# Concrete calculator formula

15 March 2019# Concrete calculator formula

__What is concrete?__

__What is concrete?__

Concrete is one of the most commonly used building materials.

Concrete is a composite materialmade from several readily available constituents(aggregates, sand, cement, water).

Concrete is a versatile material that can easily be mixedto meet a variety of special needs and formed to virtually any shape.

__What you should know Before Estimating :__

__What you should know Before Estimating :__

**Density of Cement ** = 1440 kg/m3

**Sand Density ** = 1450-1500 kg/m3

**Density of Aggregate **= 1450-1550 kg/m3

**How many KG in 1 bag of cement **= 50 kg

**Cement quantity in litres in 1 bag of cement ** = 34.7 litres

**1 Bag of cement in cubic metres ** = 0.0347 cubic meter

**How many CFT (Cubic Feet)** = 1.226 CFT

**Numbers of Bags in 1 cubic metre cement **= 28.8 Bags

Specific gravity of cement = 3.15

Grade of cement = 33, 43, 53

Where 33, 43, 53 compressive strength of cement in N/mm2

M-20 = 1 : 1.5 : 3 = 5.5, (Cement : Sand : Aggregate)

Some of Mix is – 5.5

Where, M = Mix

20 = Characteristic Compressive strength

Consider volume of concrete = 1m3

Dry Volume of Concrete = 1 x 1.54 = 1.54 m3 (For Dry Volume Multiply By 1.54)

__Calculation for Cement, Sand and Aggregate quality in 1 cubic meter concrete:__

__Calculation for Cement, Sand and Aggregate quality in 1 cubic meter concrete:__

__CALCULATION FOR CEMENT____QUANTITY__

Cement= (1/5.5) x 1.54 = **0.28 m ^{3 }**

**∴**1 is a part of cement, 5.5 is sum of ratio

**Density of Cement is 1440/m**^{3}= 0.28 x 1440 = 403.2 kg

**We know each bag of cement is 50 kg**

For Numbers of Bags = 403.2/50 = 8 Bags

** We Know in one bag of cement = 1.226 CFT**

** For Calculate in CFT (Cubic Feet)** = 8 x 1.225 = 9.8 Cubic Feet

__CALCULATION FOR SAND QUANTITY__

Consider volume of concrete = 1m^{3 }

**Dry Volume of Concrete = 1 x 1.54 = 1.54 m ^{3}**

** Sand=** (1.5/5.5) x 1.54 = 0.42 m^{3 }**∴ **1.5 is a part of Sand, 5.5 is sum of ratio

**Density of Sand is 1450/m ^{3}**

**For KG** = 0.42 x 1450 = 609 kg

** As we know that 1m ^{3} = 35.31 CFT**

For Calculation in Cubic Feet = 0.42 x 35.31 = 14.83 Cubic Feet

__CALCULATION FOR AGGREGATE____QUANTITY__

**Consider volume of concrete = 1m ^{3 }**

**Dry Volume of Concrete = 1 x 1.54 = 1.54 m ^{3}**

**Aggregate = ** (3/5.5) x 1.54 = 0.84 m^{3 }*∴ 3 is a part of cement, 5.5 is sum of ratio*

*Density of Aggregate is 1500/m*^{3 }

Calculation for KG = 0.84 x 1500 = 1260 kg

**As we know that 1 m3 = 35.31 CFT**

**Calculation for CFT ** = 0.84 x 35.31 = 29.66 Cubic Feet

#### Concrete Quality calculation sheet download

**Calculation for Cement, Sand quality in mortar for Plaster:**

**Area of brick wall for plaster** = 3m x 3m =9m^{2}

Plaster Thickness = 12mm **(Outer-20mm, Inner 12mm)**

Volume of mortar = 9m^{2} 0.012m = 0.108m^{3}

Ratio for Plaster Taken is = 1 : 6

Sum of ratio is = 7

**Calculation for Cement Volume**

Dry Volume of Mortar = 0.108 1.35 = 0.1458 m^{3}

**Cement**= (1/7) = 0.0208 m^{3 }

*Density of Cement is 1440/m ^{3}*

= 0 1440 = **29.99 kg**

We know each bag of cement is 50 kg

= (29.99/50) = **0.599 Bags**

**Calculation for Sand Volume**

**Sand** = (6/7) x 0.1458 = 0.124m^{3}

*Density of Sand is 1450/m ^{3}*

= 0 1450 = **181.2 kg**

Now we find how many CFT (Cubic feet) Required

* As we know that 1m ^{3} = 35.31 CFT*

= 0.124*35.31

** = 4.37 CFT (Cubic Feet)**

#### Plaster calculation sheet download

Reference : *tutorialstipscivil.com*