Sunset Sunrise Calculator Online | Sun Times & Daylight Hours
Calculate accurate sunrise, sunset, golden hour, and total daylight hours for any location and date worldwide with our online sun calculator. This precision tool uses advanced astronomical algorithms to determine the exact times the sun rises and sets for given dates and geographic coordinates, making it essential for photographers, astronomers, travelers, outdoor event planners, and solar energy professionals.
Calculate the sunrise, sunset, and daylight duration for any location on Earth.
Location
Results
- Sunrise
- N/A
- Sunset
- N/A
- Solar Noon
- N/A
- Day Length
- N/A
Calculations based on astronomical algorithms.
Typical Use Cases
Knowing the exact times of sunrise and sunset is valuable for a wide range of activities and purposes. Photographers use this information to plan shoots during "golden hour" when natural light is most favorable. Astronomers rely on it to schedule observations when the sky is dark enough. Farmers often plan their activities around daylight hours, and solar energy systems are designed based on sunlight availability.
This calculator is also useful for travelers who need to adjust to different daylight patterns in new locations, outdoor event planners who need to know natural lighting conditions, and anyone interested in understanding how daylight varies throughout the year and across different locations on Earth. The tool handles special cases such as polar regions where there can be periods of continuous daylight or darkness depending on the time of year.
Formula
Sunrise/Sunset Algorithm:
1. Convert date to Julian date
2. Calculate solar mean anomaly: M = (357.5291 + 0.98560028 × n) mod 360
3. Calculate equation of center and Sun's true longitude
4. Calculate Sun's declination: sin(δ) = sin(λ) × sin(23.45°)
5. Calculate hour angle: cos(ω) = (sin(-0.83°) - sin(φ)sin(δ))/(cos(φ)cos(δ))
6. Derive sunrise/sunset times from hour angle
- φ: Latitude of the location in radians
- λ: Sun's ecliptic longitude
- δ: Sun's declination
- ω: Hour angle at sunrise/sunset
- n: Julian cycle
- M: Solar mean anomaly