// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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sci.thunderstorm-distance Calculator
Calculates distance to a lightning strike from thunder delay: distance = 343 m/s × time. Every 3 seconds of thunder delay corresponds to ~1 km — the rule-of-thumb 3 s/km allows rapid safety decisions about taking shelter.
Inputs
Seconds After Lightning
Reference formula or conversion factor shown for context.
Results
distance to lightning (km)
The computed distance or separation.
distance (miles)
The computed distance or separation.
distance (m)
The computed distance or separation.
speed of sound at 20°C
The computed rate of movement or processing.
rule of thumb
A widely used practical approximation or heuristic for this field — useful for quick estimates but not a substitute for rigorous calculation.
safe shelter
Reference formula or conversion factor shown for context.