Opening Angles for Concealed Hinges (90°, 110°, 165°): Meaning & Selection

October 16, 2025

The opening angle of a concealed hinge defines the maximum degree to which a cabinet door can swing open. Standard concealed hinges typically offer an opening angle of 110°, whilst wide-angle hinges reach up to 165°, and specialised corner hinges often operate at 30°, 45°, or 90°.

What is the opening angle exactly?

The opening angle describes the geometric pivot range of a door from its fully closed position (0°) to its maximum open position. The mechanics of a hinge operate much like a human knee joint – the design of the lever arms and the articulating mechanism dictates the exact physical endpoint of movement. Exceeding this angle without causing damage to the fitting or the cabinet front is impossible.

Selecting the correct angle depends on the cabinet construction, the placement of the unit within the room, and the type of internal fittings used.

Typical types and variations

Different articulation geometries are utilised depending on the intended application:

Standard angles (90° to 110°): This is the classic specification for conventional wardrobes and kitchen cupboards. Concealed hinges / cabinet hinges 110 degrees provide sufficient clearance for standard access. For narrow units or where a door must not project too far into the room, concealed hinges / cabinet hinges 90 degrees are frequently used.
Wide angle (155° to 165°): These hinges swing the door almost parallel to the adjacent cabinet carcass. Concealed hinges / cabinet hinges 165 degrees are strictly necessary when internal drawer runners are installed inside the cabinet. Only this wide angle provides complete clearance of the internal carcass opening, ensuring the full extension runner does not graze the inside face of the door.
Angled hinges for corner units (30° to 135°): With angled cabinets or corner configurations, the carcass geometry deviates from the standard 90-degree layout. In these cases, fittings such as concealed hinges / cabinet hinges 45 degrees are used to adapt the front panel geometry to the angled carcass.

Dimensions, standards, and technical values

Regardless of the opening angle, most hinges adhere to standardised installation dimensions used across furniture making:

Cup diameter: The drilled hole in the cabinet front is almost universally 35 mm for standard fittings. Consequently, concealed hinges 35 mm are the industry norm in professional cabinet making. Mini hinges utilise a 26 mm cup.
Mounting type: The angle functions independently of the mounting type. Whether selecting full overlay (the door completely covers the carcass edge), half overlay / twin application (two doors share a single central partition wall), or concealed hinges inset mounting (the door sits flush within the carcass opening), the choice only dictates the crank of the hinge arm.
Damping: Modern fittings, such as concealed hinges / cabinet hinges with damping (Soft Close), integrate a hydraulic damper within the hinge arm that smoothly cushions the door over the final degrees of its closing path.

Practical use and selection

When planning your fittings, the opening angle must be coordinated precisely with the surrounding environment. If a cabinet sits directly against a wall, a 165-degree hinge will inevitably cause the door handle to hit the plaster when opened carelessly. Here, a 90-degree hinge or the addition of opening angle restrictors (small plastic clips that mechanically limit the angle, e.g. from 110° to 86°) represents the technically correct solution.

For installers, the cruciform mounting plate is also essential. It connects the concealed hinge to the carcass side panel. Using eccentric screws on the hinge arm, the door gap alignment can be adjusted in three dimensions (height, depth, and lateral overlay) after installation, typically within a range of +/- 2 mm.