This thunder distance reference table shows the distance to lightning for a range of seconds between flash and thunder values. Every figure is computed with the same engine that powers our Thunder Distance Calculator, so the numbers are exact.
| Seconds between flash and thunder | Distance to lightning | In metres |
|---|---|---|
| 1.3 | 0.446 | 446 |
| 2.5 | 0.858 | 858 |
| 3.8 | 1.303 | 1,303 |
| 5 | 1.715 | 1,715 |
| 7.5 | 2.573 | 2,573 |
| 10 | 3.430 | 3,430 |
| 15 | 5.145 | 5,145 |
| 25 | 8.575 | 8,575 |
| 35 | 12.005 | 12,005 |
| 50 | 17.150 | 17,150 |
How to use this table
Find the row closest to your seconds between flash and thunder and read across to the distance to lightning. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Thunder Distance Calculator for a precise answer.
Need a value that is not in the table? — the Thunder Distance Calculator does it instantly, for free, with the formula and a worked example built in.
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