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The Storage Fit Guide

Measuring guide

How to measure an under-sink cupboard

The useful measurement is not the outside cupboard size. It is the clear internal space left after hinges, waste pipes, shelves and door movement.

Measure usable width

Measure inside the cupboard, then subtract hinges, door stops and any side pipework.

Check depth at shelf level

Rear waste pipes and traps often steal depth where pull-out drawers need it most.

Allow working clearance

Leave at least 2cm around fixed organisers and more for drawers, lids and removable baskets.

1. Measure the internal width

Measure wall-to-wall inside the cupboard, then note anything that reduces usable width: hinges, door stops, water valves, side pipes or a centre stile between double doors.

2. Measure depth where the organiser will sit

A cupboard can look deep at the base but lose space at shelf height because of a trap or rear waste pipe. Measure at the exact height where the product will slide or sit.

3. Map the pipe position

Mark whether the main obstruction is left, right, centre or rear. Centre pipes often suit expandable shelves better than solid pull-out drawers.

4. Check door clearance

Pull-out drawers need the door to open wider than the drawer front. Measure the clear opening, not the cabinet carcass.

Open the under-sink finder

FAQ

Should I remove everything before measuring?

Yes. Empty the cupboard and measure around fixed pipework. Bottles and cleaning caddies can hide the real obstructions.

How much spare space should I leave?

Leave at least 2cm around a fixed organiser. For pull-out drawers, allow extra room for the drawer path and your hand.

Last updated: 22 May 2026