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# Convert Millimeter to Inches Formula

The millimeters and inches are the units used to measure the length. In the convert millimeter to inches formula, the millimeter unit is defined in the international system of units called SI units, whereas the inches is used in the US customary system of measurements. It is very easy to convert millimeters to inches and vice-versa with the help of this mm to inches formula.

## What is Millimeter to Inches Formula?

The millimeter to inches formula of a given length can be expressed through the below formula. The length of 1milimeter is equal to 0.03937007874 inches, and to convert N millimeters we need to multiply N with 0.03937007874 inches.

### Millimeter to Inches Formula:

N millimeters = N × 0.03937 inches

Let us check a few examples below to understand how to use the millimeter to inches formula.

## Examples Using Millimeter to Inches Conversion Formula

**Example 1:** Jack has a pencil whose length is 177.8 mm and he wants to convert the length of his pencil into inches. What is the length of his pencil in inches?

**Solution: **

To find: The length of the pencil in inches

Given,

Length of the pencil in millimeters = 177.8

Using millimeter to inches formula,

The length of his pencil in inches = (n × 0.03937007874)

= (177.8 × 0.03937) inches

≈ 7 inch

**Answer: **The length of the 177.8 mm pencil in inches is 7.

**Example 2:** Sam is having a scale of 381 mm. What is the length of scale in inches?

**Solution: **

To find: The length of the scale in inches

Given,

Length of the scale in millimeters = 381

Using millimeter to inches formula,

The length of scale in inches = (n × 0.03937)

= (381 × 0.03937) inches

≈ 15 inch

**Answer:**** **The length of the 381 mm scale in inches is 15.

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