What is the Sunrise Sunset Calculator?
Calculate sunrise, sunset, solar noon, and day length for any location and date with this free sunrise sunset calculator. Enter latitude, longitude, and UTC offset to get local times using the NOAA solar algorithm. Includes city presets for New York, London, Mumbai, and Sydney. Runs entirely in your browser with no signup.
How to use the Sunrise Sunset Calculator
- Enter latitude and longitude for your location.
- Set the date (year, month, day) and UTC offset (e.g. -4 for EDT, 5.5 for IST).
- Click Calculate to get sunrise, sunset, and solar noon in local time.
- Review day length, declination, and equation of time.
- Copy results or use city presets for quick examples.
Common use cases
- Planning outdoor photography around golden hour in New York
- Finding day length on the summer solstice for a travel itinerary
- Checking sunrise time in Mumbai for a morning event
Frequently asked questions
- How are sunrise and sunset times calculated?
- This tool uses the NOAA solar calculator algorithm. It computes solar declination and the equation of time from the day of year, then finds the hour angle when the sun's center is at 90.833° zenith (accounting for refraction and solar radius).
- What UTC offset should I use?
- Enter your local timezone offset from UTC in hours. Examples: 0 for GMT, -5 for US Eastern Standard Time, -4 for EDT, +5.5 for India Standard Time, +11 for Australian Eastern Daylight Time.
- Why is longitude important?
- Solar noon occurs when the sun crosses your meridian. Longitude shifts sunrise and sunset times — each 15° of longitude equals about one hour of local solar time difference.
- What happens in polar regions?
- At high latitudes near solstices, the sun may not rise (polar night) or not set (midnight sun). The calculator detects these conditions and reports them.
