As an Engineer on site, you must know the amount of cement and sand require for a particular volume of concrete.

Knowing this will prevent you from running loss. I will explain to you how to calculate the amount of cement and sand require for any volume of concrete.

The calculations below is all about **1:2:4 mix ratio** of Concrete

**CALCULATING FOR CEMENTÂ **

TOTAL RATIO = 1+2+4

= 7

Since:

Cement = 1

Sand = 2

Granite = 4

We are dealing with cement, we have 1/7 = 0.143

For 1mÂ³ of cement = 1mÂ³ * 0.143

= 0.143mÂ³

Addition of waste and shrinkage 54% = (54/100 * 0.143) + 0.143

= 0.0772mÂ³ + 0.143mÂ³

= 0.22mÂ³

Density =Â Mass/Volume

1440 = 50/Volume

Volume = 0.03472mÂ³

**1 Bag of Cement = 0.03472mÂ³**

**Y Bags of Cement = 1mÂ³**

Y = 1/0.03472

Y = 28.8 bags of Cement

**1mÂ³ of cement = 28.8 bags**

**0.22mÂ³ of cement = X bags**

X = 6.3 bags of cement

Now for 1:2:4 mix ratio, the number of cement require to mix 1mÂ³ of concrete

= 6.3 bags.

Assuming you are to calculate the amount of cement require for 0.55mÂ³ of concrete

**1mÂ³ of ConcreteÂ = 6.3 bags of cement**

**0.55mÂ³ of concrete = X bags of cement**

X = 3.47 bags of cement.

This means 3.47 bags of cement will mix 0.55mÂ³ of concrete using 1 : 2 : 4 mix Ratio

### CALCULATING FOR SAND

TOTAL RATIO = 1+2+4 = 7

Since we are dealing with sand, we have 2/7 = 0.285

For 1mÂ³ of sand = 1mÂ³ * 0.285

= 0.285mÂ³

Addition of 35% bulking = 0.099mÂ³

Addition of 10% waste = 0.03mÂ³

= 0.285 + 0.099 + 0.03

= 0.414mÂ³

**0.65mÂ³ of sand = 1 ton of sand**

**0.414mÂ³ of sand = x tons of sand**

X = 0.637 tons.

Now for 1:2:4 mix ratio, the number of sand require to mix 1mÂ³ of concrete

= 0.637 tons.

Assuming you are to calculate the amount of sand require for 0.55mÂ³ of concrete

**1mÂ³ of concrete = 0.637 tons of sand**

**0.55mÂ³ of concrete = X tons of sand**

X = 0.35 tons of Sand

This means 0.35 tons of sand will mix 0.55mÂ³ of concreteÂ using 1 : 2 : 4 mix Ratio

**Check outÂ ****How to Calculate The Total Tons of Granite for a Volume of Concrete**

This is a must know calculation for Engineer, Quantity Surveyor and Site Manager on site to avoid wastage of Materials

Comment below to ask question, Add or Subtract

Thanks for Reading.

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Calculating Total Bags of Cement and Tones of Sand Require in a Particular Volume of Concrete

Watch your computations bro, you messed up you used .283 on your computation instead of .285, 2/7= .285 yet you used .283 edit it because its misleading readers

Thanks for the correction. I already take note of that and proper amendment will be made with immediate effect.

AOA

I want to apply plaster on the roof of my top floor flat can you please calculate me the cost of it I don’t know how much cement sand etc will require for it I want the final product to be at least 3 inches thick the area to cover is 1000 sqft

thank you

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How to Calculate The Total Bags of Cement for a Unit Area of Plasteringfor basic explanation, You can also Post this on ourForumfor answers from different people.Thanks for Visiting Engineering Basic

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Hello I want floor an area with concret 3cm thick and 10m wide, 11m long.so I wish to know what quantity of cement in bags, sand and granite in wheelbarrow to use. Thank u

Good information, makes me remember some things i had forgotten. You know sometimes you go to the market place and you tend to forget what you learned in school. Very insightful information. Thanks again PIN.