How to Measure Your Sofa for Delivery: The Complete Guide

How to Measure Your Sofa for Delivery: The Complete Guide

One of the most common sofa-buying mistakes is falling in love with a sofa online, ordering it, and discovering on delivery day that it won't fit through the front door, up the staircase, or around the corner landing. This is entirely avoidable with proper measuring. This guide explains exactly what to measure, how to measure it, and what to do when the numbers are borderline.

Step 1: Measure the sofa itself

Before you measure your home, know the sofa's dimensions. Every sofa should list at minimum: overall width (W), overall depth (D), overall height (H), and — critically for delivery — the diagonal depth (DD). The diagonal depth is the measurement from the front bottom edge to the rear top edge of the sofa in a straight diagonal line. This is the measurement that determines whether a sofa can be tilted to fit through a doorway. Many retailers omit it. If it's missing, contact the retailer and ask specifically for the diagonal depth before ordering.

Step 2: Measure your front door

Measure the clear opening width of your front door — that is, the distance between the door frame when the door is open, not the door itself. Standard UK/EU doors range from 76cm to 92cm clear opening. Also measure the height of the door opening. Remember to account for any step at the entrance, door thresholds, or letterbox protrusions that might reduce the effective clearance.

Step 3: Measure your hallway

The hallway is often the hardest obstacle. Measure the width at its narrowest point (including any radiators, coat hooks, or built-in units that protrude into the space). Also measure the length of the hallway before any corner or turn. If the sofa is longer than the hallway is wide when tilted, you may have a problem — this is where the sofa's diagonal depth becomes critical. A skilled delivery team can tilt a sofa on its end and rotate it through surprisingly tight spaces, but only if the diagonal depth clears the hallway ceiling.

Step 4: Measure staircases and landings

For upstairs deliveries, measure the staircase width (the clear walking width between banisters or walls). Measure the height from the staircase floor to the ceiling above — this clearance is needed for tilting the sofa vertically. Also measure any landing turns: the width of the landing and the height of the ceiling above the landing. Tight spiral staircases or dog-leg turns with low ceilings are the most challenging scenarios.

Step 5: Measure internal doorways

Internal doorways are often narrower than front doors. Remove any door stops, hinges that protrude into the opening, and account for any step between rooms. Measure clear width and clear height for every doorway the sofa must pass through.

The diagonal measurement trick

Here is the key formula delivery professionals use. If a sofa's height (H) and depth (D) won't fit through a doorway, the sofa can often be tilted diagonally. The diagonal depth (DD) can be calculated as: DD = square root of (H squared + D squared). If DD is less than the door height, the sofa can be tilted through. If DD is greater than the door height, it may not — though removing door frames or hinges can gain 2-5cm of clearance.

When the numbers are borderline

If your measurements are within 5cm of the sofa's dimensions, take these steps before cancelling: remove the door from its hinges (gains 2-5cm); remove any door threshold strips; check whether the sofa has removable legs (gains 8-15cm of height clearance); ask the retailer whether the sofa back can be detached (some modular and some high-end sofas allow this). If all else fails, professional sofa delivery teams sometimes have specialised equipment including shoulder dollies and furniture sliders that allow sofas to be moved through tighter spaces than you might expect.

A room-by-room measurement checklist

Before ordering: note the sofa's W, D, H, and diagonal depth. Measure and note: front door clear width and height; hallway width at narrowest; hallway height; any staircase width, height clearance, and landing dimensions; all internal doorway widths and heights. Add 5cm buffer to all dimensions to account for manoeuvring. If all measurements exceed the sofa's dimensions with buffer, you're safe to order.