Butcher Block Countertop Sizes — and How to Cut Your Kitchen From Them

Off-the-shelf butcher block countertops are 25" deep and 1½" thick, in lengths of roughly 50" (4 ft), 74" (6 ft), 98" (8 ft), and up to 120" (10 ft) depending on retailer. IKEA's Karlby runs 74" or 98" × 25⅝", with an island version at 74" × 42". Your kitchen almost never matches those numbers — so the real question is which blanks to buy and where to cut them. This page lists the standard sizes, then turns your runs into a cut plan with a free optimizer.

Standard butcher block sizes by retailer

What's actually on the shelf (confirm the exact SKU before you drive — species and finish vary by store):

Home Depot (Hampton Bay, Hardwood Reflections): 25" deep × 1½" thick, in 50", 74", and 98" lengths; island blanks around 39" deep
Lowe's (allen+roth and others): 25" deep × 1½" thick, in 6-ft, 8-ft, and 10-ft (120") lengths
IKEA Karlby: 25⅝" deep × 1½" thick, in 74" and 98" lengths; kitchen-island version 74" × 42"

Two dimensions matter more than they look. The 25" depth is designed for standard 24"-deep base cabinets plus about an inch of overhang — you rarely cut depth at all. And 1½" thickness means a full-length seam is glue-and-bolt joinery, not something to improvise — which is why seam placement is a planning decision, not a jobsite decision.

Why counter layout is a cutting problem

Since depth is fixed, laying out a kitchen is mostly about packing run lengths onto blank lengths — the same math as any cut list, with three counter-specific rules:

Grain runs lengthwise. You can't rip a 98" blank into two 25"-deep runs; one blank yields one run of counter (plus end offcuts). Islands deeper than 25" need an island blank
Seams go where they're hidden and supported — at the sink cutout or over a cabinet partition, never floating mid-span or at the dishwasher opening
Every end cut is finished surface. A clean plan minimizes cuts, not just waste

The failure mode this prevents: buying two 74" blanks for a 132" run, then discovering the seam lands exactly over the dishwasher. Plan the cuts before the buy.

Worked example: an L-kitchen plus island

Say the kitchen needs:

Long run: 121" × 25"
Short run: 58" × 25"
Island: 74" × 39"

The island answers itself: one island blank (Karlby 74 × 42, trimmed to 39, or a 39"-deep big-box island blank). The runs are the puzzle. Options for the 121": a 10-ft Lowe's blank (one seamless run, 1" of end trim... nearly zero waste) — or a 98" + a piece off a 74", with the seam placed at the sink. The 58" short run comes out of a 74" blank with a 16" offcut, or shares the 74" with the long run's 23" seam piece — 58 + 23 fits a 74" blank with a whisker to spare, saving an entire blank.

That last option — noticing that two pieces share one blank — is exactly what the optimizer finds automatically. Enter your runs as parts and the blank sizes as stock, and it reports which blanks to buy and what comes off each one, with offcuts listed.

Lay out your counters on the free optimizer

The Karlby desk cut, while we're here

The most common butcher block cut isn't a kitchen at all — it's the Karlby desk. The standard plays:

One 74" × 25⅝" used whole: a generous single desk, zero cuts
One 98" blank cut in half: two 49" desks — one cut, two workstations
An L-desk: a 98" main plus a 74" return, cut to taste

Same planning rule as kitchens: put the cut ends where they're least visible (against a wall), and remember the ⅛" the saw eats — two "49-inch halves" of a 98" blank are really 48 15/16" each. If you're cutting several desks for an office from a stack of blanks, that's a genuine nesting run — the optimizer will pack it.

Cutting butcher block cleanly

The optimizer decides where to cut; a few notes on the cuts themselves:

A circular saw against a straightedge (or track saw) crosscuts a 25" blank cleanly — use a sharp fine-tooth blade, tape the cut line, cut with the show face down
Budget a ⅛" kerf per cut and tell the optimizer about it
Seal every fresh cut — end grain drinks water, and the cut ends near sinks and dishwashers are where blocks fail
Sink cutouts come out of the middle of a run, so they don't change the blank count — but the cutout offcut is a free cutting board

For grain-direction background, see what grain direction means for cut layout.

Related guides

Frequently asked questions

What sizes do butcher block countertops come in?

Standard blanks are 25" deep and 1½" thick, in lengths of about 50", 74", 98", and — at some retailers — 120" (10 ft). IKEA Karlby is 25⅝" deep in 74" and 98" lengths. Island blanks run deeper: roughly 39" at big-box stores, 42" for Karlby's island version.

What are the IKEA Karlby dimensions?

Karlby countertops are 74" or 98" long × 25⅝" deep × 1½" thick, in oak, birch, and walnut veneer over particleboard. The kitchen-island version is 74" × 42" × 1½". Because it's a veneered panel rather than solid staves, cut edges must be re-covered or hidden — plan cuts so factory edges face out.

Why are butcher block counters 25 inches deep?

Standard base cabinets are 24" deep; a 25" top gives about an inch of overhang past the door faces. That's why depth cuts are rare — layout is really about packing run lengths onto blank lengths, which is what a cut optimizer does.

Can I seam two blanks for a long run?

Yes — runs longer than the longest blank are joined with glue and countertop bolts from below. Put the seam where it's supported and inconspicuous: over a cabinet partition or at the sink cutout, never over an open appliance bay. Deciding seam position before buying blanks is the main reason to plan the layout first.

Can I rip one blank into two narrower counters?

Usually no for kitchens — the blank is 25" deep and so is your counter, and staves run lengthwise. Ripping does work for floating shelves, benches, or narrow desks cut from one blank; enter the blank as stock in sheet mode and the optimizer will nest the narrow parts onto it.

How do I figure out how many blanks to buy?

List every run and island as a part (length × depth), enter the available blank sizes as stock, and run the optimizer. It packs runs onto blanks — including spotting when two short pieces share one blank — and reports the shopping list plus the offcut from each blank. It's free and runs in your browser.

Plan your butcher block cuts before you buy the blanks