Yes, you must measure carefully when planning for new kitchen cabinets. Good measurements prevent costly mistakes. This guide will show you how to measure for cabinets in your kitchen right. We will cover everything from the walls to the floors. Taking the right steps now saves time and money later. This detailed kitchen cabinet measurement guide helps you get it right the first time.
Why Accurate Measurement Matters So Much
Getting the size of your kitchen cabinets right is super important. Small mistakes grow into big problems. If a cabinet is too big, it won’t fit. If it is too small, you waste valuable space. Accurate measurements ensure your new kitchen looks good and works well. They also make sure appliances fit easily. This process involves determining kitchen cabinet dimensions precisely.
The Tools You Need
Before you start, gather your tools. Having the right tools makes the job much easier and more accurate.
- Tape Measure: Use a good quality, sturdy metal tape measure. A retractable one is best.
- Pencil and Paper/Notepad: Bring plenty of paper for notes. You will take many measurements.
- Level: A long level (2-foot or 4-foot) helps check if walls and floors are straight.
- Calculator: For adding up spaces and checking math.
- Straight Edge or Long Ruler: Useful for drawing straight lines on your plans.
- Painter’s Tape (Optional): Good for marking where cabinets will go on the floor.
Step 1: Prep Your Kitchen Space
You cannot measure a cluttered room well. Clear the area first.
Clearing the Workspace
Take everything out of the area where the cabinets will go. This means removing old cabinets, countertops, and appliances if possible. You need bare walls and floors. This helps you see the true space available.
Checking Walls and Corners
Walls are rarely perfectly straight or square. You must check this.
How to Check for Squareness:
- Measure from one corner to the opposite corner along the floor. Write this number down (Measurement A).
- Measure diagonally from the other two corners. Write this number down (Measurement B).
- If Measurement A and Measurement B are the same, your room corner is square (90 degrees).
- If they are different, the wall is not square. Note the difference. This is crucial for accurate kitchen cabinet sizing, especially when installing long runs of cabinets.
Checking Wall Straightness:
Place your level against the wall. Check it vertically and horizontally. If the bubble is not centered, the wall bows in or out. Note the biggest deviation (e.g., “Wall 1 bows out by 1/2 inch in the center”).
Step 2: Measuring for Base Cabinets
Base cabinets sit on the floor. They support the countertops. This is often the first step in planning cabinet layout measurements.
Measuring the Total Run Length
Decide where the cabinets will run. This might be along one wall or around an “L” or “U” shape.
- Measure the length of the wall where the cabinets will sit. Measure from one end point to the other.
- Measure at the top, middle, and bottom of the wall. Use the shortest measurement. This is your maximum run length.
- Mark these spots clearly on your sketch.
Accounting for Obstructions and Open Space
You must subtract space for things that break up the cabinet line.
Common Obstructions:
- Doors and Windows: Measure the width of the opening. Also measure how far the opening is from the nearest corner.
- Vents or Outlets: Note the size and location of any floor vents or electrical outlets that might be in the way.
Calculating Space for Appliances
Appliances need dedicated spots. Measure these spots carefully.
- Dishwasher: Standard dishwashers are usually 24 inches wide. Measure the exact opening width if replacing an existing one.
- Range/Oven: Standard ranges are 30 inches wide. Measure the opening carefully.
- Refrigerator: If the fridge will fit between cabinets (a ‘built-in’ look), measure the required width, height, and depth for the appliance plus a little room for air circulation.
When measuring for base cabinets, always leave a little wiggle room (about 1/4 inch) on either side of a tall appliance space. This helps the appliance slide in easily.
Determining Base Cabinet Height
Standard base cabinet height is 34.5 inches. This is before adding the countertop.
- Measure the height from the floor to the top of the wall where the counter will sit.
- If your floor is uneven, measure at several points along the run. Use the shortest measurement for planning.
Determining Base Cabinet Depth
Standard base cabinet depth is 24 inches. This measurement is for the box itself.
- Measure from the wall to where you want the back of the cabinet box to sit.
- If you have an existing backsplash, measure from the face of the backsplash to the edge of the wall.
- Note if you are using a deeper countertop (e.g., 25 or 25.5 inches). The cabinet depth must support this.
This part is key to calculating kitchen cabinet space effectively.
Step 3: Measuring for Wall Cabinets (Upper Cabinets)
Wall cabinets hang above the base cabinets. Their height and placement are critical for safety and function. This section focuses on how to measure for upper cabinets.
Measuring the Wall Run Length
Measure the wall space directly above the base cabinets where the wall cabinets will go.
- Measure the exact length available.
- Remember that upper cabinets rarely go all the way to the corner or appliance opening. Leave space between the end of the cabinet run and the edge of a refrigerator or range hood enclosure.
Determining the Upper Cabinet Height
Height is often restricted by the ceiling or cabinets meeting a soffit (a dropped section of ceiling).
- Measure the height from the top of the base cabinets (or the intended countertop line) up to the ceiling or soffit.
- Subtract the standard countertop thickness (usually 1.5 inches).
- Subtract the intended gap between the countertop and the bottom of the upper cabinet. The standard gap is 18 inches, but this can change based on ceiling height or task lighting needs.
Example Calculation for Upper Cabinet Height:
- Ceiling Height: 96 inches
- Standard Base Cabinet Height (with no legs/toe kick): 34.5 inches
- Countertop Thickness: 1.5 inches
- Desired Gap: 18 inches
- Maximum Cabinet Box Height = 96″ – 18″ (Gap) – 1.5″ (Countertop) = 76.5 inches. (This is the space available for the cabinet box itself, which is not how upper cabinets are usually ordered, but helps visualize limits).
The key measurement is the distance from the countertop to the ceiling (minus the gap).
Determining Upper Cabinet Depth
Wall cabinets are typically shallower than base cabinets to keep the walkway clear.
- Standard depth is 12 inches.
- Measure the distance from the wall to the front edge of the base cabinet to ensure the upper cabinet doesn’t stick out too far past the countertop edge. Usually, the wall cabinet should be flush with the front of the base cabinet or slightly behind it, depending on your design choice.
Accounting for Cabinets Above the Refrigerator
This area often needs custom sizing.
- Measure the height from the top of the refrigerator to the ceiling.
- Measure the width available above the fridge.
- This space often requires a specific cabinet height to fill the gap perfectly.
Step 4: Measuring for Tall Cabinets (Pantry/Oven Cabinets)
Tall cabinets, like pantries or oven towers, run from floor to ceiling (or near ceiling).
- Width Measurement: Measure the space from the nearest obstruction (wall or existing cabinet) to the next obstruction.
- Height Measurement: Measure from the floor to the ceiling at the back of the space. Check the measurement at the front too, in case the ceiling slopes. Use the shortest height.
- Depth Measurement: Tall cabinets are usually 24 inches deep, matching the base cabinets. Check if the depth runs flush with the base cabinets or sticks out slightly.
When measuring existing kitchen cabinets that you plan to keep, measure their width, height, and depth exactly as they are now. This is important for integration.
Step 5: Accounting for Specific Kitchen Features
Your design might include specialized elements that require extra attention during measurement.
Toe Kicks and Legs
Base cabinets sit on legs or a built-in toe kick (the recessed area at the bottom).
- Standard toe kick height is 4 inches.
- Standard toe kick depth is 3 inches.
- When planning, ensure that the toe kick area doesn’t interfere with any floor vents or plumbing lines hidden behind the base cabinets.
Filler Strips
Fillers are thin pieces of wood used to bridge the gap between a cabinet and a wall, or between two cabinets that don’t perfectly match standard module sizes.
- If your measurement results in a 31-inch space, but your largest cabinet is 30 inches, you need a 1-inch filler strip beside the 30-inch cabinet.
- Always plan for a minimum 3-inch filler strip anywhere a cabinet meets a wall, especially on the hinge side of doors. This allows the door to swing open fully.
Island Measurements
If you are planning a kitchen island, measure the entire footprint needed.
- Overall Dimensions: Determine the desired length and width of the island top.
- Walkways: This is crucial for function. Ensure you have enough room to walk around the island comfortably.
- Minimum recommended walkway space between base cabinets/island and opposing cabinets/walls is 36 inches.
- For busy kitchens or where two people work, aim for 42 to 48 inches.
Tips for Success: Making Your Measurements Reliable
Getting reliable numbers is the goal of this entire exercise. Use these cabinet measuring tips to boost accuracy.
Double-Check Everything (The Rule of Three)
Measure every single dimension (length, height, depth) at least three times. If you get different results, measure again. Write down the shortest, most consistent measurement.
Measure from the Wall, Not the Old Cabinet
If you are removing old cabinets, measure the actual wall space. Old cabinets might not have been installed perfectly straight. Measure the bare wall dimensions.
Always Measure Walls at Multiple Points
Measure wall length at the top, middle, and bottom. If the difference is more than 1/4 inch, you must decide whether to shim the cabinets during installation or use filler strips to hide the gap. This is vital for accurate kitchen cabinet sizing.
Factor in Clearance for Doors and Drawers
Cabinet doors and drawers need space to open.
- A standard cabinet door needs about 1-2 inches of clear space in front of it to swing open without hitting an island or wall.
- Drawers need slightly less, but you still need clearance for the hardware pull.
Convert All Measurements to the Same Unit
Decide if you are working in inches or millimeters, and stick to it. Since most US cabinet makers use inches, converting everything to inches is usually easiest.
Creating a Simple Layout Sketch for Cabinet Ordering
Once you have all your numbers, sketch it out. This sketch helps you visualize the final product and confirm your determining kitchen cabinet dimensions.
Sketching the Base Cabinet Run
Draw a long rectangle representing the wall. Mark the locations of doors and windows.
| Section | Location (From Left Corner) | Required Width | Notes |
|---|---|---|---|
| Cabinet 1 | 0″ to 18″ | 18″ | Filler strip needed near window |
| Window Space | 18″ to 42″ | 24″ (No Cabinet) | N/A |
| Cabinet 2 | 42″ to 66″ | 24″ | Standard cabinet |
| Appliance Space | 66″ to 96″ | 30″ (Range) | Appliance specific opening |
| Total Measured Length | 96 Inches |
Sketching the Upper Cabinet Run
Repeat the process for the wall cabinets, paying close attention to the vertical gap height.
- If you are ordering cabinets in standard modular sizes (e.g., 12″, 15″, 18″, 21″, 24″, 30″, 36″), you need to fit those modules into your total measured length, plus fillers.
- Example: If your total base run is 94 inches, you might use a 36″ + 24″ + 30″ + 3″ Filler = 93 inches, leaving 1 inch for a final trim piece or another small filler.
This organized approach to calculating kitchen cabinet space ensures no space is wasted or miscalculated.
Measuring Existing Kitchen Cabinets for Replacement Projects
If you are replacing cabinets but keeping the layout, the process changes slightly.
Measuring the Existing Cabinet Boxes
- Width: Measure the face frame of the existing cabinet box from side to side. This is often the most important number for ordering replacements, as new cabinets usually fit into the existing footprint.
- Height: Measure from the floor to the top edge of the cabinet box (or countertop if the cabinet supports it).
- Depth: Measure from the wall to the front edge of the face frame.
Measuring Openings for Appliances
If you have a built-in oven or microwave, measure the opening size precisely. Cabinet manufacturers design replacement towers based on these rough openings.
- Measure the width, height, and depth of the actual opening.
- Check the diagonal measurements inside the opening as well, in case the opening is not perfectly square.
When measuring existing kitchen cabinets, remember that old cabinets may have settled or warped. Always use the smallest consistent measurement across several checks.
Comprehending Wall Imperfections and Cabinet Installation
Installation professionals will use shims to deal with imperfections noted during your initial measurements. However, knowing these issues beforehand helps you order the right size fillers.
Dealing with Out-of-Plumb Walls
“Out-of-plumb” means the wall is not perfectly vertical.
If a wall bows inward, the cabinet installer must use shims behind the back of the cabinet box to make it straight. This pushes the front of the cabinet slightly away from the wall. If the wall bows outward, the installer might need deeper filler pieces or adjustments to keep the face frames in a straight line.
Dealing with Uneven Floors
Uneven floors are very common. Base cabinets must be level, even if the floor is not. Installers use the cabinet legs or shims under the toe kick to level the cabinet structure. Your measurement for base cabinet height should reflect the lowest point on the floor to ensure you don’t have cabinets that end up too tall to accommodate a level line.
Final Review Before Ordering
Before sending your final measurements to the cabinet supplier, review this checklist:
- Have I measured the total run length (Wall A, Wall B, Island)?
- Have I noted all required appliance openings and their exact sizes?
- Have I accounted for necessary door swing clearance (usually 1.5 inches per side)?
- Have I noted where cabinets meet walls, and planned for filler strips (minimum 3 inches)?
- For upper cabinets, have I confirmed the 18-inch gap (or custom gap) height from the counter?
- Have I double-checked every measurement at least three times?
Getting these steps right moves you smoothly toward the installation phase. These detailed checks are the core of any successful kitchen cabinet measurement guide.
Frequently Asked Questions (FAQ)
What is the standard depth for kitchen cabinets?
The standard depth for base kitchen cabinets is 24 inches (not including the countertop overhang). Standard wall cabinets are typically 12 inches deep.
What is the standard space between the counter and upper cabinets?
The standard gap, or clearance, between the kitchen countertop and the bottom of the upper cabinets is 18 inches. This allows enough room to work comfortably.
Can I use standard cabinet sizes if my kitchen is oddly sized?
Yes, you can use standard cabinet sizes, but you will need to use filler strips or “scribe molding” to cover the gaps where the standard sizes don’t fit perfectly. This is why accurate planning cabinet layout measurements is key—it tells you exactly how much filler you need.
How do I measure for cabinets if my walls aren’t straight?
If your walls are not straight (out of plumb), you measure the straightest run possible, and then measure the maximum deviation (bow) at the center of the run. This deviation informs how much shimming or filler material the installers will need to use to keep the cabinet faces looking straight.
Do I need to subtract for the toe kick when measuring upper cabinets?
No. Toe kicks only apply to base cabinets that sit on the floor. Upper cabinets are mounted directly to the wall studs and do not have toe kicks.
What if my new countertop will be deeper than standard?
If you choose a deeper countertop (e.g., 25.5 inches), your base cabinet depth might need adjustment. Some cabinet lines offer deeper boxes (27 inches) to support the overhang better, or you may need to add deeper supports on the back of standard 24-inch cabinets. Always check with your supplier regarding support requirements for non-standard countertop depths.