Steel quantity by thumb rule

How can we get the steel quantity by thumb rule ? I know that it is 1% for slab and 2-3% for RCC column & beams. If I have 10 Cum RCC work for column & beam then how can we get the steel quantity in kgm or Qntl.?

Questions by jaganmodi

Showing Answers 1 - 58 of 58 Answers

rajesh kumar

  • Jun 11th, 2012

We are using 70kg of steel for 1cum..

Ravi Chaore

  • Sep 22nd, 2012

86kg/cum of concrete

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omprakash singh

  • Oct 23rd, 2013


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B.Mohamed mansoor

  • Nov 3rd, 2013

86 kg/cum of concrete

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Md. Nesar Uddin, PowerPac, Bangladesh.

  • Jan 12th, 2014

For RCC Beam & Column need 2-3% steel, say 2.5% steel.
So, for 10 cum RCC =10×2.5%=0.25 cum steel. =1962.5kgm. Steel. [I know 1 cum steel=7850 kgm]
For, 1 cum RCC =1962.5/10=196.25 kgm. Steel.
So, we are using 196.25 kg steel for 1 cum.RCC work in column & beam.

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  • Feb 24th, 2015

How much steel is required for 600 sqft of roof slab with 4 inch thickness

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  • Feb 26th, 2015

180 kgs this answer having from of my experience in my site.

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  • Mar 2nd, 2015

around 1600 kg

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  • Mar 7th, 2015

so first 10cum converted into CFT that is 353.10(10/0.02832)=353.10 Cft x 7 lbs/Cft =2471.70 then convert in to Kg so =1121.16 Kg is the in 10cum qty of concrete required 1121 kg steel.

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Muhammad bilal

  • May 19th, 2015

1204 kg steel is used in 600sft if we have c/c spacing 4"..

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  • Jun 17th, 2015


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  • Jun 26th, 2015

we use 2.5% of steel for column and for 10 cum of concrete = .025 x 10 =.25cum. 7850kg( vol of steel) x.25 =1962.5kgm

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  • Jul 9th, 2015

I need same calculation for Slab, Staircase and Shear wall

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padma sri.sonti

  • Jul 10th, 2015

We have a formula for that i.e is D^2/162
Where D is Diameter of the steel bar
for example: I want 10m length ,one bar having 8mm dia bar weight
then calculcate by using formula 10*1*8^2/162=3.95kg/m

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  • Jul 11th, 2015

Square of dia / 162

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  • Jul 14th, 2015

Typical reinforcement weights needed for ordinary works:

Slab & staircase-70kg/m3
Beams- 110/m3
Columns & Concrete wall - 150kg/m3
Concrete foundation- 130kg/m3

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  • Jul 21st, 2015

Rohit Sir...You said 150kg for column in 1cum.... but above others say 196.25kg in 1 plz tell exactly

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  • Aug 12th, 2015

Thanks to all for giving this valuable information

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  • Aug 16th, 2015


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raheem uddin

  • Aug 21st, 2015

How to calculate the steel required for 300 sq yards area of land with columns and plinth beams.

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  • Sep 16th, 2015

No... we are using 80 to 100 kg for 1cum

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Nitin kumar

  • Oct 8th, 2015


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Md. Nesar Uddin

  • Oct 13th, 2015

When steel quantity is 2.5% for R.C.C. beam and column, we know 1M3 steel=7850 kgs
For 10 m3 RCC work for column & beam then we can get the steel quantity is 1962.5 kgs.

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Kore Pralhad

  • Nov 30th, 2015

196.2 Kg/m3

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Ishwar Singh

  • Dec 1st, 2015

The above method is good for quantity calculation

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  • Dec 4th, 2015

1.25 tonnes

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  • Dec 19th, 2015

1% of Steel in 6 Cum of Concrete. What is the weight of steel

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  • Dec 22nd, 2015

1.12 tone

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gerardo canero

  • Jan 14th, 2016

For slab reinforcement: 600sq.ft. = 55.77sq.m
Therefore Volume = 55.77 x 0.10m = 5.58cu.m
Steel Quantity = 5.58 cu.m x 100 kg./cu.m = 558kg of diameter 10mm or 12mm.

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  • Jan 27th, 2016


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Mosses E. Ngendero

  • Jan 30th, 2016

It vary but it should always not be less than 100kg/m3, general practices range from 120-125kg/m3 for slab, beams and for soil in pour, massive structures, columns and RC walls it should be 150kg/m3. Remember those are minimum/threshold values, in practice one has to be suspicious with RC details once he/she get values less than above and he/she may consult designer for confirmation.

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  • Jan 30th, 2016

8000 sq ft slab I want to calculate all material quantity.

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pushkar das vaishnav

  • May 7th, 2016


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  • May 27th, 2016

196.25 kg

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manyu saxena

  • Jul 13th, 2016

Steel is used for 600cft is 1334kgm

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  • Jul 17th, 2016

It can vary for person to person as its depends on the design of the particular structure which taking account of other parameters , so this is just the thumb rule under normal circumstances, as in some project the loading of steel in a roof is 100Kg even goes up to 120kgs

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  • Jul 22nd, 2016

2% assume volume of steel =2/100*10m3=.2*7850density of steel =1570

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  • Aug 26th, 2016

For slab 1%=10×1%=0.1
785÷1000=0.785 quantl

For Column and Beam. 2.5%
1962.5÷1000=1.96 quantl.

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yogesh poul

  • Sep 29th, 2016

How to calculate the steel required for 1250 sq. feet plot

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Mukesh Yadav

  • Oct 11th, 2016

Assuming the percentage of steel be 2.5% then quant. of steel in m = 10m x (2.5/100)
=0.25m =0.25mx7850kg/m (as 1m contains 7850kg of steel)=1965 kg of steel I.e. 1.965 quintals

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saravanan s

  • Oct 24th, 2016

Area=600 Sft =600/10.76 =55.7 Sqm
Slab Thickness-4 inch=4 x 2.54=10.16Cm=0.1016m
Concrete Qty=55.7*0.1016=5.66Cum
Steel Qty for slab Normally considered 80Kg/Cum=80*5.56=452.7Kg

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Muhammad Khaliq

  • Oct 28th, 2016

How much steel percentage should we provide in raft foundation for multi-storied building. If so, how will be justify what will be the reference if someone put some observations on this percentage of steel for raft. How will I clarify to them then?

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  • Jan 11th, 2017

600 sq. ft is equal to 55.81 sq.m, i.e, (600/10.75) = 55.81 sq.m
Thickness of slab = 100 mm
Volume of slab: 55.81 * 0.100 = 5.58 cu.m
Steel is assumed to 1% of Volume,
i.e, (1/100)*5.58 = 0.055 cu.m,
Weight of steel is 7850 Kg/cu.m
Thus, Weight * Volume of steel gives, (7850 * 0.055) = 431.75 Kg.
which is equal to 0.431 Tonne

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Bilal Hassan

  • Jan 18th, 2017

How much percentage of steel will be used in Foundation

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  • Jan 23rd, 2017

How much steel we will take for raft footing because steel is double top and bottom

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Mushtaq Ahmad

  • Jan 30th, 2017

Your calculation in wrong, density of RCC is 2406Kg/cum or 150lbs/cft if we take 2.5% of 2406 it will be 60.15 Kg/cum your calculating on basis of 7850 this density of steel but we are asking the steel in RCC not in steel.

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Hasham Chouhan

  • Mar 7th, 2017

449 kg for 600sft slab

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Er. H. R. Rawal

  • May 15th, 2017

Assuming 2.3% of steel in beam & column
Quantity of steel in Kg = Quantity of concrete x Steel % x Unit weight of steel (7850Kg/Cum)
= 10 x 2.3/100 x7850 = 1805.5 Kg

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  • Jun 2nd, 2017

How to calculate{ 3*3*01 =0.9m3} 0.9m3
How to calculate the formula method in RCC Steel?
not in 1m3 [.9m3] in slab, column, beam

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Muhammad Nabi Pakistan

  • Aug 17th, 2017

1 cum = 7850 kg
1 cft = 490 lb
1kg = 2.204 lb

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  • Sep 12th, 2017

for footings - 80kg/cu.m
for columns & slabs - 100kg to 120kg/cu.m
for beams - 120kg to 160kg /cu.m
for cantilevers - 150kg to 200/cu.m (depend on situations)

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sri lakshmi

  • Sep 19th, 2017


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Karunakar Boini

  • Mar 24th, 2018

For 10cum Avg. 2.5%, 1962.5 say 2 t steel required.

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  • May 22nd, 2018

196.25 kg/cum. of cont.

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Mohammed Shehzad

  • May 28th, 2018

I am designing a 19 story building with one basement. and preparing a BOQ. Steel quantities are as above.
Foundation- 95 kg/cu.m
Column -152 kg/cu.m
Beam- 120 kg/cu.m
Slab - 80 kg/cu.m
This quantity is as per BOQ prepared by Excel.
Actual consumption may be +/- 2 %.

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  • Nov 27th, 2018

Quantity of reinforcement for 10m3 column and beam work =1570kg

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Akshay kamble

  • Oct 18th, 2019

Answers are different According to percentage of steel.
1)If I take 2% of steel,then answer is 1570kg.
2) If I take 2.5%,then answer is 1962kg.
3) If I take 3% ,then answer is 2355kg.

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Qaisar Abbas

  • Apr 21st, 2021

My concern is why we are taking density of steel. I think density of concrete is more relevent. Density of concrete is Density of concrete is 2400 kg/m3 and steel is Density of steel is 7850 kg/m3

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