Knowing how to replace a doorknob is one of the quickest wins in home improvement. It takes about 15 minutes and requires only a screwdriver — and if you’ve never done any home repair before, this is a great first project that builds confidence and actually makes a difference in how your home feels.

Before You Buy a New Knob

Not all doorknobs are the same. You need to know two measurements before buying: the backset (distance from the edge of the door to the center of the hole, usually 2-3/8 or 2-3/4 inches) and the bore hole diameter (usually 2-1/8 inches for standard doors). Most new knobs come with adjustable latches that fit both common backsets, so don’t stress too much. Just bring your old knob to the hardware store or measure before you go.

What You’ll Need

A Phillips head screwdriver, a flathead screwdriver, and your new doorknob set. That’s it. The new knob will come with all the hardware you need including screws and a new latch plate.

Step 1 — Remove the Old Knob

Look for screws on the interior side of the knob (the side facing into the room). Unscrew them and the knob should pull apart into two pieces. If there are no visible screws, look for a small slot or pinhole on the neck of the knob — insert a flathead screwdriver or a pin to release it. Once both sides are off, unscrew the latch plate on the edge of the door and slide the latch mechanism out of the hole.

Step 2 — Install the New Latch

Slide the new latch into the hole in the door edge with the angled side of the latch facing the direction the door closes. Screw the latch plate into the door edge. Make sure it’s flush — if it sticks out, the door won’t close properly.

Step 3 — Attach the New Knob

Thread the exterior knob through the latch mechanism hole so the spindle (the square rod in the middle) sticks through to the inside. Line up the interior knob, making sure the spindle slides into it correctly, then drive the screws in. Don’t overtighten — snug is enough. Test the knob before closing the door fully.

Step 4 — Check the Strike Plate

The strike plate is the metal piece on the door frame where the latch clicks in. If your new latch doesn’t line up perfectly, you may need to reposition the strike plate slightly — just loosen the screws, shift it, and retighten. If there’s a gap, a little chisel work on the mortise (the cutout in the frame) will do the trick, but that’s only if it’s badly misaligned.

Quick and Satisfying

Doorknob replacement is one of those jobs where the hardest part is deciding which new knob you like. The actual work takes less time than reading this article. Once you’ve done one, you’ll wonder why you ever called anyone for something like this.

Just moved into a new home? Check out our guide on what to do when you move into a new house.

Disclosure: This post contains affiliate links. If you click and make a purchase, FourByFourDIY earns a small commission at no extra cost to you.