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What size should a QR code be in relation to scan distance?

Updated: Apr 25

qr code size

In a society that is growing more reliant on contactless interaction, QR codes are quickly becoming the standard. The data on QR codes support this.

QR codes, on the other hand, are only as good as they are dependable. Everyone is out of luck if a QR code does not scan. So, here's some information on the minimum size of a QR code. This is crucial information if you're making your own QR code. (However, bear in mind the disadvantages of utilizing a free online QR code generator, and learn how to pick the best QR code generator.)

The difference between a successful rollout of an exceptionally handy touchless technology and failure is the minimum size of your QR code. Remember that there are several varieties of QR codes, so select cautiously. ( qr code size )

A 10:1 distance-to-size ratio was used while designing QR codes. That implies a QR code scanner should be 10 times the width of the QR code to be effective.

To put it another way, if a QR code is two inches wide, scan it from a distance of twenty feet.

Scan using this QR code distance to size ratio in mind when doing a QR code test to make sure your QR code works.

Minimum Size for QR Codes

A QR code must be at least 2 x 2 cm (0.8 x 0.8 inch) in size. QR codes may be smaller than 2 by 2 cm since there is no specified size. However, a QR code should be at least 2 centimeters wide by 2 cm long to be scanned by the majority of today's devices.

And, in most cases, you'll need a QR code that's bigger than the minimum to participate in QR code marketing and QR code tracking effectively.

What is the minimum size requirement for a QR code?

In general, we know that a QR code should be at least 2 by 2 cm. However, it's possible that this isn't the most appropriate size for your needs. Here's how to figure out what size your QR code should be at its smallest.

Distance Measured

The majority of the time, the size of your QR code is determined by scanning distance. A 10:1 distance-to-size ratio is required for a QR code, as you are aware. So consider where you'll put your QR code and what physical limitations it may impose on those scanning it. Based on the physical surroundings, the key is estimating the natural, comfortable scanning distance.

Consider the case of a restaurant. People will likely scan a QR code menu or QR-based digital wine list from a few inches away if it is placed face-up on a table. They won't automatically raise their phone off the table. Place a digital menu QR code template or a QR code on the table or the wall of a 4-6 person booth, on the other hand, and it will need to be larger to accommodate everyone.

The size of the data

The size of your QR code is often determined by the quantity of data you have. Especially when there's a lot of data to print and you're trying to do it at a reduced resolution.

The QR code now comes in 40 different variations. The first version had a width of 21 data modules and a height of 21 data modules. QR codes include data modules, which are little black and white squares. The second version has a 25 by 25 grid. Up to version 40, which is 177 by 177 pixels. Each version has more data than the one before it. For additional information on the components of a QR code, see our How Do QR Codes Work? topic.

The version utilized while creating a QR code is determined by the number of characters (also known as data) you encode. One of the most distinguishing features of the QR code over the barcode is that it can be anything. The QR code includes more rows and columns as the number of information increases.

Let's pretend you're making a QR code for a digital menu that's available at this URL: That's a total of 37 letters and numbers. Version 3 QR codes with 29 x 29 data modules would be required. There isn't enough information here to justify deviating from the standard QR code distance-to-size ratio of 10:1. More information about QR code variations may be found here.

More complicated QR codes, on the other hand, maybe made bigger to guarantee scannability. See the section below about the "Minimum QR Code Print Size."

What Can I Do If My QR Code Is Too Big?

You may perform one of three things to lower the size of your QR code. Reduce the number of characters, reduce the amount of mistake correction, and, if applicable, eliminate a primary image.

Scan times may be slowed by large QR codes. QR codes are kept loyal to their name by decreasing their size. After all, "rapid response code" is the definition of a QR code.

Cut the Number of Characters

As we've seen, a QR code may be made smaller by having fewer rows and columns. You may reduce the character count by utilizing a shorter version of the URL if you switched from URL to QR code. That way, you may utilize a lower-resolution QR code and safely reduce the QR code's size.

Fixing Errors

QR code error correction has four layers. Level H is the highest level, and it retains enough backup data to keep QR codes functioning even if they are damaged by up to 30%. Fewer data modules are used for storage when a lower degree of error correction is used. Furthermore, the QR code's size may be securely reduced.

Remove the image from the center

There's a center picture or logo in many bespoke QR codes. You may exclude extra aesthetic features like that if you're aiming to make a very compact QR code. Within the data grid, whatever space you can clear is precious real estate.

QR Code Printing Size Minimum

The real minimum size for scanning ISO 18004-compliant QR codes is 10 mm, which is about 1 cm or 0.4". However, as we previously said, many current smartphones need at least double that amount in order to scan properly. When printing or inserting your QR code, keep it to a minimum of two centimeters and a distance-to-size ratio of 10:1.

Unless your QR code is exceedingly complicated and you don't have access to high-resolution photos to print.

If you don't have high-resolution printing capabilities, here's a rule of thumb for QR code minimum sizes for huge, complex QR codes. To assure a 12" scan distance, raise the size of your QR code by.2" for every 5 rows and columns.

However, when placing the QR code, you will need to account for this increase in size. However, in the absence of high-resolution printing, this criterion assures that even the most complicated codes can be read.

The table below shows the best scanning distance for each QR code variant. As you can see, every 5 modules improve the scanning distance by.2".

For a business card, what size QR code should be used?

For business cards, 0.8 x 0.8" is the optimal QR code side. It isn't the end of the world if you just utilize 1 square inch. The optimal scanning distance is just slightly increased. This is based on a 9 x 5 cm or 3.5 x 2" standard business card.

Requirements for QR Code Resolution

The resolution of a QR code should be at least 76 × 76 pixels, or 2 x 2 centimeters. Because 1 centimeter equals around 38 pixels, and the smallest QR code size is 2 x 2 cm, this is the case.

1 inch is roughly 96 pixels by imperial standards.

What are a Micro QR Code's Dimensions?

A tiny QR code is one square centimeter or less in size. Denso Wave (the same company that invented QR codes) created Micro QR codes as a smaller, more compact variant. Micro QR codes range in size from 11 × 11 modules to 17 x 17. 21 x 21 modules are the smallest QR code.

So, how small can you make a QR code?

The smallest QR code size is 1 x 1 cm, while micro QR codes are much smaller. However, this isn't advised.

To be scanned by the majority of contemporary smartphones and QR code scanner software, a QR code must be at least 2 by 2 cm in size. The optimum size of a QR code, on the other hand, is determined by the scanning distance and the quantity of data it contains.

A distance-to-size ratio of ten to one will usually be enough. If you follow that guideline, you'll be alright 90% of the time. However, there are exceptions. When there's a lot of information in a QR code and high-resolution printing isn't an option. Use the.2" per five modules rule in such a situation.

If you're a restaurant using QR codes to replace single-use menus, all you'll be encoding is a URL. Large, complicated static QR codes won't be an issue.

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