge)

STANDARD INTERIOR NON FIRE RATED DOORS (NFR)

INCHESSTANDARD IMPERIAL DOOR SIZES (in millimetres)
12x78 (1 3/8" thick)306x1981x35
15x78 (1 3/8" thick)381x1981x35
18x78 (1 3/8" thick)457x1981x35
21x78 (1 3/8" thick)533x1981x35
24x78 (1 3/8" thick)610x1981x35
27x78 (1 3/8" thick)686x1981x35
30x78 (1 3/8" thick)762x1981x35
32x80 (1 3/8" thick)813x2032x35
33x78 (1 3/8" thick)838x1981x35
 
INCHESSTANDARD METRIC DOOR SIZES (in millimetres)
20 45/64" (1 37/64" thick)526x2040x40
24 5/8" (1 37/64" thick)626x2040x40
28 5/8" (1 37/64" thick)726x2040x40
32 1/2" (1 37/64" thick)826x2040x40
926x2040x40
 
CODECUSTOM DOOR SIZES
C35Any door size up to a maximum of 915x2135x35
C35XLAny door size up to a maximum of 1220x2440x35
C40Any door size up to a maximum of 915x2135x40
C40XLAny door size up to a maximum of 1220x2440x40
 

FIRE RATED INTERIOR DOORS (FD30)

INCHESFD30 RATED IMPERIAL FIRE DOOR SIZES (in millimetres)
12x78 (1 47/64" thick)306x1981x44
15x78 (1 47/64" thick)381x1981x44
18x78 (1 47/64" thick)457x1981x44
21x78 (1 47/64" thick)533x1981x44
24x78 (1 47/64" thick)610x1981x44
27x78 (1 47/64" thick)686x1981x44
30x78 (1 47/64" thick)762x1981x44
32x80 (1 47/64" thick)813x2032x44
33x78 (1 47/64" thick)838x1981x44
 
INCHESFD30 RATED METRIC FIRE DOOR SIZES (in millimetres)
20 45/64" (1 47/64" thick)526x2040x44
24 5/8" (1 47/64" thick)626x2040x44
28 5/8" (1 47/64" thick)726x2040x44
32 1/2" (1 47/64" thick)826x2040x44
926x2040x44
 
CODEFD30 RATED CUSTOM FIRE DOOR SIZES
C44Any door size up to a maximum of 915x2135x44
C44XLAny door size up to a maximum of 1220x2440x44