The quantity of concrete needed for a cylinder depends on diameter and height of the cylinder. To figure the amount of concrete required for a cylinder you can use the formula: V = (π D2/4)xH. Once you have the volume you can calculate the quantity of concrete needed based on the density of concrete mix you plan to use.

In civil engineering concrete material is needed for formation of circular column or to fill the any hole between the brick wall which are in cylindrical shape. Hence circular column and any hole which are in present in cylinder shape we have to calculate concrete quantity like quantity of sand cement and aggregate to required to fill any hole and for formation of circular column of concrete.

Concrete cylinders serve various purposes in construction and engineering: concrete cylinders are commonly used to test the compressive strength of concrete, quantity control, material research, structural analysis, field testing, durable study, casting of columns and posts, and to fills Sonotube, Sonopipe, Quik-tube and Form-tube.

The unit weight of concrete or density is ratio of unit mass to volume. The specific weight or density of concrete is typically about 150 pounds per cubic foot (lb/ft³), or 2,400 kilograms per cubic meter (kg/m³), or 68 kilograms per cubic foot (kg/ft³).

The concrete formula for the volume of a cylinder is V = (πD²/4)xh, where “V” is the volume, “π” is pi (approximately 3.14), “D” is the Diameter of the base, and “h” is the height of the cylinder. Multiply the volume by the density of concrete, typically 150 lb/ft³ (2,400 kg/m³), to find the weight of your required concrete volume.

**If a concrete cylinder has diameter of 18 inches and 4 feet in height, here are the steps to calculate the volume of a concrete cylinder:**

1. Estimate Area of base of cylinder: Use the formula Area = π D2/4, like area = (3.14 x 1.5 x 1.5)/4 = 1.77

2. Estimate cubic feet of concrete cylinder: Use the formula Volume = Area x H, like volume = 1.77 × 4 = 7 cubic feet

3. Estimate weight of concrete cylinder: Use the formula, weight = volume × density, like weight of concrete cylinder = 68 x 7 = 476 kg, or 150 x 7 = 1050 pounds

4. Estimate cubic yards of concrete cylinder: Multiply the cubic feet by 0.037, like cubic yards of concrete = 7 x 0.037 = 0.259 cubic yards.

5. Estimate tons of concrete cylinder: Divide pounds of concrete by 2,000 to find tons of concrete, like 1,050/2,000 = 0.525 US tons.

**Steps to calculate how much concrete do you need to fill a 12 inch cylindrical shape Sonotube are following:-**

1. Convert diameter of Sonotube in feet: Divide 12 inches by 12 to get into feet, like 12/12 = 1 foot

2) Estimate square footage of Sonotube: Area of Sonotube = πD^2/4, where π = 3.14, Diameter (D) = 1 foot, so putting all these value you get Square footage = (3.14 × 1 ×1)/4 = 0.785 square feet

3) Estimate volume of Sonotube in cubic feet: Volume = Square footage × depth in feet. Volume of required concrete to fill a 12 inch Sonotube per foot = 0.785 × 1 = 0.785 cubic feet, so for 4 feet height volume of Sonotube = 0.785× 4 = 3.14 cubic feet

4) Estimate no. of bags of concrete per foot height: No. of 80lb bags of concrete = 0.785/ 0.60 = approx 1.5 bags, or No. of 60lb bags of concrete = 0.785 ÷ 0.45 = approx 2 bags.

5. Estimate no. of bags of concrete for four feet height: No. of 80lb bags of concrete = 3.14/ 0.60 = approx 6 bags, or No. of 60lb bags of concrete = 3.14 ÷ 0.45 = approx 7 bags.

**Conclusions:**

To figure the amount of concrete required for a cylinder you can use the formula: V = (π D2/4)xH. Multiply the volume by the density of concrete, typically 150 lb/ft³ (2,400 kg/m³, or 68 kg/ft³), to find the weight of your required concrete volume.