25.48 Millimeters to Inches

25.48 mm ≈ 1.0031 in

Closest fraction: 1″(1 in — differs by less than 1%)

Calculation: in = 25.48 mm × 0.0393701 ≈ 1.0031 in

Millimeter to Inch Converter

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How long is 25.48 mm?

25.48 mm (2.55 cm) is comparable to the width of a thumb or the diameter of a coin.

What does 25.48 mm look like?

Comparable to the width of a thumb or the diameter of a coin
25.48 mm (2.55 cm) is comparable to the width of a thumb or the diameter of a coin.

25.48 mm on the inch scale

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25.48 mm = 1.003 in

How to Convert Millimeter to Inch

1 millimeter = 0.0393701 inches exact

Inch = Millimeter × 0.0393701

Example: 25.48 mm × 0.0393701 = 1.0031 in

Reverse Conversion

To convert inches back to millimeters:

  • Remember, 1 inch equals 25.4 millimeters.
  • To convert 1.0031 in to mm, multiply 1.0031 x 25.4, resulting in 25.48 mm.

exact This conversion factor is exact by international definition.

25.48 mm is also equal to:

  • 2.548 centimeter
  • 0.02548 meter
  • 0.083596 feet
  • 0.027865 yard
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 25.48 millimeters in inches?

25.48 millimeters equals 1.0031 inches. This is calculated by multiplying 25.48 by the conversion factor 0.0393701.

What does 25.48 millimeters look like in inches?

25.48 millimeters (1.0031 inches) is one to four inches — a small component or connector.

How do you calculate 25.48 millimeters to inches?

Multiply 25.48 by the conversion factor 0.0393701. The calculation is 25.48 × 0.0393701 = 1.0031 inches. This factor is defined by international measurement standards.

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25.48 millimeters = 1.00315 inches
25.48 millimeters = 1.00315 inches — conversion chart

Nearby Conversions

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

Also convert Millimeters to:

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