hat size calculator

Best Hat size calculator – International (2023)

With the help of our detailed hat size calculator, get the ideal fit for your hat. Convert international sizes with ease for the perfect fit on your head. The days of unpleasant hats are over, and headwear happiness has arrived!

Finding the proper fit for your head is crucial because hats come in various styles and dimensions. Finding the appropriate hat size can be difficult, especially when purchasing anything online when you cannot try it on ahead of time.

How do you calculate your hat size?

To discover your hat size, you need to measure the circumference of your head and use one of the hat size charts. Be careful! American heights are usually greater than British ones.

  • Range of international sizes: XS-S-M-L-XL-XXL-XXXL;
  • Range of American sizes: 6 1/2 – 8 1/8; and
  • Range of British sizes: 6 3/8 – 7 7/8.
  • International sizes for children are based on their age.

How do you measure the head of a hat?

Hat sizes are based on head circumference. To measure it correctly:

  • Take a measuring tape.
  • Find the part that protrudes the most at the back of your head and connect it to the most protruding part of your forehead using the measuring tape, leaving a gap of approximately 0.4-0.8 in (1-2 cm) above your ears.
  • Complete the circumference and write down the result

What is the adult hat size chart?

Head circumferenceInternational sizeUS sizeUK size
20.5 in / 52 cmXS6 1/26 3/8
20.9 in / 53 cmXS6 5/86 1/2
21.3 in / 54 cmS6 3/46 5/8
21.7 in / 55 cmS6 7/86 3/4
22 in / 56 cmM76 7/8
22.4 in / 57 cmM7 1/87
22.8 in / 58 cmL7 1/47 1/8
23.2 in / 59 cmL7 3/87 1/4
23.6 in / 60 cmXL7 1/27 3/8
24 in / 61 cmXL7 5/87 1/2
24.4 in / 62 cmXXL7 3/47 5/8
24.8 in / 63 cmXXL87 3/4
25.2 in / 64 cmXXXL8 1/87 7/8

Hot to use our calculator

How to use: Input the circumference of your head in centimeters or inches. Use the format 7 1/2, 6 3/4, or equivalents when using inches.

Hat Size Converter

Please input the circumference of your head:

Only use this calculator for reference. Fit varies based on the manufacturer, construction, and materials.

If you like fedora hats check our articles about fedora hats for women here.

Frequently Asked Questions

  • What is a hat-size calculator?

    A hat size calculator is a tool that helps you determine your hat size based on your head measurements, typically your head circumference.

  • How accurate are hat-size calculators?

    The accuracy of a hat-size calculator can vary depending on the quality of the tool and the accuracy of the measurements you input. However, the best hat-size calculators will provide reliable and accurate results.

  • Why should I use a hat-size calculator?

    A hat size calculator can help you find the right size to ensure a comfortable and flattering fit. This can be especially important if you’re shopping for hats online and can’t try them on in person.

  • What factors should I consider when using a hat-size calculator?

    When using a hat size calculator, you should consider the shape of your head, the type of hat you’re looking to buy, and any personal preferences for how your hat fits.

  • Are there any other benefits to using a hat-size calculator?

    In addition to helping you find the right size of the hat, using a hat size calculator can also help you save time and money by reducing the likelihood of needing to return or exchange caps that don’t fit properly.


Pashalis Laoutaris

Fashion Blogger

I am a professional writer, fashion blogger, and owner of the site https://laoutaris.com. As a salesperson for more than 20 years, I have experience of 10 years in the fashion industry. I consider myself a true fashionista. I am writing daily blog articles about fashion, tools and converters, and everything you need to know about the current fashion trends.

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