# How Much Material is Required For a 100 Square Feet RCC Slab?

475.2 kg cement, 17.5 cft fine aggregate, 35 cft coarse aggregate and 285 kg steel reinforcement is required for a 100 square feet rcc slab of 4 inch thickness with M20 grade of concrete. Read the calculation below to understand in detail.

**Calculation of Materials Required for a 100 Sq Ft RCC Slab (5 Inch)**

To calculate the quantity of cement, sand, coarse aggregate and steel required for a 100 square feet slab, we have some requirements and considerations in the slab.

**Requirements and Considerations for the Slab**

- Size of Slab = 100 Square Feet
- Thickness of Slab = 5 Inch
- Grade of Concrete Used = M20

**Volume of Slab (RCC Work) Calculation**

Volume of RCC Slab

= Area of Slab × Thickness of Slab

= 100 Square Feet × (5 Inch/12) Feet

=

**41.67****cft**Hence, Total Volume of RCC Work

= 41.67 cft (Wet Concrete).

**Dry Volume of Concrete Calculation**

- Ratio of Concrete (M20) = 1:1.5:3 (Cement : Sand : Coarse Aggregate)
- Shrinkage Factor = 1.54 (54 % extra for dry volume)
- Total Concrete Ratio (1:1.5:3) = 1+1.5+3 =
**5.5** - Total Volume of Dry Concrete = 1.54 × 41.67 cft =
**64.17****cft**

**Volume of Cement in RCC Work**

= (Ratio of Cement/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (1/5.5) × 64.17 cft

=

**11.67****cft**or 0.33 m³Since, density of cement is 1440 m³/kg

So, weight of cement is 0.33 m³ × 1440 kg/m³ = 475.2 kg

**Volume of Sand (Fine Aggregate) in RCC Work**

= (Ratio of Sand/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (1.5/5.5) × 64.17 cft

=

**17.5****cft****Volume of Coarse Aggregate in RCC Work**

= (Ratio of Aggregate/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (3/5.5) × 64.17

=

**35****cft****Weight of Steel in RCC Work**

Considering volume of Steel is 2% of total volume of concrete.

= 64.17 × 2 /100

= 1.283 cft or 0.0363 m³

Density of Steel is 7850 kg/m³

Weight of Steel = 7850 × 0.0363 =

**285 kg**

**Material Required for a 100 Square Feet 5 Inch RCC Slab**

- Total Cement Required = 475.2 kg
- Total Sand Required = 17.5 cft
- Total Aggregate Required = 35 cft
- Total Weight of Steel Required = 285 kg

**Note:**This quantity just for reference and it is based on above assumptions and it may vary depending upon material type and other design changes.

**Calculation of Materials Required for a 100 Sq Ft RCC Slab (4 Inch)**

To calculate the quantity of cement, sand, coarse aggregate and steel required for a 100 square feet slab, we have some requirements and considerations in the slab. In this, we are considering 4 inch thickness of the slab.

**Requirements and Considerations for the Slab**

- Size of Slab = 100 Square Feet
- Thickness of Slab = 4 Inch
- Grade of Concrete Used = M20

**Volume of Slab (RCC Work) Calculation**

Volume of RCC Slab

= Area of Slab × Thickness of Slab

= 100 Square Feet × (4 Inch/12) Feet

=

**33.33****cft**Hence, Total Volume of RCC Work

= 33.33 cft (Wet Concrete).

**Dry Volume of Concrete Calculation**

- Ratio of Concrete (M20) = 1:1.5:3 (Cement : Sand : Coarse Aggregate)
- Shrinkage Factor = 1.54 (54 % extra for dry volume)
- Total Concrete Ratio (1:1.5:3) = 1+1.5+3 =
**5.5** - Total Volume of Dry Concrete = 1.54 × 33.33 cft =
**51.33****cft**

**Volume of Cement in RCC Work**

= (Ratio of Cement/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (1/5.5) × 51.33 cft

= 9.33 cft or 0.264 m³

Since, density of cement is 1440 m³/kg

So, weight of cement is 0.264 m³ × 1440 kg/m³ = 380.2 kg

**Volume of Sand (Fine Aggregate) in RCC Work**

= (Ratio of Sand/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (1.5/5.5) × 51.33 cft

= 14 cft

**Volume of Coarse Aggregate in RCC Work**

= (Ratio of Aggregate/ Total Ratio of Concrete) × Total Volume of Dry Concrete

= (3/5.5) × 51.33

= 28 cft

**Weight of Steel in RCC Work**

Considering volume of Steel is 2% of total volume of concrete.

= 51.33 × 2 /100

= 1.027 cft or 0.0291 m³

Density of Steel is 7850 kg/m³

Weight of Steel = 7850 × 0.0291 =

**228 kg**

**Material Required for a 100 Square Feet 4 Inch RCC Slab**

- Total Cement Required = 380.2 kg
- Total Sand Required = 14 cft
- Total Aggregate Required = 28 cft
- Total Weight of Steel Required = 228 kg

**Note:**This quantity just for reference and it is based on above assumptions and it may vary depending upon material type and other design changes.