How to Measure a Corner Sofa for a Cover: The Complete Guide

To measure a corner sofa for a cover, you need to measure each individual section of the sofa separately — the seat, the back, the arms, and the chaise or return — then add these figures together to calculate the total fabric required. A standard corner sofa typically requires between 12 and 20 metres of fabric depending on its size, configuration, and whether the fabric has a pattern repeat.

This guide walks through every measurement you need, how to calculate fabric quantity, and what to consider when measuring a rattan corner sofa cover.

What You'll Need

• A steel tape measure
• Pen and paper, or a notes app
• The sofa's configuration in mind — L-shape, chaise, or U-shape
• Note of any pattern repeat on your chosen fabric (this affects total meterage)

How Sofa Cover Measurement Works

Unlike measuring a corner sofa for a room, measuring for a cover requires you to treat the sofa as a series of individual panels. Each surface that will be covered — seats, backs, arms, base — needs its own measurement.

The total fabric needed is calculated by adding up the area of every panel, then adding a seam allowance of at least 2–3cm per edge, plus extra for any tuck-in sections and pattern matching if relevant.

Step-by-Step: How to Measure a Corner Sofa for a Cover

Step 1: Measure the Seat Cushions

Measure each seat cushion individually:

1. Width — from one side of the cushion to the other
2. Depth — from the front edge to the back
3. Height — the thickness of the cushion

Multiply the number of identical cushions to avoid re-measuring, but note that corner sofas often have differently sized cushions on the main run versus the return section.

Step 2: Measure the Back Cushions or Back Panel

If your sofa has loose back cushions, measure each one as you did the seat cushions — width, depth, and height. If it has a fixed back panel, measure:

1. Total width of the back along the longest side
2. Total width of the back along the return side
3. Height of the back from the seat platform to the top of the sofa

For an L-shaped corner sofa, you'll have two back sections to measure separately.

Step 3: Measure the Arms

Most corner sofas have two outer arms. Measure each one:

1. Width — the thickness of the arm from front to back
2. Height — from the seat platform to the top of the arm
3. Depth — how far the arm extends from the back of the sofa to the front

Step 4: Measure the Chaise or Return Section

The chaise or return is one of the most important sections to get right, as it's often the largest single panel on the sofa.

1. Length — the full length of the chaise from the corner join to the end
2. Depth — from the front edge to the back
3. Height of the back — if the chaise has a back rest, measure its height separately

Step 5: Measure the Base and Skirt (If Applicable)

If you're covering the base of the sofa or adding a skirt:

1. Measure the perimeter of the sofa base — run the tape measure along the front and sides
2. Note the drop height — from the bottom of the sofa frame to the floor

Step 6: Add Seam Allowance and Tuck-In

Once you have all your panel measurements, add the following to each piece:

• 2–3cm seam allowance on every edge that will be sewn
• 10–15cm tuck-in allowance for any sections that tuck into the sofa seat or back crevices
• Pattern repeat allowance — if your fabric has a repeat, add one full repeat length per panel to ensure alignment

How Much Fabric Do You Need for a Corner Sofa Cover?

The amount of fabric needed for a corner sofa cover depends on the sofa's size, the number of cushions, and whether the fabric is plain or patterned.

These figures assume a standard fabric width of 140cm. If your fabric is narrower — 110–120cm is common in some upholstery ranges — increase the total meterage by approximately 20%.

Always buy slightly more than your calculations suggest. An extra metre or two allows for mistakes, directional fabric, and any future repairs.

How to Measure a Rattan Corner Sofa for a Cover

Measuring a rattan corner sofa for a cover follows the same principles as a standard upholstered sofa, but with a few important differences.

Rattan corner sofas typically have removable cushion pads rather than integrated upholstery, which means you're usually measuring for cushion covers rather than a full sofa cover.

Measuring Rattan Corner Sofa Cushions

For each cushion pad:

1. Measure the width from edge to edge across the widest point
2. Measure the depth from front to back
3. Measure the thickness — rattan cushions are often thicker than standard sofa cushions, commonly 8–12cm

Because rattan frames vary considerably in shape — some have curved edges, angled backs, or tapered seats — always measure each cushion individually rather than assuming they're identical. Even cushions that look the same on opposite sides of a rattan L-shape can differ by several centimetres.

Covering the Rattan Frame Itself

If you want to cover the rattan frame rather than just the cushions — for weatherproofing or aesthetic reasons — treat the frame as a series of flat panels:

1. Measure the full outer width and depth of the sofa as a footprint
2. Measure the height from the ground to the top of the back
3. Add 15–20cm of excess on all sides for securing the cover underneath the frame

For a fitted weatherproof cover, these dimensions will be passed directly to the cover manufacturer rather than used to calculate fabric yardage.

How Many Metres of Fabric to Reupholster a Corner Sofa?

Reupholstering is a more involved process than fitting a cover, and requires more fabric because every surface is stripped back and re-covered individually — including areas not visible in everyday use.

As a general guide:

For reupholstery, always consult a professional upholsterer before purchasing fabric. They will measure the sofa themselves and give you a precise figure based on the specific construction of your piece. Buying fabric before getting a professional assessment is one of the most common — and costly — mistakes in the reupholstery process.

Frequently Asked Questions

How do I measure a corner sofa for a cover?

Measure each section of the sofa separately — seat cushions, back cushions or back panel, arms, chaise or return, and base. Add a 2–3cm seam allowance to each panel edge, plus a 10–15cm tuck-in allowance where needed. Total all measurements to calculate how much fabric you need.

How much fabric do I need for a corner sofa cover?

A small corner sofa typically requires 12–14 metres of plain fabric. A medium corner sofa needs 14–17 metres, and a large corner sofa 17–20 metres. Add 20–25% for patterned fabric to allow for pattern matching across panels.

How do I measure a rattan corner sofa cover?

Measure each cushion pad individually — width, depth, and thickness — as rattan sofa cushions often vary in size across the same sofa. For a full frame cover, measure the outer width, depth, and height of the sofa and add 15–20cm excess on all sides for securing underneath.

How many metres of fabric do I need to reupholster a corner sofa?

Reupholstering a medium corner sofa typically requires 18–22 metres of fabric. Larger sofas and U-shapes can require 28–35 metres. Always get a professional upholsterer to measure and advise before purchasing fabric.

Does a pattern repeat affect how much fabric I need?

Yes — a pattern repeat means each panel needs to be cut at the same point in the repeat to ensure alignment across the sofa. Add one full pattern repeat length per panel to your total fabric calculation. The larger the repeat, the more additional fabric you'll need.

Thinking About a New Corner Sofa Instead?

Sometimes the most practical solution is a fresh start. If your current sofa is beyond covering or reupholstering, browse full corner sofa collection to find your next piece — available in grey, beige, cream, and black.

Before you buy, make sure you've got the sizing right — our guide on how to measure a corner sofa covers everything from room dimensions to doorway access. And if you're unsure which size to go for, how big is a corner sofa breaks down standard dimensions by configuration and room size.

Exploring your options? Read our guide to corner sofa types explained or browse the best corner sofas for 2026 for curated recommendations across every style and budget.