Tool description

The Sunrise Calculator app is a precise astronomical tool that calculates sunrise times for any location on Earth. Using your geographic coordinates (latitude and longitude) and a specific date, it determines when the sun will rise and how long the sunrise period will last. Calculate future sunrise times for any date, past or present, with automatic location detection or manual coordinate input for any place in the world.

Features

  • Automatic Location Detection: Uses your device's geolocation to automatically determine your coordinates

  • Manual Coordinate Input: Enter specific latitude and longitude values for any location worldwide

  • Date Selection: Calculate future sunrise times for any date, whether planning days, weeks, or months ahead

What is Sunrise

Sunrise is the moment when the upper edge of the sun appears above the horizon in the morning. The sunrise period spans from when the sun first becomes visible until it is fully above the horizon. This duration varies based on latitude, date, and atmospheric conditions. The tool calculates both the start and end of the sunrise period, giving you complete information about this daily astronomical event.

Calculation Details

The calculator uses the SunCalc library to perform astronomical calculations based on:

  • Geographic Coordinates: Latitude and longitude in decimal degrees

  • Date: The specific day for which to calculate sunrise

  • Timezone: Automatically detected based on your system settings

  • Solar Position Algorithms: Standard astronomical formulas that account for Earth's rotation and orbit

The results show sunrise start time, sunrise end time, and the total duration of the sunrise period in a human-readable format.