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Convert Millimeters ‌to‌ ‌Inches‌

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  • Last Updated : 28 Apr, 2022

The millimeter is a metric length unit used to measure small things and amounts such as medicines, the length of a pen tip, and so on. It is most usually abbreviated as ‘mm’. When measuring the length of any item, the units of measurement meter, centimeter, millimeter, and inch are utilized. The term millimeter refers to a thousandth of a meter.

In the imperial and US customary measuring systems, an inch (symbol: in) is a unit of length. In 1959, An inch was defined as being equal to exactly 25.4 millimeters. A foot is 12 inches in length and a yard is 36 inches in length.

1 inch = 25.4 mm 

Convert Millimeters into Inches 

The millimeter unit is specified in the international system of units known as SI units, but the inch unit is used in the US customary measuring system. It is very simple to convert millimeters to inches and vice versa using this mm to in conversion formula and the mm to in conversion table. 

Here, 1 millimeter equals 0.03937007874 inches, and to convert to mm, multiply the amount by 0.03937007874 in. As a result, the formula is,

d(in) = d(mm) × 0.03937007874

Or d(in) = d(mm) / 25.4

Where, d(in) represents value in inches and d(mm) represents value in millimeters. 

Sample Questions

Question 1: Anuj has a tape whose length is 170.8 mm. What is the length of his tape in inches?

Solution:  

To find: The length of the tape in inches                  

Given , Length of the tape in millimeters = 170.8

Using the millimeter to inches formula,

d(in) = d(mm) × 0.03937007874

= (170.8 × 0.03937007874)

= (170.8 × 0.03937) inches

= 6.724 inch

Question 2: What is the length of scale in inches if it is 350 mm?

Solution: 

To find: The length of the scale in inches

Given, Length of the scale in millimeters = 350

Using the millimeter to inches formula,

The length of scale in inches 

d(in) = d(mm) × 0.03937007874

= (350 × 0.03937)

= 13.7795 inches

Question 3: Convert 14 inches into mm?

Solution: 

As we know 1 inch = 25.4 mm 

By using formula: 

d(in) = d(mm) × 0.03937007874

14 = d(mm) × 0.03937007874

or d(mm) =  14 / 0.03937007874 

= 355.6 millimeter 

Or we can simplify it by,

1 inch = 25.4 mm

So to convert,

14 inch = 14 × 25.4 mm

= 355.6 mm

Question 4: Convert 2656.222 mm into an inch?

Solution: 

Given: 2656.222 mm

By using formula,

d(in) = d(mm) × 0.03937007874

= 2656.222 × 0.03937007874

= 104.57576 inch.

Question 5: How to convert 10 mm into an inch?

Solution: 

Given: 10 mm 

Now by formula: d(in) = d(mm) / 25.4

= 10/25.4 

= 0.3937007 in.

Question 6: Convert 250 mm into an inch?

Solution: 

Using the above formula,

d(in) = d(mm) × 0.03937007874

d(in) = 250 × 0.03937007874

d(in) = 9.842519685

Therefore, 250 mm = 9.842519685 in.

Or by using other formula :  d(in) = d(mm) / 25.4

= 250/25.4

= 9.842519685 inch.

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