COMPLETE GUIDE: How To Calculate Number Of Blocks To Fence One Plot Of Land (100 by 50, no pillar)

How to calculate blocks for fence

When we talk about Fencing projects, I know someone would want to wonder why fencing is very important to us. Well, fence is very important as it helps secure your plot of land from encroachment. Now I am going to write on how you could easily calculate the number of Blocks Required to Fence a Plot Of land with ease.

On this current post, I’ll be using a plot measuring 100ft by 50ft but then, it’s all the same procedure except you’ve never been a fervent reader here.
So how do we calculate the number of blocks required to fence one plot of land?
From this Post, You will get to know:
The number of bags of cement needed for this project,
Amount of sharp sand that will be required as well as the 
Number of trips of granite you’ll need
 
The simplest way to calculate the numbers of blocks you need for your fence project, assuming you are fencing a land measuring 100 feet by 50 ft, a standard plot 
 

 

This calculation is based on 6 inches block fence and by the time I’m done, you’ll only need to ask your engineer when he’s commencing work on your site.

 

 
How To Calculate The Number Of Blocks To Fence One Plot Of Land
 

 

Before we start, lets understand The measurement we are using is 100 ft (length) and since we have two lengths that is multiply by 2 which is 200 ft. (10 x 2) = 200
 

 

The breadth is 50 ft and also since we have 2 breadths that equal 100 ft (50 x 2) = 100 

 

 

 


Then (200 + 100) that is 300 feet perimeter line fencing.

 

 

 

 

The calculation For Number a of Blocks Goes Thus
 

 

(we are to convert this 300 feet to inches ) since a foot is 12 inches , now let us multiply 12 inches by 300 ft which is 3600 inches. 

 

 

 

Now to get the line numbers of blocks that will go around the fence perimeters of 3600 inches or 300 feet, we would need to divide 3600 by 18 inches, since the length of any block be it 6 inches or 9 inches is 18 inches.

 

 

 

 

 

Now 3600 inches divided by 18 inches is approximately 200 line of blocks , then we must multiply that by the numbers of coaches of blocks you want for your height, assuming 7 ft which is 9 coaches that means 200 multiplied by 9 which is 1800 blocks and that is all you need anything aside from this is fake and fraud.

 

 

 
Note: Its always recommended that you make an allowance by adding 10% of the total number of blocks to cater for breakages but you can still decide to work with just 1800 since I know we didn’t leave space for joints.
 
 
Now let’s consider other things
Now that we’ve known the number of blocks required to fence a plot of land, the next question would focus on ascertaining the number of bags of cement that would enable us bond the 1800 blocks calculated above.
 

 

HOW MANY BAGS OF CEMENT WOULD BE REQUIRED TO BOND THE 1800 BLOCKS?

 

In our normal English we call the act of bonding Setting of block

 

 

 

By standard, it is required that a bag of cement be used for 70 blocks (it could be lower if you’re using hollow blocks)

 

 
Therefore, for 1800 blocks, you’ll need 1800/70 = 25.71 bags of cement or approximately 26 bags of cement.
 
Note: This highly depends on the mix ratio used for mortar. Mix ratio could differ, it all depends on the engineer on site.
 
As For the number of Trips Of granite you’ll need, it all depends on what your pocket can carry.
 
 
While I recommend that granite be incorporated into the foundation concrete, it’s not compulsory that it be used. This of course depends on where you are, for a plot of land situated in a highly swampy area, casting is very compulsory, it may even be decided that reinforced concrete be used before introducing blocks.
 
Well, I hope I’ve been able to describe in details how to easily calculate the number of blocks required to fence your plot of land in Nigeria, especially for a 100 by 50ft plot.
 
Feel free to use the comment section to ask your questions. Do not forget
 
 

 

 

See Also:  What is the Cost of Fencing a Plot of Land (100 x 50 with pillars) - Complete Guide

Written by Nwachukwu Richard

Found this awesome? Well, i love to share and talk about my site experiences with you as i know they're topnotch, will help you achieve your dreams as a student, estimator, Landlord, etc!

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77 Comments

  1. Greetings. My Engr. I have a land measuring 200feet x 200feet to fence. With d calculation pattern u stated above,I have used it to get d total of blocks I needed, which is 2500 blocks and 40 bags of cement for bonding d blocks together. The ideal coaches or level is 4 coaches or levels. My question is, does it require a reinforced concrete plant at d middle of the line of each side of the land?

  2. @Seysony
    The use of Reinforced concrete on fence projects depends on a few factors

    1. Location of Fence with reference to the road. If the fence is very close to a busy road, specially that plied by heavy duty trucks/Heavy vehicular traffic, then its highly recommended that you put a column at every 6th block

    2. The nature of the soil: If the site is located on a plot with weak soil/peat or swampy area, you can use Columns also

    3. Size of the Plot: This is where I think you need most. You mentioned 200 x 200. So if you're fencing this, I think you'll need to place columns at regular intervals. The gap between each column is something that must be decided by the site engineer considering factors 1 & 2 above.

    However, if you have money, you can also use columns wherever you want it

    Enjoy

  3. Hello there, great job with your calculations . It is very helpful. However, i wish to point out a fundamental point of note in your calculation. Your calculation was for a flat fence that had all for sides sealed. if you make a provision for a gate, then the width won't be 50×2 because the gate will take up a large chunk of the front wall. Great article sir.

  4. Introducing a pillar at 10 block span will leave a weak wall. Make a pillar every 6 blocks especially if the said plot is located close to a road way!

    6 blocks will be strong but also ensure you consider the nature of the soil as some soil would require reinforcements due to weak or poor bearing capacity

  5. I APPRECIATE YOUR INFORMATION,BUT YOU SHOULD HAVE SPECIFY TO PEOPLE THAT ARE NOT IN THIS FILED THAT THERE WILL BE A MIDDLE REINFORCEMENT OR BLOCK PILLARS TO PARTITION THE FENCE WALL WHICH I BELIEVE WILL ADD MORE NUMBER OF BLOCKS OR CEMENT REQUIRED. ALSO THE FENCE NEED TO BE CHAIN IN ORDER TO AVOID CRACK THAT WILL DEVELOP WHEN THE SOIL SETTLE.

  6. Good day Mr Richard, pls how can you calculate the number of blocks for a fencing that have block pillars? How can you calculate the number of blocks in each block pillars? Thanks

  7. Am stephen in kenya I have found this very helpful ,now that am looking forward meeting my client for the same plot measuring 100x50ft ,I have the idea and knowledge .be blessed much regards

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