How to Install or Replace Cabinet Handles and Knobs

Cabinet hardware is one of those details most people ignore until they notice it's worn, loose, or just doesn't match the kitchen anymore. When it comes time to change it out, the work is straightforward enough that there's no reason to call someone—you're just drilling holes and turning screws. The key is measuring accurately before you drill, because a misplaced hole in a cabinet door is harder to hide than you'd think. Done well, new hardware can make cabinets look refreshed without the cost or disruption of a full replacement. Whether you're upgrading from dated knobs to modern handles, or just tightening up loose hardware that's been rattling for years, the process is the same. Most cabinet doors will accept standard boring patterns, and you can usually work in an afternoon without removing doors from hinges. The real variable is how many old holes you're dealing with and whether you need to fill them first.

1. Strip Old Hardware First. Open the cabinet door and locate the screw holding the knob or handle in place. Use the appropriate screwdriver (usually Phillips, but check first) to back out the screw from inside the cabinet. Pull the knob or handle straight toward you once it's loose. If you're replacing matching pairs on double doors, remove one piece at a time to keep track of which holes go where.
2. Match Old and New Holes. Look at the holes left behind. If the new hardware uses the same boring pattern (hole spacing), you're done with this step. If the new hardware requires different hole locations, you'll need to fill the old holes. For minor cosmetic changes, marking where new holes go first before filling is smart—fill only the holes you won't be reusing.
3. Fill and Sand Flat. If old holes won't be reused, fill them with wood filler that matches your cabinet finish. Use a putty knife to pack the filler flush into the hole, slightly overfilled. Let it dry per the product instructions (usually 1-2 hours), then sand it level with 220-grit sandpaper. If the cabinet will be painted or stained later, a light primer coat over the filled area prevents shadowing.
4. Lock in Hole Spacing. On the new hardware packaging or product page, find the center-to-center distance between mounting holes. This is usually called 'bolt spacing' or 'hole pattern.' For single knobs, there's just one hole—measure from the top and side edges to locate it. For handles, you'll have two holes, often 3 to 4 inches apart. Write down these measurements and don't rely on memory.
5. Mark with Precision. Choose a reference edge—usually the top or side—and measure down (or across) from that edge to the center of where the hole should be. Use a combination square or ruler and a sharp pencil to mark the spot lightly. For handles with two holes, measure both the distance from the edge and the distance between the two holes to confirm placement. Double-check your marks before touching a drill to the door.
6. Load the Right Bit. Select a drill bit that matches the screw size for your new hardware. If the hardware comes with screws, the bit size is almost always printed on the package or the screw box itself. If not, measure the screw shaft diameter and use the next size down. Install the bit in your drill, set it to low speed, and test the fit on a scrap piece of wood if you're unsure. For cabinet doors, a standard twist bit works fine, but a spade bit or Forstner bit creates cleaner edges if you're doing many doors.
7. Drill Straight and Slow. Position the drill bit at the center punch mark and start at low speed. Let the bit do the work—don't force it. Drill straight through the door (perpendicular to the surface), stopping when the tape marker reaches the door face. If the door is thick or you're nervous about blowout, drill from the outside face, stop halfway through, then flip the door and finish from the inside to avoid splintering the finish side.
8. Screw In Tight. Insert the mounting screw through the back of the knob or handle (or through the first hole if it's a handle), then guide it into the hole you just drilled. Use the correct screwdriver to thread it in by hand first, then tighten firmly but not forcefully. For handles with two holes, insert both screws and tighten them evenly, alternating between the two so the handle pulls straight against the door. The hardware should sit flush against the door with no wobble.
9. Check Level and Function. Open and close the door a few times to make sure handles or knobs don't catch and the door operates smoothly. Place a small level against the handle or knob to check that it's not tilted. If the hardware is off-angle, back out the fasteners, adjust the position, and retighten. A crooked handle is more noticeable than you'd think and worth fixing on the spot.
10. Hide Screw Heads. Some hardware styles (particularly cup handles or recessed pulls) have visible screw holes on the inside of the door. If this bothers you, insert matching wood-tone filler or screw caps after tightening. Caps come with many handle styles and simply press fit over the screw heads. For a built-in look, use a color-matched wood filler and sand flush.
11. Scale Up Efficiently. Work through the rest of the cabinet doors using the same measurements and process. After the first two or three doors, the rhythm becomes automatic. If you're doing a full kitchen, doing matching upper and lower doors in the same location at the same time (like all the doors above the sink) keeps the layout consistent. Take breaks to avoid fatigue-induced mistakes.
12. Erase Marks and Verify. Wipe down cabinet fronts with a damp cloth to remove pencil marks and dust from drilling. Step back and look at the kitchen with doors closed and open. Check that all hardware is aligned, none is loose, and the overall look is consistent. Tighten any hardware that's slightly loose. If you see marks or scratches from the drilling process, use touch-up paint or stain appropriate to your cabinet finish.