Tool description

The Sunset Calculator helps you determine the accurate sunset time at any location on Earth. Whether you need to find the sunset time for my location using automatic detection or calculate sunset time by latitude and longitude coordinates, this sundown time calculator provides precise results. Find out when does the sun go down tomorrow or any date in the future, with automatic timezone adjustments for your geographical position.

Features

  • Automatic Location Detection: Get sunset time for my location instantly using browser geolocation
  • Manual Coordinate Input: Calculate sunset time by latitude and longitude for any place worldwide
  • Date Selection: Find when does the sun go down tomorrow, today, or any date in the past or future

What is Sunset?

Sunset is the daily disappearance of the Sun below the horizon due to Earth's rotation. The sunset period consists of two distinct phases:

  • Sunset Start: When the Sun begins to touch the horizon and the sky starts changing colors
  • Sunset End: When the Sun completely disappears below the horizon

The duration between these two events varies based on latitude, season, and atmospheric conditions. Near the equator, sunsets are typically shorter (around 2-3 minutes), while at higher latitudes, they can last significantly longer (up to 30 minutes or more).

Calculation Details

This sundown time calculator uses the SunCalc library which implements astronomical algorithms to provide accurate sunset time calculations. The tool accounts for multiple factors to determine sunset time by latitude and longitude:

  • Earth's Axial Tilt: The 23.5-degree tilt affecting seasonal variations in sunset time
  • Atmospheric Refraction: Light bending through Earth's atmosphere
  • Observer's Position: Precise latitude and longitude coordinates for location-specific results
  • Date and Time: Accounting for Earth's position in its orbit when calculating when does the sun go down
  • Timezone: Automatically adjusting results to deliver accurate sunset time for my location

Whether you need to find sunset time for my location today or calculate sunset time by latitude for any coordinates worldwide, the calculations are performed with high precision suitable for photography, event planning, and astronomical observations.