Sunset Calculator

Estimate the sunset time for any location and date on Earth.

Input Parameters

Latitude

Longitude

Date

Timezone Offset (UTC)

Calculation Results

Calculating...

About this calculator

Quick Reference

φLatitude

λLongitude

δSun Declination

hHour Angle

Overview

Sunset is the moment when the upper limb of the Sun disappears below the horizon in the evening.

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Pro Tips

Latitude is positive for North, negative for South.
Longitude is positive for East, negative for West.
Atmospheric conditions can cause the sun to appear lower or higher than its geometric position.

Fun Facts

"Sunset happens later as you go up in altitude; for every 100 meters, you get about another minute of daylight."
"The sun appears larger at sunset due to an optical illusion called the 'Moon Illusion' (though it applies to the Sun too)."
"During sunset, shorter wavelengths of light (blue and violet) are scattered, leaving longer wavelengths (red and orange) to reach our eyes."

Formula: Sunrise Equation (Sunset Variant)