OneTaskSun Calculators
Sunrise, Sunset, Twilight, Solar Noon, Golden and Blue Hour Calculators
Free sun calculators that give sunrise, sunset, solar noon, day length and the three twilights for any latitude, longitude and date, plus the golden and blue hours photographers plan around.
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Every Sun and Daylight tool
How the times are worked out
The calculators use the NOAA solar position equations, which are accurate to about a minute for ordinary latitudes. Sunrise and sunset are the moments the top of the sun touches a flat horizon, allowing for atmospheric refraction.
What changes the real view
Hills, buildings and sea level all shift what you see. A valley can lose the sun half an hour before the calculated sunset, while a mountain summit sees it a few minutes later. Treat the times as the astronomical answer and allow a margin on location, especially when planning landscape photography.
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