Door Hinges

Cosmas interior door hinges are available in popular residential sizes, corner styles, and finishes. Use them for new door installations or to replace existing hinges when the dimensions, corner shape, and application are compatible.

The collection includes 3-1/2-inch and 4-inch hinges in Matte Black, Oil Rubbed Bronze, Polished Chrome, and Satin Nickel. Matching the hinge finish to the door knobs, levers, or other hardware creates a coordinated appearance throughout the room.

Available door-hinge sizes

• 3-1/2-inch hinges: a commonly used size for many standard residential interior doors.
• 4-inch hinges: a larger option for doors already prepared for a 4-inch hinge or applications requiring that size.

When replacing hinges, measure both the height and width of an existing hinge while it is opened flat. Select the same dimensions unless the door and frame will be modified for a different size.

Square and radius corner styles

• Square corners: designed for mortises with straight, 90-degree corners.
• 1/4-inch radius corners: have a smaller rounded corner profile.
• 5/8-inch radius corners: have a larger, more noticeably rounded profile.

The corner style should match the existing recess in the door and frame. Installing a different corner shape may require chiseling, routing, or other modification to the mortise.

Available hinge finishes

• Matte Black: a dark, understated finish for modern, farmhouse, and transitional doors.
• Oil Rubbed Bronze: a deep bronze finish that coordinates with warm wood tones and traditional hardware.
• Polished Chrome: a bright, reflective silver finish with a clean contemporary appearance.
• Satin Nickel: a softly brushed silver finish suited to a wide range of residential interiors.

Browse the existing Matte Black Door Hinges page to view that finish separately.

Replacing existing door hinges

For the easiest replacement, match the hinge height, width, corner radius, number of screw holes, and general hole pattern. Also confirm the number of hinges required for each door. Existing screw holes may need repair or repositioning if the new pattern differs.

Cosmas door hinges feature five knuckles, removable pins, durable construction, and included mounting screws. Single hinges and multipack quantities are available on participating product pages.

Complete the door with coordinating knobs, levers, handlesets, and deadbolts from the Cosmas Door Hardware collection.

Frequently Asked Questions

How do I measure a door hinge?

Open the hinge flat and measure its full height from top to bottom and its full width from side to side. A hinge measuring 3-1/2 inches in both directions is commonly described as a 3-1/2-inch hinge.

Should I choose a 3-1/2-inch or 4-inch door hinge?

When replacing existing hinges, use the same size already installed on the door. For a new installation, hinge size and quantity should be selected according to the door dimensions, weight, frame preparation, and applicable building requirements.

How can I determine the corner radius of my hinge?

Examine the corners of the existing hinge leaf and the recessed mortise. Square-corner hinges have 90-degree corners. A 1/4-inch radius has a smaller curve, while a 5/8-inch radius has a broader rounded corner. Compare the existing hinge with the corner diagrams shown on the product page.

Can I replace a square-corner hinge with a radius-corner hinge?

It may be possible, but the hinge will not fit the existing mortise correctly without modifying the door or frame. Matching the existing corner style usually provides the simplest and cleanest replacement.

Does the screw-hole pattern need to match?

Matching the existing pattern makes installation easier. A different pattern may still be usable, but old holes might need to be filled and new pilot holes drilled. Avoid positioning new holes too close to damaged or enlarged existing holes.

Are Cosmas door-hinge pins removable?

The hinges in this collection are listed with removable pins. This allows the hinge leaves to be separated when removing or rehanging a door. Confirm the specifications on the selected product page.

Are mounting screws included?

Yes. Mounting screws are included with Cosmas door hinges. Review the individual listing for product-specific details and verify that the supplied screws are appropriate for the door and frame material.

Are these hinges sold individually or in packs?

Individual hinges are available, and participating products also offer multipack quantities. Check the pack-quantity selector on the product page before adding hinges to the cart.

How many hinges do I need for each door?

The correct number depends on the door height, weight, material, and local requirements. Many standard residential interior doors use three hinges, but the existing installation or door specifications should determine the appropriate quantity.

Are door hinges and cabinet hinges interchangeable?

No. Door hinges are designed for full-size doors and frames. Cabinet hinges use different mounting methods, overlays, dimensions, and operating mechanisms. Browse the separate Cosmas Cabinet Hinges collection for cabinetry applications.

Compare all available sizes, corner styles, and finishes in the complete Cosmas Door Hinges collection.