508 millimeters is equal to approximately 20.0 inches.
To convert millimeters to inches, you divide the length value by 25.4 because one inch equals exactly 25.4 millimeters. So, 508 mm divided by 25.4 gives the length in inches.
Conversion Tool
Result in inches:
Conversion Formula
The formula to convert millimeters (mm) to inches is: inches = millimeters ÷ 25.4. This works because one inch is exactly 25.4 millimeters. So, dividing the millimeter value by 25.4 gives the equivalent length in inches.
For example, converting 508 mm:
- Start with 508 mm.
- Divide 508 by 25.4.
- 508 ÷ 25.4 = 20 inches.
Thus, 508 mm equals 20 inches.
Conversion Example
- Convert 254 mm to inches:
- Divide 254 by 25.4.
- 254 ÷ 25.4 = 10 inches.
- Convert 127 mm to inches:
- 127 ÷ 25.4 = 5 inches.
- Convert 635 mm to inches:
- 635 ÷ 25.4 = 25 inches.
- Convert 100 mm to inches:
- 100 ÷ 25.4 ≈ 3.937 inches.
- Convert 381 mm to inches:
- 381 ÷ 25.4 = 15 inches.
Conversion Chart
The chart below shows millimeter values from 483.0 to 533.0 converted into inches. To use, find your millimeter value in the first column and read across to see the inch conversion.
| Millimeters (mm) | Inches (in) |
|---|---|
| 483.0 | 19.0157 |
| 488.0 | 19.2126 |
| 493.0 | 19.4094 |
| 498.0 | 19.6063 |
| 503.0 | 19.8031 |
| 508.0 | 20.0000 |
| 513.0 | 20.1969 |
| 518.0 | 20.3937 |
| 523.0 | 20.5906 |
| 528.0 | 20.7874 |
| 533.0 | 20.9843 |
Related Conversion Questions
- How many inches is 508 millimeters exactly?
- What is 508 mm in inches rounded to two decimals?
- Is 508 mm longer or shorter than 20 inches?
- How to convert 508 mm to inches without a calculator?
- Why divide by 25.4 to convert millimeters to inches?
- Can 508 mm be converted to feet and inches?
- What is the easiest way to convert 508 mm into inches?
Conversion Definitions
Millimeter (mm): A millimeter is a unit of length in the metric system equal to one thousandth of a meter. It is widely used to measure small distances or thickness in science, engineering, and everyday applications.
Inches (in): An inch is a unit of length in the imperial and US customary systems, equal to exactly 2.54 centimeters or 25.4 millimeters. It is used in countries like the US for measuring length or height.
Conversion FAQs
Why is 25.4 used as the divisor when converting mm to inches?
Because one inch is defined as exactly 25.4 millimeters. So dividing millimeters by 25.4 gives the length in inches. This exact figure standardizes conversions between metric and imperial units.
Can I convert 508 mm to inches manually without tools?
Yes, you can divide 508 by 25.4 using a calculator or long division. This gives 20 inches exactly. For rough estimates, you can remember that 25 mm is about 1 inch.
Is the conversion from mm to inches always precise?
When using the exact conversion factor 25.4, yes the conversion is precise. But rounding during calculations or display can cause small differences.
How do I convert 508 mm into feet and inches?
First convert 508 mm to inches (508 ÷ 25.4 = 20 inches). Then divide 20 inches by 12 to get feet: 1 foot with 8 inches remaining.
Is the millimeter to inch conversion useful in everyday tasks?
Yes, especially in construction, manufacturing, and design where measurements in mm must be converted to inches for compatibility with tools or materials using imperial units.

