How to Measure Your Kitchen for Cabinets

The whole job comes down to a handful of numbers. The length of every wall. How high the ceiling sits. And exactly where your windows, doors, plumbing, and outlets land. Get those right and the rest falls into place. Get one wrong and a cabinet shows up half an inch too wide for the run, and that is not something you sand your way out of.

What follows is the measuring procedure, start to finish: the tools, what to measure and in what order, how to write it down so nothing goes missing, and the slips that quietly wreck an order. If you want the standard cabinet dimensions themselves, those live in our companion guide on understanding cabinet sizes. We're staying on the tape measure and the sketch here. By the end you'll have a clean cabinet list you can send our Tampa team for a written wholesale quote.

What to grab before you start

You don't need much. A steel tape measure that reaches at least 25 feet, so you can span a full wall without flipping the tape halfway through. A pencil rather than a pen, because you will erase. Graph paper or a printed grid, which keeps the sketch roughly to scale and stops the proportions from lying to you. A level, if you own one, to check whether a wall actually stands plumb. A second person makes the long walls easier, though you can manage alone by hooking the tape on a corner.

One habit matters more than any of that gear. Write everything in inches. Not feet-and-inches, just inches. A run recorded as 122 leaves nothing to misread. Ten feet two inches invites a math slip the moment you start adding cabinets together. Pick inches and stay there for the whole room.

Measure the walls corner to corner, at two heights

Start with the bare walls. Measure each one corner to corner and write the number down before you move on. Then do the thing most people skip. Measure that same wall again at a different height, once around counter level and again up near the ceiling. Walls are almost never perfectly straight, and a corner that bows out an inch between the floor and the ceiling changes which cabinets fit.

When two readings of the same wall disagree, the cabinets have to clear the tightest spot. So record the smaller number as the one that governs your layout, and note the difference too. A wall that drifts is a wall your installer ends up scribing and shimming. Flag it now and you skip the surprise later.

Get the ceiling height, in more than one spot

Measure floor to ceiling, and take that reading in at least two places along each wall. Floors slope. Ceilings sag. It's common in older Tampa homes that have settled over the decades, and a single reading can be off by an inch from one end of the room to the other.

Ceiling height is the number that decides your tall cabinets and how high your wall cabinets can climb. It's the line between cabinets that run all the way up and a gap you fill with trim. You don't have to memorize the size charts to capture it. Just get the height down accurately and let us match it to a cabinet that fits. The sizes guide lays out how those heights line up if you want the background.

Mark every window, door, and opening

Now map the interruptions. For each window and door, record its width and its height, and the part people forget, its distance from the nearest corner. Measure to the trim, the actual casing the cabinet has to dodge, not to the glass or the door slab. Cabinets bump into trim, not into panes.

Do the same for any opening, archway, or pass-through that breaks a wall. A window sitting low behind where the sink goes, or a door that swings into the corner you wanted for a base cabinet, can reshape the whole plan. Catch it on paper while it still costs nothing to fix.

Locate the plumbing, the range, and the electrical

This is the step that separates a usable measurement from a rough guess. Cabinets get cut and ordered around the mechanical stuff, so mark the centerline of each one and its distance from a fixed corner:

• Sink plumbing: the center of the drain and the water supply lines, since the sink base is built open to clear them.
• Range or cooktop: the gas line or the electrical supply, plus the width of the appliance opening you need to leave.
• Refrigerator: the width and depth of the space it sits in, and the water line if it has an ice maker.
• Outlets, switches, and the vent or hood location: every one, by its centerline, so nothing winds up buried behind a cabinet you can't open.
• Soffits, bulkheads, radiators, or any framing that juts out and shortens the space a cabinet can occupy.

Write it down so you can't misread it later

Sketch the room from above, one wall at a time, on the graph paper. It doesn't need to be pretty. It needs every number on it: wall lengths, ceiling height, and the distance from a corner to each window, door, appliance, and plumbing line. Label which wall is which. A week from now you won't remember whether the 38-inch gap was by the window or the back door, so the sketch has to say.

Then measure twice. Not as a slogan. As a real second pass with the tape before you trust a number. The errors that hurt are the ones that pile up. A quarter inch off on three cabinets in a row becomes three quarters of an inch, and the box on the end has nowhere to go. Catching that on the second pass costs you a minute. Catching it after the order ships costs you a cabinet.

The mistakes that wreck an order

Most bad orders trace back to the same short list of slips, and each one is avoidable once you know to watch for it:

• Treating an out-of-square corner as square. Measure both heights and trust the tighter number, or a base cabinet won't seat.
• Measuring to the glass or the door instead of the trim. The casing is what the cabinet collides with.
• Forgetting that a run rarely lands on an exact cabinet width. Filler strips absorb the leftover inches, so a small gap is fine; a layout cut too tight is not.
• Not noting which way a door or drawer should face. Hinge side and door swing matter, especially next to a wall, an appliance, or another cabinet.
• Rounding up to force a fit. Round down to the nearest standard width instead. Too tight can't be installed; a filler gap disappears behind clean trim.
• Skipping the plumbing and outlet centerlines. A sink base over the wrong spot, or an outlet sealed behind a box, means a redo.

Turn the measurements into a cabinet list

A cabinet list is just your plan written out as cabinets: how many of each type, what width, and which way the doors face. Something like two 36-inch base cabinets, one 30-inch sink base, a run of 36-inch wall cabinets, a tall pantry on the end. Widths come in 3-inch increments, so you're matching your wall lengths to the closest standard sizes and letting fillers swallow the remainder. The sizes guide walks through the base, wall, and tall families if you'd rather draft the list yourself.

Here's the part the big-box guides skip. You don't have to get the cabinet codes right, and you don't have to nail the nomenclature. Send us the wall numbers, the ceiling height, the plumbing and appliance locations, and your sketch. Our in-house team converts all of it into standard sizes and a real cabinet list. A rough sketch and accurate measurements are genuinely enough. We'd rather check your numbers than have you guess at part codes.

While you're at it, lean toward a finish. We run six shaker finishes. Purity White is our brightest, most versatile white. Seashell Cream reads as a warm off-white. Modern Gray is a mid-tone greige that handles almost any room. Silver Gray is the lightest and coolest of the grays. Victory Gray is a dramatic charcoal that works well on an island. And Wood Color is a natural medium-brown grain. Not sure how one reads in your light? We ship free full-size door samples, no charge, usually arriving in three to five business days, so you can set the real thing in the real room before you commit.

RTA or assembled: decide before you send the list

We stock both, and the choice shapes your quote, so settle it up front. RTA cabinets ship flat, which keeps freight lower since you're not paying to move empty boxes around; they get assembled on site before they're hung. Assembled cabinets arrive built and ready to hang, which saves the on-site labor but takes up more room on the truck.

Neither is automatically cheaper across the whole job. RTA can win for a handy DIYer or a crew with time on their hands. Assembled tends to win when install labor is the expensive part and you want the work moving fast. Tell us which way you're leaning and we'll quote it that way.

Send it to us and get a written quote

Once your sketch is marked up and your numbers are double-checked, send the whole package our way: the wall measurements, ceiling height, window and door positions, plumbing and appliance locations, your finish pick, and whether you're leaning RTA or assembled. Add your ZIP if you'll want delivery instead of pickup. Our team at the Tampa warehouse turns that into a written wholesale quote and confirms a timeline.

Core door styles and standard sizes sit on the shelf at 6419 North 50th Street, so stock items are often ready within days. Anything special-order gets a confirmed timeline written right on the quote. From there it's your call how it reaches you: pick up at the warehouse, take Tampa-area delivery, or have it freighted to a job farther out. When your measurements are ready, call us at (813) 644-2034 or send your list and sketch for a free written wholesale quote, and we'll check your numbers before anything gets ordered.