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Useful Data & Information. Conversion table.

Metric Conversion Table

Set out below are approximate conversions for most popular stock door sizes, shown first in Imperial unit with corresponding Metric sizes alongside.

IMPERIAL METRIC
78’’ x 12’’ 1981 mm x 305 mm
78’’ x 15’’ 1981 mm x 381 mm
78’’ x 18’’ 1981 mm x 457 mm
78’’ x 21’’ 1981 mm x 533 mm
78’’ x 24’’ 1981 mm x 610 mm
78’’ x 27’’ 1981 mm x 686 mm
78’’ x 28’’ 1981 mm x 711 mm
78’’ x 30’’ 1981 mm x 762 mm
78’’ x 33’’ 1981 mm x 838 mm
78’’ x 36’’ 1981 mm x 914 mm
78’’ x 42’’ 1981 mm x 1067 mm
78’’ x 46’’ 1981 mm x 1168 mm
78’’ x 48’’ 1981 mm x 1220 mm
78’’ x 54’’ 1981 mm x 1372 mm
78’’ x 60’’ 1981 mm x 1524 mm
80’’ x 18’’ 2032 mm x 457 mm
80’’ x 32’’ 2032 mm x 813 mm
81’’ x 18’’ 2057 mm x 457 mm
81’’ x 33’’ 2057 mm x 838 mm
82’’ x 34’’ 2082 mm x 864 mm
84’’ x 36’’ 2134 mm x 914 mm
20.75’’ x 80.25’’ 526 mm x 2040 mm
24.50’’ x 80.25’’ 626 mm x 2040 mm
28.50’’ x 80.25’’ 726 mm x 2040 mm
32.50’’ x 80.25’’ 826 mm x 2040 mm

General Specification

Doors – All doors we supply are built from Kiln Dried Lumber stocks. Please see our modern Methods of Door Construction page for more info.

Exterior Mortice & Tenon Jointed Doors – will normally be supplied 44mm (1¾") thickness. All panels are silicone or mastic sealed to improve weather tightness.

Hardwood Internal Doors – are normally dowel Jointed. All Imperial sizes are 35mm (1.4") thickness. Some of the Metric Sizes ( 526mm (20.7") / 626mm (24.65") / 726 mm / 826mm × 2040mm (32½" × 80.3") ) are supplied in 40mm (1.55") thickness. If you have any doubts please enquire about the exact model you require.