Lightning Distance Calculator

Enter the total number of seconds between a flash of lightning and when you hear the thunder. The calculator will determine the distance away the lightning strike occurred.

Lightning Distance Formula

The following equation can be used to calculate how far away a storm is.

D = T * SS

  • Where D is the distance
  • T is the time in seconds
  • SS is the speed of sound

FAQ

How far away is a storm?

The distance a storm is away from you can be calculated by counting the number of seconds it takes to hear thunder associated with lightning. The reason this is possible is because light will reach you almost instantly, but the sound will take longer. Using the difference you can calculate how far away the storm is.

What is the speed of sound?

Sounds travels at about 343 m/s in air, which is equal to around .212 miles per second.

lightning distance calculator

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