Inch Fraction Calculator for Finding Inch Fractions From Decimal & Metric Measurements

Inch Fraction, Decimal, and Metric Results
Imperial Units
Metric Units

The reality is that many people have a lot of issues with fractions. And when we talk about inch fractions, the problems tend to get worse. Nevertheless, we have no question that you understand how inch fractions can be useful in your daily life. So, we want to make sure that you are perfectly able to use them and that you don’t have any more problems when it is time to find inch fractions from both decimal measurements as well as metric measurements. One of the simplest solutions that you have is to use a simple inch fraction calculator. However, as you probably already know, we want that besides knowing the result, you learn how you can get it when you just can’t access an inch fraction calculator.


The first thing you need to understand is how inch fractions work and how you can easily calculate them.

#1: How Can You Calculate Inch Fractions:

Simply put, all inch fractions share common denominators. They are powers of 2 which is exactly the same as saying that inch fractions denominators can be 2, 4, 8, 16, 32, and 64. Passing the simplicity (just kidding…), you can now understand why converting a decimal to an inch fraction is not that simple. After all, you just can’t find the nearest fraction. However, it’s not as complicated as well.

All you need to do is to find the nearest fraction that has a denominator that is a power of 2.

To make things even simpler for you, the truth is that you just need to find these inch fractions (or similar ones): 1/64, 1/32, 1/16, 1/8, 1/4, or 1/2.

  • Adding & Subtracting Inch Fractions:

When you need to add inch fractions or any fractions at all, you need to make sure that all the fractions share the same denominator. This is actually the first step in order to be able to proceed. Let’s say that you want to add 1/4” and 1/8”. In order to add both inch fractions, you need to multiply the first inch fraction by 2, This includes multiplying both the nominator and the denominator. So, you will end up with want to add 2/8” with 1/8”. As you already know, the result in terms of inch fractions will be 3/8”.

The same goes for the subtractions. The first thing you need to do is to convert both fractions to the same denominator and only then make the calculation. In this case, the result would be 1/8”.

Please notice that whenever you have an inch fraction such as 4/8”, you can simplify it. All you need to do is to divide it by 2 and you’ll end up with 2/4”. As you can see, you can still reduce this fraction. So, you can still divide it again by 2, giving you 1/2”. In case of inch fractions, whenever you have an odd number as the numerator, you won’t be able to reduce the fraction. A simple example is 5/16”.

#2: How To Find Inch Fractions On A Tape Measure Or On A Ruler:


While you already know how to calculate inch fractions, you also need to make sure that you can easily find them on a ruler and on a tape measure. This is another difficulty that many people have. However, just like with the inch fractions calculations, we will make all in our power to help you understand.

The reality is that it’s not complicated at all. It’s more a matter of understanding how it is done and you can be sure you won’t have any more problems in the future trying to find inch fractions on a tape measure or on a ruler.

The best thing you can do is to grab your ruler or measure tape and follow our approach.

As you can see, you have the inches numbers in there. Between the 1 and the 2 numbers, for example, you should see longer markings. All you need to know is that the first long marking is the 1/4 inch marking or the quarter inch marking. The second long marking between 1 and 2 is the 1/2 inch (2/4). And the same goes for the third long marking between 1 and 2 and is 3/4 inch.

If you consider these longer markings that we just established as the main ones, the next longer markings on your ruler or measure tape are the eight inch markings. So, you can easily understand that the first longer marking is the 1/8 inch, the second longer marking id te 3/8, the third longer marking is the 5/8, and so on.

However, if you take a close look at your measure tape or ruler, you will see that you still have a marking there, lying between the 1 and the 1/8 inch. So, following the same process, this marking is the 1/16 inch (sixteenth) marking. The second one will be 3/16 inch, the third one will be 5/16 inch, and so on.

#3: How To Convert Inch Fraction To Metric Measurements:

The truth is that whenever you need to convert inch fractions to metric measurements, you should consider using a good inch fraction calculator. However, it’s always good to know how the calculations are made even if you have an inch fraction calculator available all the time.

So, how can you convert inch fraction to metric measurements?

In order to convert an inch length measurement into 1 millimeter measurement, you will need to perform a sple calculation. All you need to do is to multiply the length that you have by the conversion ratio.

In order to proceed with the calculation, you need to know that 1 inch is equal to 25.4 millimeters. So, all you need to do is to multiply the length in inches that you have by 25.4. Let’s say that you want to convert 5 inches into millimeters. Here’s the calculation you need to do:

5″ = (5 × 25.4) = 127mm

While inches and millimeters are both units that are used to measure length, the main difference between the two is that inches are used in the Imperial (UK) measurements system and is often represented by in, the millimeter is used in the metric system and is often represented as mm.


One of the things that you need to know is that 1 millimeter is equal to .1 centimeters, is equal to 1000 micrometers, and is equal to 5/127 inches. When you look at most metric rulers, you will be able to see them since they are represented by the smallest ticks. 

While the standard rulers have 12 inches, metric combinations tend to have 30 cm. However, you will also be able to find tape measures that come in inches. The most common ones tend to come in legths between 6 and 35 inches. However, there are a wide variety os tools that you can use to take your measurements. These include lasers, yardsticks, micrometers, measuring wheels, calipers, and scales. Nevertheless, when you need to measure an object, the best thing you can do is to get yourself a ruler. Howver, if you are about to purchase one, you need to ensure that you get one with the metric measurements system or with the Imperial measurements system. In case you’re not sure about which one you should get, you need to know that there are rulers that come with both measurements systems.

#4: A Helpful Table:


In case you just need to do a simple conversion, you actually don’t even need to use an inch fraction calculator to do it. Just check the following table where you can see the most basic conversions from inch fractions into decimals and millimeters: