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Door Size Conversion Chart

This page has our door size conversion guide to try and make it easier for our customers to see at first hand the different door sizes that are available, not all doors are available in all sizes, this is also available in PDF form at the foot of this page in an easy to print format.

Imperial sizes are the traditional sizes measured in "inches" or "feet and inches".

Metric sizes have been used by builders of new homes for about 30 years, they are a different height and have different widths/thickness from the imperial sizes.

Imperial sizes are normally 1 3inches thick (35mm) for older doors, the two larger sizes may be 40mm or 45mm.

Metric doors are normally 40mm thick 1 58 for more modern doors.

All FD30 (1/2 Hour fire doors) are 1 3inches - 45mm thick.

Door Size Conversion Chart 

Metric (mm)

Imperial (inches)

Imperial (feet & inches) 

1981mm x 306mm 78" x 12"  6' 6" x 1' 0"
1981mm x 381mm 78" x 15" 6' 6" x 1' 3"

1981mm x 457mm

78" x 18"

6' 6'' x 1' 6''

1981mm x 533mm

78" x 21"

6' 6'' x 1' 9''

1981mm x 610mm

78" x 24"

6' 6'' x 2' 0"

1981mm x 686mm

78" x 27"

6' 6'' x 2' 3''

1981mm x 762mm

78" x 30"

6' 6'' x 2' 6''

1981mm x 838mm

78" x 33"

6' 6'' x 2' 9''

2032mm x 813mm

80" x 32"

6′8″ x 2′8″

2040mm x 526mm

80 14" x 20 58"

6′8 14" x 1′8 58"

2040mm x 626mm

80 14" x 24 58"

6′8 14" x 2′0 58"

2040mm x 726mm

80 14" x 28 58"

6′8 14" x 2′4 58"

2040mm x 826mm

80 14" x 32 58"

6′8 14" x 2′8 58"

2040mm x 926mm

80 14" x 36 58"

6′8 14" x 3′0 58"

2085mm x 865mm 82" x 34"  6'10" x 2'10"

2134mm x 915mm

84″ x 36″

7′0″ x 3′0″

Please feel free to print the following pdf for reference, conversions are as accurate as possible.      

Easy Printable Version