When choosing new door handles it is always recommended to measure your door to ensure that the handles will fit perfectly.

How to Measure Internal Door Handles

There are a few different measurements that will be useful for you to know when it comes to how to measure internal door handles;

Door Thickness -
Measure the door from the inside to the outside. Many internal doors are commonly made to 35mm Thickness. A standard FD30 Fire Door is usually 44mm Thickness. External doors will also often measure 44mm, and more modern UPVC doors and insulated doors will usually be much thicker.

There are also always custom-sized doors that don't fit the standards - Don't worry if you have a different measurement we can always supply the relevant sized fixings to connect the handles from both sides of the door.

Door Height - 
Measure the door from the bottom to the top of the door.

The standard height of a door is usually either 1981mm (78"), or occasionally 2032mm (80") or 2040mm.   Once again there are always custom-sized doors, especially in older properties.

This measurement is particularly useful if you are planning to buy new door hinges to calculate the load-bearing requirement of the hinges.

Stile Width -
Measure from the edge of the door to the edge of any molding, panelling or glazing on the door.

The width of the stile is one of the most important factors in deciding on the type of door handles, door knob, and related latch or lock mechanism you can fit.  A narrow stile may restrict the length of latch that you can fit and therefore the type of handle or knob to suit.

Door Knobs will often be fitted into the midrail section of the door where the door stile is too narrow.

Backset -
Measure from the edge of the door to the centre of the door knob or handle.

The industry standards are usually either 44mm / 57mm / 82mm / 107mm / 130mm. Ideally you will try and choose the backset measurement that sites the door handle in the middle of the door stile.

We recommend that a shorter backset is chosen when a door is glazed to avoid the latch mechanism meeting the rebate of the glass.

When fitting a door knob it is essential that a longer backset measurement is selected as if the door knob is fitted too close to the edge of the door then you will not be able to operate the door knob without scraping your knuckles on the door frame.

Centre-to Centre -
Measure from the centre of the spindle hole to the centre of the lock hole.

The industry standards for UK locks vary on the type of lock being used;

UK Lever Lock - 47.5mm
UK Bathroom Lock - 47.5mm
UK Euro Profile Cylinder Lock -  47.5mm
UK Oval Profile Cylinder Lock -  48.5mm
Multi Point Euro Profile Cylinder Lock - 70mm / 92mm.

Taking a note of all these door measurements will ensure that you can choose the right lock latch and door handle to suit the door perfectly first time.

If you have any questions please contact one of the door handle specialists at More Handles.  Tel 01228 516516