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Calcimator

Shotcrete Volume Calculator

Calculate shotcrete volume needed including rebound waste, overspray, weight, and application time estimates.

Inputs

Results

Total Volume to Order (yd³)

7.72

Application Time (hrs)

1.7

Net Volume (yd³)6.17
Rebound Waste (yd³)0.93
Total Weight (tons)15.63
Total Weight (lbs)31,250
Estimated Cost$1,544.00
How to Use This Calculator
  1. Enter the total surface area in sq ft that will receive the shotcrete application.
  2. Set the design thickness in inches as specified by engineering drawings.
  3. Enter the rebound rate (%): 5–15% for wet-mix shotcrete, 15–30% for dry-mix.
  4. Enter the overspray percentage for material lost beyond the target area (typically 5–15%).
  5. Read Total Volume to Order (yd³) — this accounts for rebound and overspray waste added to net volume.
  6. Use Application Time (hrs) to schedule crews and batch plant deliveries.

How the result changes with Surface Area (sq ft)

Surface Area (sq ft)Total Volume to Order (yd³)Application Time (hrs)
10,001154.3434.3
35,001540.14120
65,0001,003.09222.9
90,0001,388.89308.6

What each input means

Surface Area (sq ft)
Total surface area to be covered with shotcrete
Thickness (in)
Design thickness of shotcrete application
Rebound Rate (%)
Material rebound (wet-mix: 5-15%, dry-mix: 15-30%)
Overspray (%)
Material lost to overspray beyond the target area

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Surface Area (sq ft) = 500, Thickness (in) = 4, Rebound Rate (%) = 15, Overspray (%) = 10 = 4 input(s) provided
  2. Calculate Total Volume to Order
    Total Volume to Order
    7.72 = 7.72
  3. Calculate Application Time
    Application Time
    1.7 = 1.7
  4. Calculate Net Volume
    Net Volume
    6.17 = 6.17
  5. Calculate Rebound Waste
    Rebound Waste
    0.93 = 0.93

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

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