Free Online Golden Hour Calculator

About the Golden Hour Calculator

Photographers often plan around the golden hour because low-angle sunlight is softer, warmer, and more directional than the harsh light of midday. The effect is caused by a longer atmospheric path: as sunlight travels obliquely through the atmosphere, shorter blue wavelengths are scattered away and longer red and orange wavelengths dominate. The same geometry produces the blue hour on the opposite side of sunrise or sunset, when the Sun is just below the horizon and the sky is lit by indirect scattered light. This calculator finds both windows for any location and date, and plots the Sun's altitude so you can see exactly how the light evolves.

Defining the windows

There is no single official definition of golden hour. A common photographic convention treats it as the period when the Sun's centre is between roughly −4° and +6° relative to the horizon. That range includes the last few minutes before sunrise, the first hour or so after sunrise, and the reverse sequence in the evening. Some photographers prefer a narrower band from 0° to +6°, while cinematographers may extend it to +10° when the atmosphere is hazy. This tool uses the wider −4° to +6° range and clearly separates the golden and blue intervals so you can choose the portion that suits your style.

Blue hour is not a separate phenomenon

The blue hour is simply the deep twilight stage between −6° and −4°. At this point the Sun is below the horizon, so no direct sunlight reaches the ground, but the upper atmosphere is still illuminated. The sky becomes a saturated blue and artificial lights begin to balance with the ambient exposure. Cityscapes and architectural photographs often look best during this interval because windows and street lamps glow against a sky that is not yet black. The blue hour is shorter near the equator and can last much longer at high latitudes.

Why latitude and season matter

The Sun's path across the sky depends on latitude and on the date. Near the equator, the Sun rises and sets steeply, so it passes through the golden band quickly and the window may last only twenty or thirty minutes. At middle and high latitudes the path is shallower, and the same altitude range can persist for an hour or more. In summer inside the polar circles the Sun may never drop below the blue-hour threshold, producing an extended period of twilight rather than a distinct event. The chart on this page makes those differences easy to see.

Planning a shoot

1. Enter the latitude and longitude of the shooting location, not your home address, if they differ.
2. Choose the calendar date and review the morning and evening windows.
3. Arrive early enough to set up before the light peaks; the best colour often lasts only a few minutes.
4. Use the altitude chart to judge how quickly the Sun will move through the band.
5. Check the weather, since clouds can block the horizon even when the calculated window is correct.

Frequently asked questions