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 Calculate the Diameter of a Circle From a Linear...
How to Find the Volume of a Sphere in Terms of Pi
How to Convert Meters per Second to Miles per Hour
How to Convert mm Hg to in Hg
How to Convert mmHg to a kPa
How to Calculate Sides of a Triangle
How to Calculate Angle From Tangents
How to Convert Inches to the Metric System
How to Change a Ratio Into a Decimal
How to Convert mm to Fractional Inches
How to Get the Fraction Equivalent of a Whole Number
How to Convert Inches to 16ths of an Inch
How to Convert MPH to Feet Per Second
How to Convert Taper to Degrees
How to Calculate Test Accuracy Ratios
How to Type a Mixed Fraction in a TI-83 Plus
How to Convert 48 Millimeters to Inches
How to Calculate a Natural Logarithm
How to Calculate KVA to MVA
How to Convert Inches Into Feet

Dont Go!

We Have More Great Sciencing Articles!