Search and Rescue Drone Calculator

Calculate search area coverage, mission duration, and detection probability for SAR drone operations based on battery endurance, speed, sensor swath, and search pattern.

Inputs

Flight time per battery (min)

Batteries available

Search speed (mph)

Sensor swath width (ft)

Search pattern (1=Square, 2=Parallel, 3=Sector)

Visibility (miles)

Wind speed (mph)

Terrain factor (0.5-2)

Drones deployed

Battery swap time (min)

Tab to move between fields

Results

Total search area (sq mi)

1.33

Total search area (acres)853.3

Search rate (sq mi/hr)0.67

Total flight time (min)120

Mission duration (min)135

Linear miles searched44

Effective speed (mph)22

Probability of detection (%)63.2%

Visibility penalty (%)0%

Detection radius (ft)100

Pattern NameParallel Track

How to Use This Calculator

Enter battery flight time (min), available battery count, and search cruise speed (mph).
Set sensor swath width (ft) for your camera or thermal imager at planned altitude.
Select search pattern type (square expanding, parallel track, or sector search).
Enter visibility distance (miles) to account for detection range limitations.
Review total searchable area (sq miles and acres), search rate (sq mi/hr), and estimated mission duration.

How the result changes with Search speed (mph)

Search speed (mph)	Total search area (sq mi)
9.5	0.39
21	1.09
34	1.88
46	2.61

What each input means

Flight time per battery (min): Max flight time per battery at search speed.
Batteries available: Total charged batteries available for the mission.
Search speed (mph): Optimal speed for the sensor to detect targets. Slower for visual, faster for thermal.
Sensor swath width (ft): Effective detection width of the camera/thermal sensor at flight altitude.
Search pattern (1=Square, 2=Parallel, 3=Sector): 1 = Expanding square (around POI), 2 = Parallel track (most efficient), 3 = Sector (from last known point).
Visibility (miles): Current visibility conditions. Affects visual detection, not thermal.
Wind speed (mph): Wind reduces effective search speed and battery life.
Terrain factor (0.5-2): 1 = flat/open, 1.5 = hilly/forested, 2 = mountainous. Affects speed and coverage.
Drones deployed: Number of drones searching simultaneously.
Battery swap time (min): Time to land, swap battery, and resume search.

What each result means

Total search area (sq mi): Total area that can be searched with all available batteries and drones.
Total search area (acres): Same coverage area in acres.
Search rate (sq mi/hr): Area coverage rate per drone per hour.
Total flight time (min): Combined flight minutes across all drones.
Mission duration (min): Wall-clock time including battery swaps (drones fly in parallel).
Linear miles searched: Total distance flown across all drones.
Effective speed (mph): Actual search speed after wind and terrain penalties.
Probability of detection (%): Estimated POD assuming target is in the search area (based on coverage factor).
Visibility penalty (%): Detection reduction due to poor visibility (0% = clear conditions).
Detection radius (ft): Maximum distance from flight track the sensor can detect targets.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Flight time per battery (min) = 30, Batteries available = 4, Search speed (mph) = 25, Sensor swath width (ft) = 200 = 10 input(s) provided
Calculate Total search area
Total search area = searchAreaPerDroneSqMi * numberDrones
1.33 = 1.33
Calculate Total search area
Total search area = totalSearchAreaSqMi * 640
853.3 = 853.3
Calculate Search rate
Search rate = effectiveSpeedMph * sensorSwathMi * patternEfficiency
0.667 = 0.667

Engine last updated July 26, 2026.

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