This light travel time reference table shows the light travel time for a range of distance values. Every figure is computed with the same engine that powers our Light Travel Time Calculator, so the numbers are exact.
| Distance | Light travel time | In seconds |
|---|---|---|
| 37,000,000 km | 2.06 | 123.4 |
| 75,000,000 km | 4.17 | 250.2 |
| 110,000,000 km | 6.12 | 366.9 |
| 150,000,000 km | 8.34 | 500.3 |
| 220,000,000 km | 12.23 | 733.8 |
| 300,000,000 km | 16.68 | 1,000.7 |
| 450,000,000 km | 25.02 | 1,501.0 |
| 750,000,000 km | 41.70 | 2,501.7 |
| 1,000,000,000 km | 55.59 | 3,335.6 |
| 1,500,000,000 km | 83.39 | 5,003.5 |
How to use this table
Find the row closest to your distance and read across to the light travel time. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Light Travel Time Calculator for a precise answer.
Need a value that is not in the table? — the Light Travel Time Calculator does it instantly, for free, with the formula and a worked example built in.
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