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How to Choose & Replace Door Hinges (Size, Radius, and Easy Install)
Updating hinges to match new knobs or levers is one of the quickest ways to refresh your doors. This guide shows you how to pick the right finish, size, and corner radius — and how to replace hinges without removing the door.
SAVE 10% on all door hinges with code DOORHINGE10 at checkoutDetermine the Finish You Need
Door hinges come in the same popular finishes as modern door hardware: oil rubbed bronze, flat black, and satin nickel. Brass is back too — think brushed brass, satin brass, and champagne brass. Match your hinges to your knobs/levers for a cohesive look throughout the home.
Determine the Hinge Size
Most homes use two sizes:
- 4" hinges on exterior doors
- 3-1/2" hinges on interior doors
How to measure: Open the hinge and measure the full height of one leaf (top to bottom). On standard hinges, that height usually equals the leaf width.
Determine the Corner Radius
Hinge corners come in three common styles:
- Square Corner (no curve)
- 1/4" Radius
- 5/8" Radius
Not sure if it’s 1/4" or 5/8"? Use the simple coin test:
- Hold a dime to the corner — if the curve matches, it’s likely 1/4" radius.
- Hold a quarter to the corner — if it matches, it’s likely 5/8" radius.
How to Install Door Hinges (Without Removing the Door)
Time: ~10–20 minutes per door • Difficulty: Easy • Tools: Phillips screwdriver or drill/driver with Phillips bit
- Remove screws from one hinge only.
Start at the top or bottom hinge. Interior (3-1/2") hinges usually have 6 screws; exterior (4") have 8.
- Install the new hinge and secure all screws.
Keep the door closed while you swap to maintain alignment.
- Repeat for hinge #2.
- Repeat for hinge #3.
Note: Most U.S. homes built in the last 40 years use three hinges per door, which makes this a simple one-person job. Older homes with two hinges may need a helper to hold the door slab while you swap each hinge.
Extra Tips
- Hinge pins: You don’t need to remove the pin to replace a hinge.
- Hole spacing: New screw holes don’t have to match the old ones exactly; the leaves cover offsets.
- Sticking screws: Hand-start screws to avoid cross-threading; use a drill clutch to prevent stripping.
- Sagging door? Upgrade one screw per leaf to a longer (e.g., 2–3") screw into the stud for lift and strength.
Door Hinge FAQs
Do interior and exterior doors use different hinge sizes? Typically yes — 3-1/2" for interiors and 4" for exteriors. Always measure to confirm.
How many hinges per door? Most residential doors use three; heavier/taller doors may use four.
What corner radius do I need? Use the dime/quarter coin test above to match 1/4" or 5/8" radius; square corners have no curve.
Should hinge finish match my knobs/levers? It’s the cleanest look and most common choice, especially in open-plan spaces.
Shop Door Hinges
- All Door Hinges — Oil Rubbed Bronze, Flat Black, Satin Nickel, Brass finishes & more
- Hinge Basics & Finishes
