Sunset Calculator
Approximate local-solar-time sunset
How to Use This Calculator
Enter latitude and day of year. The result is an approximate local solar time sunset.
Formula
H₀ = arccos(-tan φ · tan δ)
Sunset ≈ 12 + (H₀·180/π) / 15
Frequently Asked Questions
Why local solar time?
Clock time conversion depends on longitude, timezone and equation of time; this tool outputs solar time only.