Skip to main content
Calcimator

Fireworks Display Calculator

Shell count and timing for pyrotechnic show duration.

Inputs

%

Results

Total Shells

78

Safety Radius (ft)

280

Main Body Shells51
Finale Shells27
Safety Radius (m)85
Burst Altitude (ft)400
Shells Cost ($)$1,950.00
Total Budget ($)$2,496.00
Noise at 500 ft (dB)114
How to Use This Calculator
  1. Enter the total show duration in minutes and the shell size in inches.
  2. Set the shells-per-minute firing rate and the percentage of show time devoted to the finale.
  3. Input the average cost per shell for your budget estimate.
  4. Review total shell count, NFPA 1123 safety radius in feet, and approximate burst altitude.
  5. Use the total budget output (shells + setup + insurance) for event permitting and planning.

How the result changes with Show Duration (min)

Show Duration (min)Total ShellsSafety Radius (ft)
6.935280
22115280
39203280
54281280

What each input means

Show Duration (min)
Total display time in minutes.
Shell Size (inches)
Diameter of shells. Larger = higher altitude, bigger safety zone.
Shells per Minute
Base firing rate during main body (finale fires 3x faster).
Finale Duration (%)
Percentage of show time devoted to the finale.
Cost per Shell ($)
Average cost per shell. 3": $10-20, 6": $50-100, 12": $200-500.

What each result means

Total Shells
Total number of shells for the entire show.
Main Body Shells
Shells during the main portion.
Finale Shells
Shells during the finale (3x firing rate).
Safety Radius (ft)
NFPA 1123 minimum spectator distance.
Safety Radius (m)
Safety perimeter in meters.
Burst Altitude (ft)
Approximate maximum burst height.
Shells Cost ($)
Cost for shells alone.
Total Budget ($)
Shells + setup labor + insurance.
Noise at 500 ft (dB)
Estimated noise level at 500 feet.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Show Duration (min) = 15, Shell Size (inches) = 4, Shells per Minute = 4, Finale Duration (%) = 15 = 5 input(s) provided
  2. Calculate Total Shells
    Total Shells
    78 = 78
  3. Calculate Safety Radius
    Safety Radius = 70 * shellSizeIn
    280 = 280
  4. Calculate Main Body Shells
    Main Body Shells
    51 = 51
  5. Calculate Finale Shells
    Finale Shells
    27 = 27

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Signage & Display

Trade Show Banner Calculator

Size and price trade show banners including retractable, hanging, and backdrop options based on booth dimensions.

Event Planning

Event Budget Calculator

Break down your total event budget into recommended allocations for venue, catering, decor, photography, and more.

Event Planning

Seating Layout Calculator

Calculate how many tables and guests fit in your venue based on room dimensions, table type, and aisle spacing.

Event Planning

Catering Quantity Calculator

Estimate how much food and drink you need for your event based on guest count, meal type, and number of courses.

More in Life Events, Faith & Community.