Instant conversions! Your online calculator always at hand to easily convert inches to millimeter (inch to mm).
Inches to millimeter
From inches (in) to millimeters (mm)
25.40
1 in = 25.40 mm
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This online web calculator is a tool to convert inches to millimeters (in to mm). For the calculation, you just need to enter the length in inches (in) you want to convert. The conversion to millimeters is automatic.
How are inches to millimeters calculated?
For the conversion of inches (in) to millimeters (mm), the formula is simple: millimeters = inches x 25.4 where the equivalence would be: 1 inch is equal to 25.4 millimeters. If you have the distance in inches, you just need to multiply it by 25.4 to get its value in millimeters.
Some calculation examples from inches to mm:
- A 2-inch thick board is exactly 50.8 millimeters, since to convert inches to millimeters you multiply the measurement by the conversion factor of 25.4, that is, mm = 2 x 25.4 = 50.8 mm.
- To convert 1 inch to millimeters, we have to multiply 1 in x 25.4 = 25.4 millimeters.
- If we want to convert inches to millimeters a value of 2 in, the calculation would be 2 in x 25.4 = 50.8 millimeters (mm).
Remember that the inch is a unit of length used in the imperial system, while the millimeter is part of the metric system, mainly used in countries that adopt the international standard.
🟧 What is the purpose of converting inches to millimeters? It is useful in areas such as construction, graphic design, printing, technology, and manufacturing, especially when working with equipment or standards from countries that use the metric system.
Inches to millimeters conversion table
Below, we offer you a table with some already calculated values of inches to millimeters (inch in mm), you can quickly consult them:
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 6 in | 152.4 mm |
| 7 in | 177.8 mm |
| 8 in | 203.2 mm |
| 9 in | 228.6 mm |
| 10 in | 254 mm |
| 15 in | 381 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 30 in | 762 mm |
| 35 in | 889 mm |
| 40 in | 1016 mm |
| 45 in | 1143 mm |
| 50 in | 1270 mm |
| 55 in | 1397 mm |
| 60 in | 1524 mm |
| 65 in | 1651 mm |
| 70 in | 1778 mm |
| 75 in | 1905 mm |
| 80 in | 2032 mm |
| 85 in | 2159 mm |
| 90 in | 2286 mm |
| 95 in | 2413 mm |
| 100 in | 2540 mm |
🟧 Any other questions about the inch to millimeter conversion calculator inch and millimeter, you can contact us from the contact section in the footer.
Frequently asked questions about converting inches to millimeters – FAQ
How are inches converted to millimeters?
To convert inches to millimeters, multiply the number of inches by 25.4. For example: 2 inches × 25.4 = 50.8 millimeters.
What is the formula to convert inches to millimeters?
The formula to convert inches to millimeters is: Millimeters = Inches × 25.4, if we do a calculation example on 5 inches × 25.4 = 127 millimeters.
Why is 25.4 used to convert inches to millimeters?
The value 25.4 mm is the official definition of an inch according to the International System of Units (SI). This standard was established to facilitate interoperability between measurement systems.
How can I calculate inches to millimeters without a calculator?
You can mentally multiply the number of inches by 25 (quick approximation) or use fractions if you need more precision. For example:
3 inches ≈ 3 × 25 = 75 mm (approximate). Using the exact formula would be: 3 × 25.4 = 76.2 mm.
Where is the conversion of inches to millimeters used?
This conversion is common in areas such as: Engineering and construction, graphic design and printing, in the field of technology (e.g., screen sizes), machinery and mechanical manufacturing, etc.
How many millimeters are 2 inches?
2 inches are equivalent to 50.8 millimeters. The calculations would be: 2 inches × 25.4 mm = 50.8 mm.
What is the size of a 15-inch screen in millimeters?
15 inches is equivalent to 381 millimeters. To calculate the diagonal size of a screen: 15 inches × 25.4 = 381 mm.
What is the difference between inches and millimeters?
Inches are a unit of length in the imperial system, mainly used in the United States and some English-speaking countries. Millimeters are a unit of the metric decimal system, used in most countries around the world.
How do I know if something is measured in inches or millimeters?
If you see symbols like ” or in, it is probably in inches. Example: 10″. And if you see mm, it is in millimeters. Example: 254 mm.
Is 1 inch the same as 2.54 centimeters?
The answer is Yes, 1 inch = 2.54 cm, which is equivalent to 25.4 mm. Both conversions are correct because a centimeter has 10 millimeters.
How do I measure something in inches if I only have a ruler in millimeters?
Divide the measurement in millimeters by 25.4 to get the value in inches. For example: 50 mm / 25.4 ≈ 1.97 inches.
How big is a phone with a 6-inch screen?
If your phone has a 6-inch screen, it is equivalent to 152.4 millimeters (6 × 25.4).
How do I memorize the relationship between inches and millimeters?
An easy way is to remember that 1 inch = 25.4 mm. To simplify, think that an inch is approximately 2.5 cm (or 25 mm). This will help you make quick mental calculations.
Why do some people say that 1 inch is equal to 25 mm?
Sometimes, 25.4 mm is rounded to 25 mm to simplify mental calculations. However, this is not accurate and can cause small errors in technical measurements.
