A replacement handle can look almost identical to the one on your door and still not fit. The key to ordering with confidence is taking a few measurements before you remove anything. This door handle measurement guide UK explains what to measure on common internal, external, uPVC and composite doors, so you can choose compatible hardware first time.
Start by taking clear photos of both sides of the door, then measure in millimetres with a steel rule or tape measure. Keep the old handle in place while measuring where possible. It gives you fixed reference points and avoids guessing once the door furniture has been removed.
Door handle measurement guide UK: the essential checks
The measurements you need depend on the type of handle and lock fitted to the door. A lever handle on a timber internal door is measured differently from a uPVC lever/lever handle with a euro cylinder. Before ordering, identify whether you have a handle on a backplate, a handle on a round or square rose, a pull handle, or a uPVC/composite multipoint-door handle.
For most replacement handles, check the fixing centres, the distance between the spindle and keyhole or cylinder, the backplate size, spindle size and door thickness. These details affect whether the new product covers existing holes, works with the lock and fixes securely to the door.
Fixing centres
Fixing centres are the distance between the centres of the screw holes that secure the handle to the door. This is especially important for handles on long backplates and for uPVC door handles.
Measure from the centre of the top fixing screw to the centre of the bottom fixing screw. Do not measure from the edge of the screws or the outside edge of the handle. Existing screw holes that do not line up can leave visible damage, reduce the strength of the fitting and mean drilling fresh holes in the door.
On uPVC and composite doors, common fixing centres exist, but there is no safe substitute for measuring your own handle. Older doors, specialist products and previous repairs can all produce less usual dimensions.
PZ measurement for euro cylinder handles
If your door uses a euro cylinder, the PZ measurement is one of the most important figures. It is the centre-to-centre distance from the square spindle hole to the centre of the cylinder keyhole.
A 92mm PZ handle is common on many uPVC multipoint doors, while other sizes are available. Measure it directly rather than relying on a common size. A handle with the wrong PZ will not allow the spindle and cylinder to align with the lock case, even if the screw holes appear close.
The same principle applies to handles with a keyhole for a mortice sashlock. Measure from the centre of the spindle hole to the centre of the keyhole. This is often referred to as the handle centres or keyhole centres, but product descriptions may use slightly different wording. The measurement itself is what matters.
Backplate length and width
Measure the full visible length and width of the existing backplate. This helps you select a replacement that covers the old outline, fixing marks and any holes left by the previous furniture.
A new backplate can be larger than the old one if its fixing positions and lock centres are correct. A smaller plate may expose unfinished timber, faded paint or previous drill holes. On a front door, this is not only a cosmetic issue: exposed holes can provide a route for water into timber or make the installation less secure.
For handles on roses, measure the diameter of a round rose or the height and width of a square one. Also check whether the rose is a concealed-fix type, where screws sit behind a cover, or a visible-fix design.
Measure the spindle and the door thickness
The spindle is the square metal bar that passes through the latch or lock and connects both handles. Most domestic lever handles use an 8mm spindle, but exceptions exist, particularly on older furniture, commercial doors and bathroom sets. Measure the width of the square spindle rather than assuming.
Spindle length should suit the finished door thickness, including any plates or roses. A spindle that is too short may not engage properly in both handles. One that is too long can prevent the handles pulling tight to the door or may need trimming where the manufacturer permits it.
Measure the door itself at the edge, not just the visible face. Internal timber doors are often around 35mm or 44mm thick, but fire doors, external timber doors and glazed doors may be thicker. Handles, bolts and thumbturns are commonly supplied for a stated thickness range, so this figure is useful even when replacing like for like.
Check the lock before choosing a handle
The handle must work with the latch or lock already in the door. If the old handle has become loose, droops or returns slowly, the problem may be the latch spring rather than the handle itself.
A sprung handle has an internal spring cassette or mechanism to help return the lever to level. It is often a good choice where the latch has a light spring or where the door sees frequent use. An unsprung handle relies more heavily on the lock or latch spring. Neither is automatically better - compatibility and the condition of the lock are the deciding factors.
For a mortice latch, check the latch backset: this is the distance from the door edge to the centre of the spindle hole. It does not usually dictate the handle style, but it tells you whether the handle position will remain practical and properly placed on the door.
For a mortice lock with a keyhole, ensure the new handle's spindle-to-keyhole centres match the lock. For a bathroom lock, check the distance from the handle spindle to the bathroom turn and confirm the turn size, usually 5mm or 8mm depending on the lock and furniture. Bathroom releases should also be suitable for emergency opening from outside the room.
Measuring uPVC and composite door handles
uPVC and composite doors commonly use a multipoint lock operated by lifting the lever before turning the key. These handles need more careful matching than standard internal door furniture.
Measure the PZ distance, screw fixing centres, backplate length and width, and spindle size. Also establish whether you have a lever/lever handle, a lever/pad handle or an offset arrangement. A lever/pad handle has a moving lever on one side and a fixed pad on the other, often used to control entry from outside.
Look at the cylinder position in relation to the handle. Some handles have an offset layout, where the cylinder sits above or below the spindle. Ordering a centred handle for an offset lock, or the other way around, will not work.
If you are replacing the cylinder as well, measure it separately from the centre fixing screw to each end of the cylinder, including external security escutcheons where relevant. The cylinder should sit close to flush with the handle or escutcheon. Excessive projection can increase the risk of cylinder snapping on vulnerable installations.
Handing, finish and door use
Not every lever is universal. A cranked or shaped lever on a backplate may be handed for left- or right-opening doors. Stand on the side where the door opens towards you, then note which side the hinges are on. Product instructions may define handing differently, so compare the product image and description carefully before buying.
Finish matters too, particularly if you are replacing only one handle in a property. Satin chrome, polished chrome, polished brass, black and antique brass can look very different under natural light. Match nearby hinges, letterplates, locks and window furniture where a consistent finish is important.
For fire doors, communal entrances, offices and high-use areas, do not choose solely on appearance. Check that the handle is suitable for the door type, usage level and any required fire rating. Facilities managers should also consider whether the product needs through-bolts, concealed fixing, an emergency release or compatibility with access-control hardware.
A practical measuring routine before you order
Work through the door systematically: photograph the handle, measure screw centres, measure spindle-to-cylinder or spindle-to-keyhole centres, then record the backplate size, spindle size and door thickness. If the handle is on a uPVC or composite door, add the cylinder position and confirm whether the outside handle is a lever or pad.
Write each measurement down in millimetres and compare it against the product specification, rather than a photograph alone. If measurements are unclear or the existing lock has been altered, removing one handle carefully can reveal useful details on the lock case and spindle. Keep screws and parts together until the replacement has been fitted and tested.
Secure Choice can help customers source compatible door furniture, cylinders and replacement lock hardware, but accurate measurements are still the quickest route to the right part. A few minutes with a rule now can save a return visit, fresh drill holes and a door that cannot be secured properly.