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Sock Size Calculator

Created by Steven Wooding
Reviewed by Dominik Czernia, PhD and Jack Bowater
Last updated: May 20, 2024

If you are not sure what size socks you or your child needs, then this handy sock size calculator is for you. We've looked at sock size charts and sock size conversions from shoe size to created this sock size calculator - guaranteed to make buying your next pair of socks as simple as possible.

Below we cover men's sock sizes, women's sock sizes, along with kids sock sizes. We calculate sizes of socks by shoe size and children's sock sizes by age. So come on - pull your socks up and start calculating your sock size.

Be sure to check out our shoelace calculator with some cool shoelace patterns or the belt size calculator to find out what size belt to buy based on your measurements.

What are socks?

Socks are a clothing item that you put on your feet to make shoes more comfortable to wear and to help keep your feet warm in cold weather. As we know them today, machine-knitted socks were first produced in the late 16th century, though a pair of hand-knitted socks from 300-500 AD was found in Egypt (pictured below). Another function of socks is to absorb sweat, which allows it to reach the air and evaporate.

Early pair of socks from 300-500 AD
An early form of sock made in Egypt around 300-500 AD. (Credit: David Jackson / CC BY-SA 2.0 UK)

💡 The word sock comes from the Old English word socc, which means "light slipper". Socc comes from the Latin word soccus, meaning a "light, low-heeled shoe", which in turn comes from the ancient Greek work sykchos.

Socks have a nasty habit of getting lost. Find out where they might be hiding and how many you've lost over the years with our lost sock calculator.

How to use this sock size calculator??

Using this sock size calculator to find out "what size of socks do I wear?" is really simple. First, select whether you're looking to size socks for an adult or a child. For adults:

  1. Select whether the socks are for a man or a woman. In the US, there is a slight difference in the shoe size system for each gender.
  2. Enter your shoe size in either the US, UK/AU, or EU shoe size system, depending on your preference.
  3. We will then display your sock size result in US sock size and general sock size (small, medium, or large).

If you wonder how to calculate sock size for children:

  1. Choose whether you want to use the age or shoe size of the child to size their socks.
  2. To size socks by age, enter their age in either months or years, up to 11 years old.
  3. For shoe size, enter their shoe size, either the US, UK/AU, or EU shoe size system.
  4. We will then display your child's sock size in US sock size and size name.

US sock sizes - what size of socks do I wear?

US sock sizes mustn't be confused with US shoe sizes. Sock sizes in the US are based entirely on the length of the foot in inches, while US shoe size is defined as three times the foot's length in inches, minus 22 for men and 21 for women. You can learn more about shoe sizes by taking a look at our shoe size conversion calculator. Here, we will focus on how to calculate sock size based on children's, men's, and women's sock size charts.

So, if you're in the US, simply measure your foot length to the nearest inch (go up to the next inch) to get your US sock size. As we mentioned, this method will work for men, women, and children. So that's how to calculate sock size in the US. Easy, right?

Socks in the US are generally offered in three sizes:

  • 9-11 US sock size - small
  • 10-13 US sock size - medium
  • 14+ US sock size - large

Specialist socks, such as compression socks or tailored socks, might be offered in single US sock sizes. If you still aren't sure "What size of socks do I wear?", check it with our sock size calculator!

Men's sock sizes

Man wearing socks
(Credit: Photo by Dimitri Houtteman on Unsplash)

If you don't know the length of your foot in inches and don't have a tape measure handy, you can always convert from shoe size to US sock size. Our sock size calculator is also a sock size conversion tool that tells you your general sock size - small, medium, or large. This way of sizing socks is commonly used outside the US.

Here is the US sock size chart for men that this calculator uses (we also show UK and EU shoe sizes):

US sock size

General sock size

US men's shoe size

UK men's shoe size

EU men's shoe size
















💡 The UK and Australia use the same shoe size system.

Women's sock sizes

Woman wearing socks
(Credit: Photo by CoWomen on Unsplash)

There is a slight shoe size difference for women's socks compared to men, which you can see in the chart below. If you wear a shoe size 10 or greater, you might also consider men's socks, as there isn't much practical difference and you'd get to choose from more patterns and styles.

Here is the US sock size chart (also for the UK and EU) for women that this sock size conversion device uses:

US sock size

General sock size

US women's shoe size

UK women's shoe size

EU women's shoe size
















Kids socks sizes. Children's sock sizes by age

Baby socks on washing line
(Credit: Photo by Christian Fickinger on Unsplash)

There is no agreed standard when it comes to kid's sock sizes. Sometimes they are sold by age, shoe size or in descriptive sizes (e.g. toddler). Always double check the sizing guide of the store or sock manufacture to see what system they use. Our calculator allows you to input the age of the child or get the sizing of kids socks by shoe size (for US, UK and EU shoe size systems). We used the following US sock size chart, as well as for the EU and UK, as a guide for this calculator:

Size name

US sock size

US shoe size

UK shoe size

EU shoe size

Typical age






1-3 mos






3-12 mos






1-2 yrs






2-3 yrs






3-7 yrs






7-10 yrs

From newborn babies to 10-year-old children, we've got it covered. Remember, though, when it comes to children's sock sizes by age, some kids grow at different rates, so you might need a size above or below the recommended one. That's why measuring your child's feet might be a better idea to get the right size socks the first time.

As you can see from the chart above, once your child gets close to 10 years old, you probably want to start looking at small adult size socks. They also might appreciate more grown-up sock designs and patterns.

Steven Wooding
Related calculators
Adult or child?
Man or woman?
Shoe size
US shoe size (4-15.5)
UK/AU shoe size (3-14.5)
EU shoe size (35-52)
Sock size
US sock size
General sock size
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