How to Convert Inches to Mm

••• NA/AbleStock.com/Getty Images

Working with the metric system sometimes means converting measurements using simple mathematical formulas. Because metric measurements are expressed in units of 10, it is possible to quickly grasp the increasing difference between millimeters, centimeters and meters. Converting a familiar measurement such as inches into millimeters takes only seconds when using the correct multiplication factor.

Things You'll Need

  • Tape measure or ruler
  • Calculator

    Measure the distance to be converted from inches, using a ruler or tape measure. For example, a CD jewel case is 5 inches wide and 5 inches long.

    Multiply the number of inches by 25.4 to convert to millimeters.

    Use the example to understand the conversion: A CD jewel case 5 inches wide times 25.4 equals 127 mm. As an equation, it is expressed like this: 5 x 25.4 = 127.

    Tips

    • Divide the total millimeters by 25.4 to convert the measurement back to inches.

Related Articles

How to Convert Seconds Into Miles Per Hour
How to Convert Centimeters to Meters
How to Calculate Cubic Yards
How to Convert Inches to 16ths of an Inch
How do I Calculate 0.1%?
How to Change MSF to Linear Feet
How to Convert Pounds Per Square Foot to PSI
How to Convert Taper to Degrees
How to Convert Inches to the Metric System
How to: Improper Fractions Into Proper Fractions
How to Find the Area of Squares
How to Convert Yards to Feet
How to Compare KTS to MPH in Wind Speed
How to Calculate 2/3 of a Number
How to Calculate Tons
How to Convert RPM to MPH With a Calculator
How to Enter a Subscript on the TI-83
How to Find the Volume of a Sphere in Terms of Pi
How to Find the Fractional Part of a Number

Dont Go!

We Have More Great Sciencing Articles!