I think there is.
I found a chart at the webpage on the link below.
Convert tile size to inches X inches. Multiply together. Divide by 144.
A bike size conversion chart provides information on how to convert bike sizes between different measurement systems, such as inches and centimeters. It helps you determine the right size bike frame for your height and body proportions.
Unfortunately every designer uses different sizes for various reasons. The included link has one such conversion of sizes to inches but this is not guaranteed to be correct for other brands. However it should be close.
There is a very solid site that allows people to check on how ring sizes convert based on location. It is called Online Conversion and has a very comprehensive chart.
To convert German shoe sizes to English shoe sizes, you can refer to a shoe size conversion chart online or in stores. Keep in mind that sizing can vary between brands, so it's best to try on shoes or refer to the specific brand's size guide when possible. Generally, you can find a conversion chart that shows the corresponding sizes for men's, women's, and children's shoes.
The conversion factor to convert inches to "Nominal Bore" (NB) is 25.4 mm per inch. NB sizes are based on the internal diameter of a pipe, and they do not directly correlate to inches.
There is no easy way to convert Australian sizes to European sizes since they are so different from each other. You would have to use a measurement chart or size guide.
Sizes chart in French
eurpoean sizes go by the child's height/length in centimeters. Measure how many inches your child is and multiple the total by 2.5 to get centimeters (ex: height 3ft = 36 inches x 2.5 = 90 centimeters)
A bicycle sizes chart provides information on the different sizes of bicycles available, including frame sizes, wheel sizes, and recommended rider heights for each size. This chart can help you choose the right size bike for your height and riding preferences.
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