How to Convert Decimal Inches into Mm

Converting decimal inches into millimeters can be done with a simple multiplier.
••• feet and inches image by John Sfondilias from

In the United States, inches is the standard unit of measurement for small distances. However, that is slowly changing with the increased importation of foreign products, which are produced based on the metric system's millimeter measurement. Inches can be easily converted into millimeters with simple multiplication. It does not matter if the inches are whole numbers, decimals or fractions, the conversion only requires a conversion multiplier.

    Find the length in inches. This can be done by referencing a fact or measuring an object with a tape measure.

    Multiply the number of inches by 25.4 to convert them into millimeters. As an example, if you had a length of 8.125 inches, you would multiply that number by 25.4 to equal 206.375 millimeters.

    Round the number off to the same number of "significant figures" as the original measurement. Significant figures are any digits (except zeros) placed to the left of the first non-zero number. In the example, 206.375 is rounded to 206.4 millimeters.

Related Articles

How to Convert Inches to the Metric System
How to Convert Inches to 16ths of an Inch
How to Find the Perimeter of Different Shapes
How to Convert 7/8 Inches to mm
Difference Between Inches & Centimeters
What Is the Difference Between Yards & Feet?
How to Determine Square Feet Area
How to Convert Inches & Pounds to Centimeters & Kilograms
How to Calculate Height, Width & Square Feet
How to Convert Decimal to Ruler Measurement
How to Convert 55 X 40 X 20 CM to Inches
How to Write Number Measurement Dimensions
How to Convert Inches to Mm
How to Find the Volume of a Sphere in Terms of Pi
How to Convert 48 Millimeters to Inches
How to Convert Tenths to Inches
How to Calculate Metric Conversions
How to Measure the Length of the Diagonal Line of a...

Dont Go!

We Have More Great Sciencing Articles!