How it works
Fill in the 1 field above and Lightning Distance Calculator calculates the result instantly, recalculating as you change any value. It applies the formula distance = seconds × 343 m/s. The math runs locally in your browser — nothing is sent to a server.
Formula
distance = seconds × 343 m/sExamples
- Seconds (flash to thunder) 10 → Distance: 3.43 km
Frequently asked questions
How do I use the Lightning Distance Calculator?
Enter your values in the 1 input field and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
What formula does the Lightning Distance Calculator use?
It uses distance = seconds × 343 m/s. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The Lightning Distance Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Lightning Distance Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on weather & nature and the rest of the platform, you can use it as often as you like.
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