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.