💡 Light Travel Time
Light is fast, but space is bigger. Find how long light takes to cross any distance.
Results
- Light travel time
- 1.28222 seconds
- In minutes
- 0.0213703
- In hours
- 0.000356172
- In years
- 4.0631e-8
How it works
t = distance / c, where c = 299,792.458 km/s
Nothing travels faster than light in a vacuum. Even so, sunlight takes about 8 minutes 20 seconds to reach Earth, and over 22 hours to reach Voyager 1. When you look at distant objects, you look back in time.
Assumptions: Travel through vacuum at c. Example distances are averages, not live positions.
Reference: CODATA speed of light; NASA