A head circumference of 22 inches (55.9 cm) typically needs a US hat size of 7, a hat size calculator is used to determine the fit hat size based on head measurements using Hat Size (diameter) = Head Circumference / π formula.
It helps convert head circumference measurements into standardized hat sizes, ensuring a comfortable and proper fit.
For example:
- A head circumference of 22 inches (55.9 cm) typically corresponds to a US hat size of 7.
- A measurement of 58 cm might translate to a UK hat size of 7 1/8.
- A US hat size of 7 1/4 converts to approximately 58 cm in head circumference.
These calculators often provide conversions between different sizing systems, such as US, UK, and European sizes, making it easier for consumers to find the right fit regardless of the manufacturer’s sizing standard.
Hat Size Calculator
| Head Circumference | Calculation | US Size | UK Size | European Size |
|---|---|---|---|---|
| 21 inches (53.3 cm) | 21 / 3.14159 ≈ 6.68 | 6 3/4 | 6 5/8 | 54 |
| 22.5 inches (57.2 cm) | 22.5 / 3.14159 ≈ 7.16 | 7 1/8 | 7 | 57 |
| 23.5 inches (59.7 cm) | 23.5 / 3.14159 ≈ 7.48 | 7 1/2 | 7 3/8 | 60 |
| 24 inches (61 cm) | 24 / 3.14159 ≈ 7.64 | 7 5/8 | 7 1/2 | 61 |
| 25 inches (63.5 cm) | 25 / 3.14159 ≈ 7.96 | 8 | 7 7/8 | 63 |
Hat Size Formula
The basic hat size formula is simple:
Hat Size = Head Circumference / π (pi)
This formula works because hats are typically sized based on the diameter of the hat, not the circumference of your head.
Since the circumference of a circle (in this case, your head) is equal to π times the diameter, we can derive the diameter (hat size) by dividing the circumference by π.
For example:
- If your head circumference is 23 inches:
- Hat Size = 23 / 3.14159 ≈ 7 3/8 (in US sizing)
- For a head circumference of 58 cm:
- Hat Size = 58 / 3.14159 ≈ 18.46 cm diameter.
- This would typically be rounded to the nearest size, which is often 7 1/4 in US sizing or 58 in European sizing.
How do I calculate hat size?
To calculate your hat size, follow these steps:
- Measure your head: Use a flexible measuring tape to measure the circumference of your head. Place the tape about 1/8 inch above your ears and across your mid-forehead, completely circling your head.
- Record the measurement: Note down the measurement in inches or centimeters.
- Use a hat size chart: Compare your measurement to a hat size chart to find your corresponding hat size. Many charts provide conversions between different sizing systems.
- Consider the hat style: Some hat styles may fit differently, so always check the specific manufacturer’s sizing recommendations.
- Use online calculators: Many websites offer hat size calculators where you can input your head measurement and get instant size conversions.
Remember, hat sizes can vary slightly between manufacturers, so it’s always best to try on a hat or check the specific brand’s sizing guide when possible.
Hat Size Fitted Chart
| Head Circumference (inches) | Head Circumference (cm) | US Hat Size | UK Hat Size |
|---|---|---|---|
| 21 1/8 | 53.7 | 6 3/4 | 6 5/8 |
| 21 1/2 | 54.6 | 6 7/8 | 6 3/4 |
| 21 7/8 | 55.6 | 7 | 6 7/8 |
| 22 1/4 | 56.5 | 7 1/8 | 7 |
| 22 5/8 | 57.5 | 7 1/4 | 7 1/8 |
| 23 | 58.4 | 7 3/8 | 7 1/4 |
| 23 1/2 | 59.7 | 7 1/2 | 7 3/8 |
| 23 7/8 | 60.6 | 7 5/8 | 7 1/2 |
| 24 1/4 | 61.6 | 7 3/4 | 7 5/8 |
What hat size is 22 inches?
A head circumference of 22 inches corresponds to approximately a US hat size of 7 or a UK hat size of 6 7/8. In European sizing, this would be close to a size 56.
Average Hat Size By Age
| Age Group | Average US Hat Size | Average Head Circumference (inches) | Average Head Circumference (cm) |
|---|---|---|---|
| Newborn | 6 3/8 | 13 – 14 | 33 – 35.6 |
| 3 months | 6 1/2 | 16 – 17 | 40.6 – 43.2 |
| 6 months | 6 5/8 | 17 – 18 | 43.2 – 45.7 |
| 12 months | 6 3/4 | 18 – 19 | 45.7 – 48.3 |
| 2 years | 6 7/8 | 19 – 20 | 48.3 – 50.8 |
| 3-5 years | 6 7/8 – 7 | 20 – 21 | 50.8 – 53.3 |
| 6-12 years | 7 – 7 1/4 | 21 – 22 | 53.3 – 55.9 |
| Adult Female | 7 1/8 – 7 1/4 | 21.5 – 22.5 | 54.6 – 57.2 |
| Adult Male | 7 1/4 – 7 3/8 | 22.5 – 23.5 | 57.2 – 59.7 |
52 cm hat size for what age?
A hat size of 52 cm is generally suitable for children aged approximately 2 to 3 years old, as this size aligns with typical head circumferences for toddlers.
Head sizes can vary significantly among children of the same age due to genetic and developmental factors.
Additionally, some adults with smaller head sizes may also wear a 52 cm hat comfortably. To ensure a proper fit, it is recommended to measure the head circumference just above the ears and eyebrows.
What hat size is a 23 inch head?
A head circumference of 23 inches corresponds to:
- US hat size: 7 3/8
- UK hat size: 7 1/4
- European size: approximately 58-59
What hat size is 57cm?
A head circumference of 57 cm translates to:
- US hat size: 7 1/4
- UK hat size: 7 1/8
- European size: 57 (which is the same as the measurement)
What hat size is 20 inches?
A head circumference of 20 inches is typically associated with:
- US hat size: 6 3/8
- UK hat size: 6 1/4
- European size: approximately 51
This size is often found in the children’s hat range, typically fitting children around 2-3 years old, but as mentioned earlier, individual sizes can vary.
