508 Millimeters to Inches

508 mm = 20 in

= 1′ 8″

Exact fraction: 20″

Calculation: in = 508 mm × 0.0393701 = 20 in

Millimeter to Inch Converter

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How long is 508 mm?

508 mm (50.8 cm) is comparable to the height of a coffee table or kitchen counter.

What does 508 mm look like?

Comparable to the height of a coffee table or kitchen counter
508 mm (50.8 cm) is comparable to the height of a coffee table or kitchen counter.

508 mm on the inch scale

mm0200.0400.0600.0800.01,000in05101520253035

508.0 mm = 20 in

How to Convert Millimeter to Inch

1 millimeter = 0.0393701 inches exact

Inch = Millimeter × 0.0393701

Example: 508 mm × 0.0393701 = 20 in

Reverse Conversion

To convert inches back to millimeters:

  • Remember, 1 inch equals 25.4 millimeters.
  • To convert 20 in to mm, multiply 20 x 25.4, resulting in 508 mm.

exact This conversion factor is exact by international definition.

508 mm is also equal to:

About these units

Millimeter: Metric unit equal to one thousandth (1/1000) of a meter.

Inch: Imperial/US customary unit standardized as exactly 25.4 millimeters since 1959.

Frequently Asked Questions

How much is 508 millimeters in inches?

508 millimeters equals 20 inches. This is calculated by multiplying 508 by the conversion factor 0.0393701.

What does 508 millimeters look like in inches?

508 millimeters (20 inches) is measured in centimeters or meters for convenience.

How do you calculate 508 millimeters to inches?

Multiply 508 by the conversion factor 0.0393701. The calculation is 508 × 0.0393701 = 20 inches. This factor is defined by international measurement standards.

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508 millimeters = 20 inches
508 millimeters = 20 inches — conversion chart

For general conversions between millimeters and inches, see the millimeters to inches converter.

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 inch = 2.54 cm by international agreement (1959). Last reviewed: March 2026
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.