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Concrete - DiyCivil-Calc | Cement, Sand & Aggregate Estimator

Beam
Column
Slab
Footing
Lintel
Wastage: 4%

📖 Beam Concrete Example

    Concrete Calculation for Beam (10 ft × 9 in × 18 in) – With Density & Mix Ratios

    1. Convert All Dimensions Into Feet

    • Length = 10 ft
    • Width = 9 in ÷ 12 = 0.75 ft
    • Depth = 18 in ÷ 12 = 1.5 ft

    2. Wet Concrete Volume

    Wet Volume = Length × Width × Depth

    = 10 ft × 0.75 ft × 1.5 ft
    = 11.25 cubic feet (0.318 m³)

    3. Dry Concrete Volume

    Standard concrete dry factor = 1.54

    Dry Volume = 11.25 × 1.54 = 17.33 cu.ft (0.491 m³)

    4. Material Densities Used

    • Cement: 1440 kg/m³
    • Sand: 1600 kg/m³
    • Aggregate: 1500 kg/m³

    5. Mix Ratio Used for Detailed Calculation (M20 – 1:1.5:3)

    Total parts = 5.5

    Cement

    • Volume = (1 / 5.5) × 17.33 = 3.15 cu.ft
    • Volume in m³ = 0.0892 m³
    • Weight = 0.0892 × 1440 = 128.45 kg
    • 50-kg bags = 3 bags

    Sand

    • Volume = 4.72 cu.ft
    • Volume in m³ = 0.1336 m³

    Aggregate

    • Volume = 9.45 cu.ft
    • Volume in m³ = 0.267 m³

    6. Final Material Summary (M20 Mix) with 4 percent wastage

    • Wet Concrete: 11.25 cu.ft (0.318 m³)
    • Dry Concrete: 17.33 cu.ft (0.491 m³)
    • Cement: 3 bags (128 kg)
    • Sand: 4.91 cu.ft (0.1391 m³)
    • Aggregate: 9.83 cu.ft (0.278 m³)

    7. Other Popular Concrete Mix Ratios

    M7.5 (1:4:8)

    • Total parts = 13
    • Cement = 7.69%
    • Sand = 30.77%
    • Aggregate = 61.54%

    M10 (1:3:6)

    • Total parts = 10
    • Cement = 10%
    • Sand = 30%
    • Aggregate = 60%

    M15 (1:2:4)

    • Total parts = 7
    • Cement = 14.28%
    • Sand = 28.57%
    • Aggregate = 57.14%

    M20 (1:1.5:3)

    • Total parts = 5.5
    • Cement = 18.18%
    • Sand = 27.27%
    • Aggregate = 54.54%

    M25 (1:1:2)

    • Total parts = 4
    • Cement = 25%
    • Sand = 25%
    • Aggregate = 50%

Note: Beam concrete typically uses M20 or M25 grade with proper reinforcement.