About this tool
Compute astronomical, nautical, and civil twilight along with sunrise, sunset, and solar noon for any latitude and longitude on Earth with high astronomical accuracy.
Solar & Twilight Calculator
Calculate exact sunrise, sunset, solar noon, and civil, nautical, and astronomical twilight for any coordinate.
Example
- latitude: 40.7128
- longitude: -74.006
- date: today
Output
EXPLOREWaiting
Run the tool to generate output.
Live data provided bySunrise-Sunset.org(Open Ephemeris Data).Requires attribution link back to sunrise-sunset.org.
When to use this tool
Use Solar & Twilight Calculator for photography planning, astronomy dark sky observation, maritime navigation, or outdoor activity scheduling.
Inputs, Formats & Specifications
- Accepted Inputs
- Latitude (-90° to +90°), Longitude (-180° to +180°), Calendar Date
- Output Formats
- Civil dawn/dusk, Nautical dawn/dusk, Astronomical dawn/dusk, Sunrise, Sunset, Solar Noon, Total Day Length
- Supported Standards
- Decimal coordinates (WGS84), ISO 8601 times, UTC and local offsets
- Browser Limits & Scope
- Assumes standard atmospheric refraction at sea level; high mountain elevations or extreme polar midnight sun/polar night conditions produce continuous twilight.
How to use this tool
- Select a major world city from the preset menu or type custom latitude and longitude coordinates.
- Choose your target date (defaults to today) using the calendar date picker.
- Click Calculate to view solar dawn, sunrise, solar noon, sunset, and dusk phases.
- Review the twilight breakdown card explaining the three official scientific twilight definitions.
Examples
Astrophotography Dark Sky Planning
Determine the exact start and end of astronomical twilight (when the Sun is >18° below the horizon) to photograph the Milky Way in true darkness.
Golden Hour Photo Shoot
Calculate the exact 45-minute golden hour window prior to sunset in Paris or Tokyo for ideal natural lighting.