Free & private

Sunrise & Sunset Time Calculator

Enter coordinates, or use your device's location, and a date to calculate sunrise and sunset times using the standard solar position algorithm.

Location & date

Use your device's location, or enter coordinates manually.

☀Your times will appear hereAdd a location and date, then calculate.
Sunrise--
Sunset--

Times are calculated in UTC using the standard solar algorithm. The local estimate uses your longitude to guess a whole-hour time zone offset and does not account for daylight-saving time or actual time zone boundaries — check a time zone map for your exact local time.

How to use the sunrise & sunset calculator

This free tool calculates sunrise and sunset times for any place and date using latitude, longitude and a well-known solar position formula. Calculations run entirely in your browser, and your location is never uploaded or stored.

1. Set a location

Select "Use my location" for GPS coordinates, or type latitude and longitude manually.

2. Pick a date

It defaults to today, but you can check any date, past or future.

3. Read both times

See sunrise and sunset in UTC, plus an approximate local clock time.

Understanding the calculation

This calculator implements the Sunrise/Sunset Algorithm published in the Almanac for Computers (1990), the same formula behind many popular sunrise-sunset tools. It uses a zenith angle of 90.833°, which accounts for both atmospheric refraction and the sun's apparent disk size, matching the commonly used definition of sunrise and sunset.

Why UTC first

The formula naturally produces a time in Coordinated Universal Time, independent of any time zone database.

Approximate local time

Local time is estimated by rounding longitude ÷ 15 to the nearest hour — a rough zone guess, not an authoritative lookup.

Polar edge cases

Near the poles, the sun can stay up or stay down all day depending on the season; the tool detects and reports this.

What algorithm does this calculator use?

It implements the well-known Sunrise/Sunset Algorithm from the Almanac for Computers (1990), the same formula used by many popular sunrise-sunset calculators, using a zenith angle of 90.833° to account for atmospheric refraction and the sun's apparent size.

Why does it show both a UTC time and an approximate local time?

The algorithm calculates sunrise and sunset in Coordinated Universal Time (UTC). Since this tool does not look up your location's actual time zone or daylight-saving rules, it also offers a rough local estimate based on your longitude, clearly labeled as approximate.

What happens near the poles?

In some seasons, locations near the poles experience continuous daylight ("midnight sun") or continuous darkness ("polar night"). When the math detects one of these cases, the tool shows a clear message instead of a time.

Can I use my current location automatically?

Yes, if your browser supports and allows geolocation. Select "Use my location" and grant permission, or enter latitude and longitude manually at any time.

Try another free tool: Moon Phase Viewer, Clock, or Worry Time Scheduler. Browse all online tools.