Agricultural Spray Drone Calculator

Calculate spray coverage, chemical usage, and mission time for agricultural spraying drones based on tank capacity, application rate, and field size.

Tank capacity (L)

Application rate (L/acre)

Field area (acres)

Ground speed (mph)

Swath width (ft)

Chemical cost ($/L)

Battery flight time (min)

Nozzle count

Tab to move between fields

Acres per tank load

Tank loads needed8

Total chemical (L)80

Chemical cost ($)$400.00

Acres per hour18.18

Spray time per load (min)12

Total spray time (min)132

Battery swaps11

Total mission time (min)194

Flow rate per nozzle (L/min)0.21

How to Use This Calculator

Enter tank capacity (L), application rate (L/acre), and total field area (acres).
Set ground speed (mph), swath width (ft), and nozzle count for your spray drone.
Enter chemical cost per liter and battery flight time (min) per charge.
Review acres per tank load, total tank loads needed, chemical cost, and acres covered per hour.
Check total mission time and battery swaps needed, then compare the calculated application rate to your agronomist's prescribed rate for the target crop.

How the result changes with Application rate (L/acre)

Tank capacity (L): Spray tank volume in liters (e.g., DJI Agras T40 = 40 L).
Application rate (L/acre): Chemical application rate in liters per acre. Typical range 0.5-5 L/acre for ULV spraying.
Field area (acres): Total field area to be sprayed.
Ground speed (mph): Drone ground speed during spraying. Typical 8-15 mph.
Swath width (ft): Effective spray swath width from all nozzles. Depends on nozzle spacing and flight height.
Chemical cost ($/L): Cost of spray chemical per liter.
Battery flight time (min): Flight time per battery under spray load. Typically 8-15 min.
Nozzle count: Number of spray nozzles on the drone.

Acres per tank load: How many acres one full tank can cover.
Tank loads needed: Total refills required to spray the entire field.
Total chemical (L): Total volume of spray chemical needed.
Chemical cost ($): Total cost of spray chemicals for the field.
Acres per hour: Spray coverage rate based on speed and swath width.
Spray time per load (min): Effective spraying time limited by battery or tank volume.
Total spray time (min): Total active spraying time for the entire field.
Battery swaps: Number of battery changes needed during the mission.
Total mission time (min): Total time including spraying, reloading, and battery swaps.
Flow rate per nozzle (L/min): Required flow rate per nozzle to empty the tank within one battery cycle.

Identify Input Parameters
4 parameters
Tank capacity (L) = 10, Application rate (L/acre) = 2, Field area (acres) = 40, Ground speed (mph) = 10 = 8 input(s) provided
Calculate Acres per tank load
Acres per tank load = tankCapacityL / applicationRateLPerAcre
5 = 5
Calculate Tank loads needed
Tank loads needed
8 = 8
Calculate Total chemical
Total chemical = fieldAreaAcres * applicationRateLPerAcre
80 = 80