Converting between different units of measurement is a handy skill in many fields, from engineering and construction to design and everyday life. Need to know how many inches are in a certain number of millimeters? You’re in the right place.
This article offers a quick and easy guide to converting 340 mm to inches. We’ll show you the formula, some practical examples, and some helpful resources to make conversions a breeze.
Millimeters (mm) are part of the metric system, while inches (in) belong to the imperial and US customary systems. Let’s dive in!
Millimeters and inches explained
Millimeters and inches are both units we use to measure length, but they belong to different systems. Here’s a quick look at each:
What’s a millimeter?
A millimeter (mm) is a unit of length in the International System of Units, or SI. A millimeter is tiny — it’s equal to one-thousandth of a meter.
Here’s how millimeters relate to other metric units:
- 10 millimeters = 1 centimeter
- 1000 millimeters = 1 meter
What’s an inch?
An inch (in) is a unit of length that’s commonly used in the United States and the United Kingdom. It’s part of the imperial and US customary systems of measurement.
Here’s how inches relate to other imperial units:
- 12 inches = 1 foot
- 36 inches = 1 yard
How to convert millimeters to inches
The formula for converting millimeters (mm) to inches is simple:
inches = millimeters ÷ 25.4
This is because one millimeter equals about 0.03937 inches. So, to convert 340 mm to inches, you would divide 340 by 25.4.
If you want to convert inches to millimeters, you would use the inverse formula:
millimeters = inches × 25.4
How to convert 340 millimeters to inches
To convert 340 mm to inches, you’ll use this formula:
340 mm ÷ 25.4 = 13.3858 inches (approximately)
So, 340 millimeters is roughly 13.3858 inches.
For most purposes, you can round that to two decimal places: 13.39 inches.
People sometimes search for this conversion as “340 mm to in” or “340 Millimeters to Inches”.
Converting to Fractional Inches
In some fields – like woodworking, construction, and certain types of engineering – measurements are often expressed as fractions of an inch, not as decimal inches.
So, how do you convert 13.3858 inches to a fractional inch? Here’s how it works:
- Focus on the decimal portion (.3858).
- Multiply that decimal by the level of precision you need. For example, if you want the nearest 1/16th of an inch, multiply by 16.
- Round the result to the nearest whole number.
- That number becomes the numerator of your fraction, with 16 as the denominator.
So, in our example: 0.3858 16 = 6.1728. Rounding that to the nearest whole number gives us 6. Therefore, 13.3858 inches is about 13 and 6/16 inches, which simplifies to 13 and 3/8 inches.
Common precisions include 1/16, 1/32, and 1/64 of an inch.
Summary
In this article, we’ve covered everything you need to know to convert 340 millimeters into inches. We’ve shown you the formula, worked through the conversion step by step, and explained how to express the result as a fraction.
Knowing how to convert between measurement units is important in many fields, and we hope this article has given you a practical resource for converting millimeters to inches.
Whether you’re a student, an engineer, or just need to make a quick conversion, you should now be able to convert 340 millimeters into inches with confidence.