How to Calculate concrete volume

             HOW TO CALCULATE CONCRETE VOLUME

1️⃣ For Rectangular Slab / Footing / Beam

📌 Formula:

$$\mathbf{\text{Volume}}\mathbf{\text{=}}\mathbf{\text{Length}}\mathbf{\text{×}}\mathbf{\text{Width}}\mathbf{\text{×}}\mathbf{\text{Height}}\mathbf{\text{(Thickness)}}$$

If slab size is:

• Length = 20 ft

• Width = 15 ft

• Thickness = 0.5 ft (6 inches)

Calculation:

👉 Volume = 150 cubic feet

If you want in cubic meter:

$$1 \text{ m³ } = 35.3147 \text{ ft³}$$ $$150 ÷ 35.3147 = 4.25 \text{ m³ (approx)}$$

---

2️⃣ For Column (Rectangular)

$$Volume=Length\times Width\times Height$$

Example:

• 1.5 ft × 1 ft × 10 ft
  = 15 ft³

---

3️⃣ For Circular Column / Pile

📌 Formula:

$$Volume=\pi r^{2}h$$

Where:

• r = radius

• h = height

• π = 3.14

---

4️⃣ For Staircase (Rough Method)

$$Volume=(Totallength\times Width\times Averagethickness)$$

---

🔥 Quick Site Tip (Very Important)

After calculating volume:

✔ Add 3%–5% extra for wastage
✔ For PCC, add 5% extra