Light Travel Time Calculator
Estimate how long light takes to traverse a distance in kilometers.
CalcSimpler Examples
- 299,792.458 km ⇒ 1 s
- 384,400 km ⇒ 1.28 s
FAQ
What speed is used?
The speed of light in vacuum, 299,792.458 km/s.
Does medium affect the result?
The calculator assumes a vacuum; other media slow light slightly.
Additional Information
- Result unit: s
CalcSimpler