Sun & Moon
Twilight Calculator
Estimate civil, nautical, and astronomical twilight times from latitude and longitude.
Open the tool to see results.
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How this tool works
Twilight estimates use simplified solar depression angles and do not include local terrain.
All calculations run in your browser. No account is required, and this static version does not store your inputs.
What are the twilight types?
Civil, nautical, and astronomical twilight use different sun depression angles below the horizon.