How to Convert Millimeters to Inches

A calculator comes in handy when converting millimeters to inches.
••• Rocter/iStock/Getty Images

The millimeter is a unit of length in the metric system. You can convert millimeters to inches in one of two ways: divide the number of millimeters by 25.4, or multiply the number of millimeters by 0.0394.

Worked Example

Suppose you need to convert 51 millimeters to inches. You can divide 51 by 25.4, which equals approximately 2 inches. Alternatively, you may multiply 51 by 0.0394, which again produces about 2 inches. Depending on the degree of accuracy needed, you may opt to round your answer to different digits. For instance, if you convert 17 millimeters to inches, you obtain a result of about 0.669 inches. You might leave this answer as-is, or round it to 0.67 or even 0.7 inch.

Related Articles

How to Convert 48 Millimeters to Inches
Characteristics of Aquatic Plants
How to Convert Inches to the Metric System
How to Convert Inches to 16ths of an Inch
How to Convert Taper to Degrees
How to Change a Ratio Into a Decimal
How to Measure Meters in Feet
How to Calculate the Diameter of a Circle From a Linear...
How to Calculate Angle From Tangents
How to Convert Meters per Second to Miles per Hour
How to Find the Volume of a Sphere in Terms of Pi
How to Use Significant Figures in Multiplication and...
How to Convert mm Hg to in Hg
How to Convert mmHg to a kPa
How to Convert Decimal Inches into Mm
How to Calculate the Area of a Pipe
Can You Define These Impossible Science Terms?
How to Convert mm to Fractional Inches
How to Calculate a Circular Area
How to Convert Centimeters to Meters

Dont Go!

We Have More Great Sciencing Articles!