Calculate the total length of night — from sunset to sunrise — for any location and date.
Enter your values below
Your geographic latitude.
Your geographic longitude.
Date to calculate night length for.
How this calculator works
Subtracts the daylight hours from 24 hours to determine the total duration of night.
Common questions about this calculator
These calculators are for informational purposes only. While we strive for accuracy, results should not be used as the sole basis for important decisions.
