Calculating your distance to lightning is straightforward once you know the Thunder Distance formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Thunder Distance Calculator.
What is Thunder Distance?
The Thunder Distance calculation tells you your distance to lightning from a few simple inputs. The figure you are solving for here is the distance to lightning.
The Thunder Distance formula
The core formula is:
Distance to lightning = Seconds between flash and thunder × 0.343Here is what each input means:
- Seconds between flash and thunder — a number. Example: 5.
How to calculate it step by step
- Write down the seconds between flash and thunder (for example, 5).
- Apply the formula above to get your distance to lightning.
- Double-check the result with the Thunder Distance Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Seconds between flash and thunder | 5 |
| Distance to lightning | 1.715 |
| In metres | 1,715 |
With seconds between flash and thunder of 5, the distance to lightning works out to 1.715.
Example 2
With seconds between flash and thunder of 10, the distance to lightning works out to 3.430.
| Result | Value |
|---|---|
| Distance to lightning | 3.430 |
| In metres | 3,430 |
Example 3
With seconds between flash and thunder of 2.5, the distance to lightning works out to 0.858.
| Result | Value |
|---|---|
| Distance to lightning | 0.858 |
| In metres | 858 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Thunder Distance Calculator does it instantly, for free, with the formula and a worked example built in.
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