mm to inches calculator
Convert mm to inches: In this tutorial, we will introduce both units: millimeters and inches; learn about the relationship between these two units, create a formula to convert from millimeters to inches, and then use the formula to convert a given number of millimeters to inches with a couple of examples.
Introduction to Millimeters (mm)
Millimeters (mm) are a metric system unit of length commonly used in various fields, including engineering and manufacturing.
One millimeter is defined as 1/1000 of a meter.
Important points to note about millimeters:
- 1 millimeter is equal to 0.001 meters (1/1000th of a meter).
- The symbol for millimeter is “mm.”
- 1 millimeter is equal to 1000 micrometers.
- In the imperial system, 1 millimeter is approximately 0.03937 inches.
Introduction to Inches (in)
Inches are a unit of length commonly used in the imperial system. They are primarily used in the United States and a few other countries.
One inch is defined as 1/12 of a foot and is equivalent to 0.0254 meters in the metric system.
Important points to note about inches:
- 1 inch is equal to 12 lines or 2.54 centimeters.
- The symbol for inch is usually written as “in.”
- 1 inch is exactly 25.4 millimeters in the metric system.
How to Convert from Millimeters to Inches
The relation between millimeters and inches is:
1 millimeter is equal to 0.03937 inches.
Formula for Conversion
We can put the above relation into a formula to convert millimeters (mm) to inches (in).
inches = mm × 0.03937
Examples
Let us go through some real-life examples, where we are given a length in millimeters, and we need to convert that length from millimeters to inches.
Example 1: Convert 100 mm to inches
Consider that we are given a rod whose length is 100 mm. We need to find this rod length in inches.
Solution
Step 1: Write the formula for conversion from millimeters to inches.
inches = mm × 0.03937
Step 2: Substitute the value of mm with 100 in the formula.
inches = 100 × 0.03937
Step 3: Simplify the multiplication present on the right-hand side of the equation.
inches = 3.937
Answer: Therefore, 100 mm = 3.937 inches.
Example 2: Convert 150 mm to inches
Consider that we are given a pipe whose length is 150 mm. We need to find this pipe length in inches.
Solution
Step 1: Write the formula for conversion from millimeters to inches.
inches = mm × 0.03937
Step 2: Substitute the value of mm with 150 in the above formula.
inches = 150 × 0.03937
Step 3: Simplify the multiplication present on the right-hand side of the equation.
inches = 5.9055
Answer: Therefore, 150 mm = 5.9055 inches.
Table of Conversions from Millimeters to Inches
The following table takes lengths of some well-known objects and converts from millimeters to inches.
| Scenario | Length in mm | Length in inches |
|---|---|---|
| Height of a standard smartphone | 150 mm | 5.9055 in |
| Thickness of a credit card | 0.76 mm | 0.0299 in |
| Width of a standard paperclip | 30 mm | 1.1811 in |
| Length of a standard pen | 140 mm | 5.5118 in |
| Height of a water bottle | 250 mm | 9.8425 in |