Sunrise Sunset Calculator: Estimate the Day's Light
Sunrise and sunset follow from three things: where you are, what day it is, and how the Sun's path tilts through the year. This tool turns those into times.
What is the Sunrise Sunset Calculator?
Enter a latitude, longitude, and date, and the tool estimates sunrise and sunset with a standard solar calculation: the Sun's declination for the day, the hour angle at the horizon, and the equation of time. Results are estimates — they ignore hills, buildings, and local weather, and they are given in UTC, so add your local offset.
How to use it
- Enter the latitude and longitude.
- Enter the date.
- Click Calculate Sunrise and Sunset and add your local offset to the UTC times.
Worked example
At 51.5 degrees north on 21 June 2026, sunrise is estimated at 03:49 UTC and sunset at 20:14 UTC, giving a day of about 16.4 hours.
Are these times exact?
No. They are estimates that ignore hills, buildings, and weather, and they are given in UTC, so you must add your local offset.
Frequently asked questions
Why is the longest day in June in the northern hemisphere?
Because the northern hemisphere tilts most toward the Sun around 21 June, so the Sun stays up longest.
What is polar night?
When the Sun never rises at all, which happens near the poles in winter. The tool reports it instead of inventing a time.