Online Calculator to Find Lightning Distance

Calculate your approximate distance from lightning with this Lightning Distance Calculator.

Air Temperature: in Fahrenheit

Fill in the temperature and amount of elapsed time from the moment you see a flash to the moment you hear the thunder.

How can thunder tell me the distance of lightning?

Thunder is the sound made by lightning.

This calculator will approximate the distance you are from a lightning
strike based on how many seconds it takes from the time you see the flash to the time you hear the thunder.

This calculator uses the speed of sound to calculate the distance. This speed varies slightly based on the density of the air. Temperature has a strong affect on air density.

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