Sunrise Sunset Times
Enter the latitude and longitude for the location of interest, along with the corresponding time zone for that location. This sunrise-sunset calculator finds the times for sunrise, sunset, transit (zenith), dawn and dusk based on latitude and longitude.
Using Boston, MA US for example, enter degrees and minutes as 42° 21' north, 71° 5' west, or use decimal degrees such as 42.35° north, 71.08° west (-71.08 east) and leave the minutes field blank.
Entering coordinates of longitude and latitude
Enter degrees and minutes or degrees only, with positive or negative decimal numbers. You can find and enter latitude position in terms of north and south or positive and negative north. A negative value is negative north or positive south. Likewise you can find and enter longitude position in terms of east and west or positive and negative east.
For example, coordinates for Portland, Oregon US can be expressed and entered as any of the following:
- latitude 45° 31' north and longitude 122° 41' west or
- latitude 45.52° north and longitude 122.68° west or
- latitude 45.52° north and longitude -122.68° east
Find Coordinates for a Geographical Location
Use Google Maps to find your location, for example, Portland, Oregon.
- Right click on the Google map and choose "What's Here?"
- 45.534251,-122.717285 will display in the search box and can be seen when you roll over the marker
- These stand for 45.534251 north and -122.717285 east (or 122.717285 west)
You can also use an online reference to look up latitude 45° 31' north and longitude 122° 41' west. To calculate sunrise and sunset times for Portland, OR you'll need to set the time zone to UTC -08:00.
Time Zone UTC offsets
There are several resources to look up UTC offsets:
References and Additional Reading on Sunrise Sunset Times
Definitions for sunrise, sunset, transit, civil dusk and dawn and other astronomical definitions.
FAA Aviation Weather Cameras Sunrise/Sunset/Twilight Calculator
NOAA.gov National Oceanic and Atmospheric Administration Sunrise/Sunset Calculator
Coordinates of major US and world cities in degrees and minutes