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Generated on: July 20, 2026 at 09:33 PM

Closet Shelf Spacing Calculator

Inputs

Opening height200 cm
Number of shelves4
Shelf thickness1.8 cm

This spreads the shelves evenly across the opening; it does not size the shelf material or its supports for load. Heavy loads need thicker boards, shorter spans, or extra brackets to avoid sagging. Measure the actual opening, and account for any base, kick, or trim that reduces the usable height.

Generated with OneCalc · https://onecalc.app/en/lifestyle/closet-shelf-spacing

Lifestyle

Closet Shelf Spacing Calculator

Divide a closet or cabinet opening into evenly spaced shelves. Enter the opening height, the number of shelves, and the shelf thickness to get the gap between them.

Inputs

≥ 0.1 cm
1 – 50

Results

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Details

4 shelves in a 200 cm opening leave a ... gap between each, or ... on centre.

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Closet Shelf Spacing

Fitting a stack of shelves into a closet or cabinet means dividing the opening into equal gaps. The trick is that N shelves create N+1 gaps — one below the first shelf, one between each pair, and one above the last — so the clear space is split into N+1 parts. This calculator finds the even gap and the on-centre spacing for marking the wall.

Splitting the opening

First the thickness taken up by the shelves themselves is removed from the opening height to leave the clear space for the gaps:

S=H−n t\begin{aligned} S &= H - n \, t \end{aligned}

That clear space is divided into N+1 equal gaps:

g=Sn+1\begin{aligned} g &= \frac{S}{n + 1} \end{aligned}

For laying out, the on-centre spacing from the top of one shelf to the top of the next is the gap plus one shelf thickness:

c=g+t\begin{aligned} c &= g + t \end{aligned}

Worked example

Consider a 200 cm opening fitted with 4 shelves, each 1.8 cm thick:

S=200−4×1.8=192.8g=192.85=38.6c=38.6+1.8=40.4\begin{aligned} S &= 200 - 4 \times 1.8 = 192.8 \\ g &= \frac{192.8}{5} = 38.6 \\ c &= 38.6 + 1.8 = 40.4 \end{aligned}

So each gap is about 38.6 cm, and the shelves sit about 40.4 cm on centre.

Consider an 80 in opening fitted with 4 shelves, each 0.75 in thick:

S=80−4×0.75=77g=775=15.4c=15.4+0.75=16.15\begin{aligned} S &= 80 - 4 \times 0.75 = 77 \\ g &= \frac{77}{5} = 15.4 \\ c &= 15.4 + 0.75 = 16.15 \end{aligned}

So each gap is about 15.4 in, and the shelves sit about 16.2 in on centre.

Choosing inputs

Even spacing is the starting point; the right gap depends on what the shelves hold, from about 30 cm (12 in) for folded clothes and shoes to 45 cm (18 in) for tall bottles. If a few items are taller, set those gaps by hand and let the calculator space the rest evenly. Measure the true opening and subtract any base, kick, or trim that eats into the usable height, and keep the top shelf within comfortable reach.

For hanging artwork at the right height nearby, see Picture Hanging Height Calculator.

Frequently Asked Questions (FAQ)

How far apart should closet shelves be?

It depends on what they hold. Folded clothes and shoes suit a gap of about 30–40 cm (12–16 in), pantry shelves for tall bottles want 35–45 cm (14–18 in), and a single linen shelf can be deeper. This calculator spreads the shelves evenly; if some items are taller, set those gaps by hand and use even spacing for the rest.

How do I space shelves evenly?

Subtract the combined thickness of all the shelves from the opening height to get the clear space, then divide by the number of shelves plus one, because N shelves create N+1 gaps — below the first shelf, between each pair, and above the last. The result is the equal gap, and adding one shelf thickness gives the on-centre spacing for marking the wall.

What is a good height for the top shelf?

A comfortable reach for most people tops out around 1.8 m (about 72 in), so a single high shelf is often set near there with a hanging rod below. For a stack of evenly spaced shelves, keeping the top one within easy reach and the heaviest items at waist height makes the closet easier to use. Adjust the count so no gap ends up too tight.

Disclaimer

This spreads the shelves evenly across the opening; it does not size the shelf material or its supports for load. Heavy loads need thicker boards, shorter spans, or extra brackets to avoid sagging. Measure the actual opening, and account for any base, kick, or trim that reduces the usable height.

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