UK to US Shoe Size Converter

Created by Aleksandra Zając, MD
Reviewed by Steven Wooding
Last updated: Oct 12, 2022

Converting shoe sizes has never been easy as our UK to US shoe size converter. Use the tool right away, or read on and find out:

  • How to convert UK shoe size to US size;
  • How to convert UK 5 shoe size to US shoe size;
  • How to use the UK to US shoe size converter; and
  • What is a barleycorn?

Various shoe sizing methods

If you've ever tried to buy a pair of shoes abroad, you might have noticed the differences in the shoe sizing methods. For example:

  • In the UK, the shoe size can be counted with the formula:

    shoe size (barleycorn) = 3 × foot length [in] - 23

  • In the United States, you can count the shoe size using the equation:

    shoe size (barleycorn) = 3 × foot length [in] - 22

    for males, and

    shoe size (barleycorn) = 3 × foot length [in] - 21

    for females.

You might notice the barleycorn unit. It's not a grain! 😊 It's equal to exactly 1/3 of an inch.

Using UK to US shoe size converter

To use our UK to US shoe size converter:

  1. Determine if you want to find adult or child sizes.
  2. Now type in the UK shoe size.
  3. The US shoe size will appear immediately in the field just below the UK size row.
  4. Remember you can also look at the other shoe sizing ways, including the foot length.

How to perform UK to US shoe size on your own

If you already know the UK size and want to count the US size on your own, you need to:

  1. Add 2 barleycorns for women, or
  2. Add 1 barleycorn for men.

More shoe sizing tools

Got interested in shoe sizing? Check out our other shoe tools:

  1. Shoe size conversion;
  2. US to EU shoe size converter;
  3. US to UK shoe size converter; and
  4. EU to US shoe size converter.


How do I convert UK 5 size to US shoe size?

UK 5 = US 6 (men) or US 7 (women)

To convert UK 5 shoe size to the US size:

  1. The UK 5 size is actually 5 barleycorns.
  2. Add 1 barleycorn, if the size is for men. 5 + 1 = 6.
  3. Add 2 barleycorns, if the size if for women. 5 + 2 = 7.

How do I convert women's shoe sizes from the UK to the US?

To convert women's shoe sizes from the UK to the US:

  1. Add two barleycorns to the UK size.
  2. US size = UK size + 2
  3. Remember that this calculation is just the starting point; brands have various sizing methods, and it's optimal to try the shoes on before buying them.

How do I convert men's 11 UK shoe sizes to the US?

To convert male UK shoe size 11 to the US size:

  1. Add one barleycorn to the UK size.
  2. US size = UK size + 1
  3. Remember that shoe manufacturers may have their own size conversion table – if that's so, if preferable to use the specific sizing method.
Aleksandra Zając, MD
Adult or child?
Shoe size
UK/AU men (0-15)
US/CA/AU women (1-15)
US/CA men (1-14)
Foot length
foot length measurement
More shoe sizes
EU (33.5-50)
MX / JP (19.5-32)
Korea (195-320)
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