We Americans are so used to seeing decimals or fractions for measurements that it’s not been easy for us to adapt to the metric system. Unfortunately, the industry standard sizes of most electronic components are provided in datasheets and descriptions as metric equivalents.

Need to convert a fraction or decimal to the metric system easily? Here is a decimal to fraction to millimeter conversion chart that will make that task easy for you. If you want to convert a number more precisely, use this link to jump to an online metric conversion calculator.

Of course, you can just use standard fractions, but it’s hard to find a T1 3/4 LED when you’re looking for it as a 0.19685 inches LED.