Converting 1 Inch to mm

Instructor: Mia Primas

Mia has taught math and science and has a Master's Degree in Secondary Teaching.

In this lesson, you will learn how the relationships between units can be used to convert units. You will then see two methods for converting 1 inch to millimeters.

Steps for Converting 1 Inch to Millimeters

We can convert from one unit to another by multiplying by the ratio that shows the relationship between the units. The following unit relationships will be used to convert from inches to millimeters.

1 inch = 2.54 centimeters
1 centimeter = 10 millimeters
  • Step 1: Convert inches to centimeters


  • Step 2: Convert centimeters to millimeters



One inch is equal to 25.4 millimeters.

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