Sunrise, Sunset & Solar Noon Astronomical Calculator
Processed in your browser
Calculate precise astronomical sunrise, sunset, solar noon, dawn, and dusk for any global coordinates.
Sunrise
06:45 AM
Solar Noon
12:58 PM
Sunset
06:12 PM
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Direct In-Browser Handoff
Date Duration & Calendar Math Pipeline
Chain this tool with complementary private browser utilities for a complete zero-server workflow:
Helpful Examples
London Sunrise & Sunset
Solar times for Lat 51.5°, Lon -0.12°
Lat: 51.5, Lon: -0.12How to Use the Sunrise, Sunset & Solar Noon Astronomical Calculator
Compute solar ephemeris and diurnal astronomical times from geographic coordinates and calendar date. Calculates Solar Noon, Sunrise, Sunset, and Civil Twilight hours directly in-browser.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
How is sunrise calculated?
Sunrise is defined as the moment the upper limb of the Sun appears above the sea-level horizon, accounting for atmospheric refraction (-0.833° solar zenith angle).
Does this tool work offline?
Yes. Solar celestial mechanics equations are evaluated 100% in client-side JavaScript without external weather or map APIs.
Related Utilities
Frequently paired browser tools in Date & Time Tools