Cabinets & Countertops: Calculators, Diagrams & Guides

3 calculators · 9 diagrams

Kitchens and baths are planned by the running foot: base cabinets in 3-inch width increments, wall cabinets over them, corner solutions that consume more length than they return, and countertops measured in square feet but priced and seamed by the slab. The three calculators in this hub turn a wall layout into a cabinet schedule — box counts, filler strips, toe kick, crown, and hardware — and a countertop takeoff with backsplash area, edge linear footage, and realistic seam placement.

The diagrams document the conventions the trade assumes you know: standard base (24 inches deep, 34½ high) and wall cabinet dimensions, the corner-cabinet decision between a lazy susan, blind corner, and diagonal unit, countertop overhang limits and where unsupported stone needs corbels, and the seam-placement logic that keeps countertop joints away from sink cutouts, cooktops, and the high-visibility runs guests see first.

Dimensional standards follow KCMA conventions and the NKBA planning guidelines that kitchen designers work from — landing areas, work-aisle widths, and the 25-inch countertop depth over a 24-inch base. Both room composers (kitchen and bathroom) call these same calculators under the hood, so a hub-level estimate and a whole-room remodel plan always agree with each other. Every tool is free with no signup.

Cabinets & Countertops calculators

Cabinets & Countertops · 9 diagrams

Frequently Asked Questions

How do I measure my kitchen for cabinets in linear feet?

Run a tape along each wall that will carry cabinets, at counter height, wall to wall — then subtract appliance widths (range, dishwasher, fridge) and note window positions. Corners count once, along the longer wall. The kitchen cabinets calculator converts the runs into a box-by-box schedule with fillers and panels included.

What are standard cabinet dimensions?

Base cabinets: 24 inches deep, 34½ tall (36 with the countertop), in widths from 9 to 48 in 3-inch steps. Wall cabinets: 12 inches deep as the default, 30, 36, or 42 tall depending on ceiling height and whether crown fills to the ceiling. Vanities drop to 21 inches deep and 30 to 36 tall — the bathroom calculator uses its own dimension set.

How much overhang can a countertop have without support?

The working limits for 3 cm stone: about 10 inches unsupported for granite and most quartz, 6 for marble — beyond that you add corbels, steel, or a thicker build-up. Standard front overhang is 1½ inches; seating overhangs run 12 to 15, which nearly always means visible or hidden support. The countertop calculator flags spans that exceed the limit.

Where should countertop seams go?

Away from sink and cooktop cutouts (the narrow webs crack), out of the main sightline from the room entry, and ideally over a cabinet partition where the joint gets full support. Slab size drives seam count — most quartz slabs run about 120 by 55 inches, so an L-shaped kitchen usually needs at least one. The takeoff diagrams in this hub show the standard placements.

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