concrete calculator - estimate cement, sand, gravel quantity
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate material consumption viz., cement, sand, stone gravel for the following concrete mix ratios - 1:1.5:3, 1:2:4, 1:3:6, 1:4:8, 1:5:10. Once, the quantities are determined, it is easy to estimate the cost of a concrete block, driveway, patio, yard or any other structure with the price prevailing in your area.
Our mix-on-site concrete calculation is based on batching by volume (Large construction sites employ batching by weight which is more exact). You can also estimate the quantity of sand and gravel required by weight; Simply multiply the volumetric quantity of sand and gravel with 1400 kg/m3 (bulk density of sand) and 1600 kg/m3 (bulk density of stone) respectively, when calculating in metric units.
how to calculate cement, sand and coarse aggregate quantity in concrete? - calculator
Please note that the information in Civilology is designed to provide general information on the topics presented. The information provided should not be used as a substitute for professional services.
cement and sand ratio for brickwork. how to calculate - decorchamp
It is important to know the perfect ratio of cement and sand mix otherwise you wont be able to achieve the desired output. The most important part of the construction, brickwork is done with help of bricks and cement mortar. Depending on the requirement there are different ratios used for cement mortar for brickwork.
Brickwork is done when walls are created by joining the brick with help of cement mortar. These bricks are defined as the basic building element in a room that transfers the load of the roof to the ground. There are various qualities and thickness available in bricks in the construction industry that are bonded together with vertical cross joints. Thereby, lots of cement consumption for brickwork is required.
While working with first class bricks, it should be noted that for the walls with the thickness of 9 the cement sand ratio for brick masonry should be 1:6 and when it comes to a wall of 4.5 thickness the ratio can be made 1:4.
Here is a simple and effective brickwork calculation formula that will help you to understand how much bricks will be required for 1 cubic meter of brick masonry. We can divide the calculation into three parts to find out the amount of cement, sand, and bricks required.
Given that the thickness is 230 mm for 1 cum brickwork and the ratio for cement mortar for brickwork is 1:5. By putting these values in the formula we will be able to find out how to calculate cement consumption for brickwork and how to find out the number of bricks required along with the volume of sand.
With this simple formula, it is easy to estimate the amount of cement consumption required for brick masonry. Remember depending on the class of brickwork of sand cement ratio the total calculation can change. Additionally, a homogeneous mix of sand, cement, and water is the secret of the recipe for a stronger bond between bricks. Therefore, only required a quantity of water should be used, and the mix should be prepared with a mechanical mix to assure the strength of the brick masonry.
how to calculate quantities of cement, sand and aggregate for nominal concrete mix (1:2:4)? - happho
While following a mix design is advised to optimise the material consumption, it is not possible at site to always come up with Mix design. Nominal mix concrete is prepared by approximate proportioning of cement, sand and aggregate to obtain target compressive strength.
Eyeopener :Many popular blogs claim M20 nominal mix as 1:1.5:3 ,however we strongly differ by same.Through this blog,we are also trying to address the same myth which is being carried forward since last 4 decades.
The reason being: With constant research and development in the field of cement technology and its manufacturing process ,a M20 mix of 1:1.5:3(by volume) would be too rich, over engineered and uneconomical (~7.5 bags of cement per cum) and will ultimately result into a M30 concrete and above (IS:456 too have the minimum cement/cementitious content of 06 bags for M20). As the latest generation of 53 grade OPC cement is ultimately giving a strength of 65 to 70 MPa at 28days, 1:2:4 will give a strength of M20.
The DLBD (Dry Loose Bulk Densities) method is anaccurate method to calculate cement, sand and aggregatefor a given nominal mix concrete. This gives accurate results as it takes into account the Dry Loose Bulk Densities of materials like Sand and Aggregate which varies based on the local source of the material
To convert Sand volume into weight we assume, we need the dry loose bulk density (DLBD). This density for practical purposes has to be determined at site for arriving at the exact quantities. We can also assume the following dry loose bulk densities for calculation.
Although empirical method is easy to use in determining the materials requirement for Nominal Concrete mix, it sometimes doesnt give accurate results as it doesnt take into factor the local variations in the materials.
With constant research and development in the field of cement technology and its manufacturing process ,a M20 mix of 1:1.5:3(by volume) would be too rich,over engineered and uneconomical (~7.5 bags of cement per cum) and will ultimately result into a M30 concrete and above, the reason being latest generation of 53 grade OPC cement is ultimately giving a strength of 65 to 70 MPa at 28days.
in my country one bag of cement is 50kg or 0.035cum and for measuring aggregates and sand we use head pans(0.0175cum). for 1cum of concrete the expected materials are cement 6.5bags sand; 0.44cum(26headpans) aggregate;0 0.88(51headpahs).but on site we have to use more material to achieve the expected volume instead of the estimated calculations we arrive here.
can i have answers?
In the step 3 of How To Calculate Quantities Of Cement, Sand And Aggregate For Nominal Concrete Mix (1:2:4) you have calculated that:
01 cum of concrete will require
Cement required = 1/0.167 = 5.98 Bags ~ 6 Bags
Sand required = 115/0.167 = 688 Kgs or 14.98 cft
Aggregate required = 209/0.167 = 1251 kgs or 29.96 cft
Could you please clear How you have converted The Kgs (Kgs/m3) for Sand & Aggregate in to cft.
Thanks & Regds
Thanks a lot for the response,
In your claculations in step-3, I tried to put Units to indentify my confusion as mentioned below.
One bag of cement and other ingredients can produce = 400/2400 = 0.167 Cum of concrete (1:2:4)
01 bag cement yield = 0.167 cum concrete with a proportion of 1:2:4
01 cum of concrete will require
Cement required = 1(m3/bag)/0.167 (m3) = 5.98 Bags ~ 6 Bags OK
Sand required = 115(Kgs)/0.167(m3) = 688 (Kgs/m3) or 14.98 cft
Aggregate required = 209(Kgs)/0.167(m3) = 1251 (kgs/m3) or 29.96 cft
As the units of Sand & Aggregate seem to be in Kgs/m3, therefore multiplication with Bulk Density (Kgs/m3), the result will be unit less. Hence conversion in to cft would not be possible.
Thanks & Regds
We are constructing First floor on existing house having Six Inches RCC slab. We are intended to used marble on the floor. Could you please advise us that what should be:
1- Thickness of cemented part of the floor.
2- Ratio of the concrete.
I am sure you will help us in this regard.
Thanks & Regds
If the ratio of cement, sand and crushed stone for making the concrete needed for a sidewalk is 2:3:4, how many cubic meters of cement is needed to make 4 cubic.meters of concrete. Please help me to solve this.
We have Portland cement in Nigeria the highest which is grade 42.5 ordinary Portland cement is not available in bags. Kindly give the mix calculations for cement grade 42.5 Portland cement for grade 20 and 25 concrete
We have given the materials requirement for M15, M20, M25 and M30 Grade Concretes in the blog. Please refer. If you want 10 mm and 20 mm aggregate mixed in the concrete, mix it in the ratio of 50:50 (of coarse aggregate volume). PCC should be usually be done with M15, so we havent given the ratio for M10.
Estimate the amount of materials and number of batches (maximum 50kg mixing per batch) for:
1.12 cylinders + 12 cubes (6x6x6)
2.Density can be assumed kg/m^3
4.Strength fc = 25Mpa
5.Agg. Size = 10mm
8.Non Air Entrained
9.Fineness Modulus (Fine) = 2.4
10.RoddedDensity (Coarse) = kg/m3
11.Sp. Gravity of Cement = 3.2
12.Sp. Gravity of Fine = 2.3
13.Sp. Gravity of Coarse = 5.3
14.Water Absorption (Fine) = 5.2%
15.Water Absorption (Coarse) = 0.3%
Data is according to ACI comittee report 2011
My question is what are the proportions of
Concrete for specific needs has to be properly designed to identify the ratio of cement, sand and aggregate. The mix proportions shown in the table are for general purpose use like concreting for houses, small scale concrete jobs etc., Request you to get a proper mix design based on max aggregate size, strength, durability and workability..
What is the approximate compressive strength of mix 1:2.5:3 using dalmia dsp (calling as 53 grade cement) and mix 1:2:2.5 using JSW OPC 53 grade. Water cement ratio may be .55-.65. For jsw opc, admixture dr.fixit 100 lw+. All mix in volume Batch.
What is the approximate compressive strength of mix 1:2.5:3 using dalmia DSP (call as 53 grade cement) & another mix 1:2:2.5 using JSW OPC 53 grade. Water cement ratio may be .55-.65. For jsw opc, admixture Dr.fixit 100 lw+. All mix in volume Batch?
calculate cement sand & aggregate - m20, m15, m10, m5 ratio | civil rnd
Proper calculation and relative proportioning of materials are very important to produce cost-effective good quality of concrete. This article will explain you the simple techniques used by engineers to calculate cement, sand, coarse aggregate(gravel or Jalli) and water needed to prepare different concrete grades like M5, M7.5, M10, M15 and M20.
Based on strength, concrete is classified into different grades like M5, M7.5, M10, M15, M20 etc. In concrete grades, the letter M stands for Mix and the following number stands for characteristic compressive strength of concrete in 28 days in the Direct Compression test.
Concrete mix ratios are prescribed ratio of cement, sand and aggregate to get the desired strength in concrete. The volumetric mix ratio of M20 concrete is 1:1.5:3, hence 1 part of cement, 1.5 part of sand and 3 part of aggregate in volume is needed to prepare M20 grade concrete.
However, above concrete mix ratios may not be accurately followed in the construction site. This may be due to a few reasons such as to increase workability (by increasing fine aggregate River sand and M sand) or to reduce cost (by reducing cement content) etc.,
Excess reducing of cement content or increase of sand content will adversely affect the strength of concrete. Hence it is advisable not to increase the fine aggregate (river sand and M sand) content more than 30% above the prescribed ratio in any case.
While mixing of ingredients, cement and sand(fine aggregate) have to fill the gaps between the coarse aggregate before taking their own space. Hence in order to prepare 1 cubic meter of M20, M15 and M10 concrete you need 1.57 cubic meters of total dry volume: of cement, sand and aggregate and incase of M7.5 and M5 concrete you need 1.52 cubic meters total dry volume of cement sand and aggregate.
Many websites are giving different value for total dry volume, but the values given above have been personally verified, many times, and they are in par with different governments Rates of Analysis.
Weight of cement required can be calculated from multiplying the volume of cement with the bulk density of cement. The bulk density of frequently used cement varieties (both PPC and OPC) is 1440 kg/cu.m.
Suppliers sell sand and coarse aggregate in the measurement of Cubic Feet (CFT), UNITS and in lorry or tipper LOADS. One UNIT measurement is equal to 100 cubic feet. One cubic meter is 35.32 Cubic feet.
*As I have explained above, while calculating M7.5 and M5 grade concrete, total dry material required for concrete is taken as 1.52 instead of 1.55 and quantity of sand and aggregate is adjusted for M10 and M5 based on experience.
Lets find out the quantity needed to prepare M20 grade by the codal procedure. Sand is confirmed to Zone II average grading. The ratio of fine to coarse aggregate is chosen as usual as 1:2. From the above table we know we need 250kg of total dry aggregate for our concrete.
For design mix concrete water content is calculated from Wate/Cement ratio which depends on various factors like the weight of cement, workability etc. But for nominal mix concrete IS456 codebook suggests the following quantities per bag of cement.
Sir you have given the derivation to calculate coarse and fine aggregate in kg for one bag of cement.But I need in CFT for one cft of cement how much coarse ,fine aggregate needed in CFT and water required in lit as per IS- 456 & IS-10262 can pls share the derivation for CFT calculation
very nice information shared, but i think this is nice to understand to mechanism of concrete mixing, but at every site material composition is changed, thus it is necessary to provide specimen of material to laboratory for testing so that they can confirm accordingly.
appreciated to nice information.
For Road M 10, M 15 concrete may be used. For any kind of building different grade of concrete is used in different parts of the building. For example foundation, PCC M7.5 and M10 are used but for floor slab only grade above M20 should be used.
Weight to volume ratio of SAND AND AGGREGATE are different in different grades i.e. M20 M15 etc. How has this difference crept in and confuse us? Quantities of components should not differ whether we follow weight method or volume method.
M20 85 kg=15 cft
M15 110 kg=15.82 cft
M10 160 kg=16.64 cft
M5 265 kg=16.64 cft
(All sand quantities) this is to be corrected to avoid propogation of wrong information. Corrected quantities may be mailed to me or correct explanation may be mailed to me.
I understand your question. You should understand that Nominal Mix concrete and Design mix concrete are both different. Though they both have the same Grade name, nominal mix concrete is usually designed for higher strength then mix design concrete. This is due to the fact that while designing nominal mix concrete we dont consider various factors like the type of sand and compactness of sand and, presence of moisture absorbtion. To put it simply that while designing nominal mix concrete, we design for bulk densities of the materials which vary based on the compaction of the material. So, 1. weight to volume ratio WILL differ as any nominal ratio prescribed are only approximation as stated in code books for the reason mentioned above. 2. Quantities of the material will differ but only in acceptable range. 3. The quantities given above are in par with Rate of Analysis of various states and the quantities in the weight given is directly from IS456 recommendation for Nominal mix concrete. If you want accurate proportion and know what you are doing then calculate bulk density of sand and aggregate supplied to your site and tweek the weight proportion ratio to get the volume proportion. The cushion should be provided because the volume is not absolute like weight it differs based on compaction, grading and moisture content of the aggregate.
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I would like to know the approximate total cost for M20 concrete when I use 645 bags of cement of 50 Kg using Msand and 20 mm aggregate..Approx cost is 380 Rs per bag. Would appreciate your quick feedback. Tx
we recently engaged in a contract with a builder and he says 1:3:4 ratio for concrete. he says he normally do this for 2 floor buildings. Is this ratio a good one? please suggest at the earliest. Thanks
Good morning sir, It is very useful information. Now I have started G+2 building construction in 2000SFT (Ground floor area). I have given the contract for construction. They are using 1 : 2.5 : 3 (Actually they have suggested 1 : 2.5 : 3.5 ) for concrete and 1 : 6 for brick work. We are using Ultratech 53 grade cement (OPC) cement. May I know is it good?
Contractors usually add extra sand to reduce the cement content and also to increase the workability(consistency) of concrete. The strength of the concrete greatly depends on the density of the concrete hence we should not play with the ratio of sand to aggregate. I would suggest the ratio of 1:2:3 or 1:1.5:3 for M20 grade concrete and 1:2:4 or 1:2.5:3.5 for M15 grade concrete.
If you prepare concrete with your ration then the concrete will have too much sand. Too much sand causes shrinkage and this will not give high-density concrete. Hence use 1:2:3 for good strength and 1:2.5:3.5 for moderate strength.
If you want to increase strength then reduce the water content and use Chemical admixtures like super plasticisers. If you want good compaction and high density then you can use two different types of aggregates like 10mm aggregate and 20mm aggregate.
I dont think that is a good ratio to obtain good quality of concrete, Mr. Hussain. You will end up using too much sand which is not good for concrete. Maybe 1:3:5 is a good ratio. Either way, you should follow the same procedure given above.
It very easy. Make Excel sheet with the help of Excel formula. And entre data of m20 concrete carefully from the book of estimating costing. Once u will create u can see any quantity of M grade of material. In few seconds just by chang the value but it before all u need to well knowledge of MS. Excell . If u need reliable excel formate data contact me on FB Id vishv Dev bhagat
Sir, how do I calculated or determine the quantity of materials required per cubic meter by weight to create a concrete mix? the specifications are:
1. maximum size aggregate 1.1/2 in.
2. cement content 8 bags per cubic meter
3. W/C ratio 0.65
4. assume air voids 6% of aggregate volume.
There is no nominal mix ratio for m25 grade. some people will say that m25 grade is 1:1:2 but they are wrong. Codebook says that concrete above M20 grade should be designed only by procedure from the IS10262
In your case
Volume of concrete = 1.7 x 1.7 x 0.5 = 1.4 cu.m
It looks like you are using m20 grade mix with extra sand. If you follow that mix proportion then to calculate use this following method.
Total ratio = 1 + 2 + 3 = 6
Cement required = (1/6) x 1.5 = 0.25 cu.m (refer the post to change cu.m to bags)
Sand = 0.25 x 2 = 0.5 cu.m
Aggregate = 0.25 x 3 = 0.75 cu.m