🌅 Golden Hour & Blue Hour Photography Lighting Calculator
Calculate morning and evening Golden Hour and Blue Hour natural light windows from local sunrise and sunset times for portraits and landscape photography.
What Golden Hour & Blue Hour Photography Lighting Calculator Does
Golden hour is not an hour. It is a band of sun elevation — roughly −4° to +6° — and how long the sun takes to cross that band depends entirely on where you are and what time of year it is. Measured on 21 June, evening golden hour runs 44 minutes in Quito, 52 in Cairo, 83 in London, and in Reykjavik the sun never leaves the band at all.
That is why a calculator that adds sixty minutes to sunset is wrong almost everywhere, and most wrong exactly when photographers care most: high-latitude summer, when the light stays low and warm for hours. This one computes the sun's actual elevation, so the answer changes with latitude and date the way the light does.
The physics is straightforward. Near the equator the sun descends almost perpendicular to the horizon and crosses ten degrees of elevation quickly. Towards the poles it approaches at a shallow angle, tracking sideways as much as down, and takes far longer to cover the same vertical distance. Push far enough and it stops crossing at all.
Blue hour is the band below: between civil twilight at −6° and the bottom of golden hour at −4°. It is short, and it is the window when the sky still holds color while artificial lights read as bright — which is why cityscapes are shot then rather than after dark.
How to Use Golden Hour & Blue Hour Photography Lighting Calculator
- Enter your local sunrise and sunset times (HH:MM)
- Review morning and evening Golden Hour magic light windows
- Inspect morning and evening Blue Hour twilight windows
Formula Used by Golden Hour & Blue Hour Photography Lighting Calculator
Golden hour as an elevation band, not a duration
golden hour = the interval where −4° ≤ sun elevation ≤ +6°; duration depends on d(elevation)/dt, which scales with cos(latitude)
- −4° to +6°
- the usual photographic convention; you will see slightly different bounds elsewhere
- blue hour
- −6° to −4°, between civil twilight and golden hour
- rate of descent
- the sun drops 15° an hour at the equator and far more slowly at high latitude
Worked example
Evening golden hour on 21 June, at four latitudes.
- Quito, 0.2° S — the sun descends steeply: 44 minutes
- Cairo, 30.0° N — 52 minutes
- London, 51.5° N — 83 minutes
- Reykjavik, 64.1° N — the sun stays inside the band
Result: A fixed sixty minutes is 36% too long in Quito, 28% too short in London, and meaningless in Reykjavik.
How long golden hour actually lasts
Evening golden hour, computed from sun elevation. Note that London’s longest golden hour is in December, not June — in winter the sun tracks along the horizon rather than dropping through it.
| Place | 21 March | 21 June | 21 December |
|---|---|---|---|
| Quito, 0.2° S | 40 min | 44 min | 44 min |
| Cairo, 30.0° N | 46 min | 52 min | 52 min |
| London, 51.5° N | 64 min | 83 min | 87 min |
| Reykjavik, 64.1° N | 92 min | Sun stays in the band | Sun stays in the band |
The four light windows
| Window | Sun elevation | What it is good for |
|---|---|---|
| Blue hour, morning | −6° to −4° | Cool even light; city lights still balance the sky |
| Golden hour, morning | −4° to +6° | Warm, low, long shadows; front and side light |
| Golden hour, evening | +6° to −4° | The same, mirrored — usually warmer from atmospheric dust |
| Blue hour, evening | −4° to −6° | Cityscapes and architecture, before the sky goes black |
How to Read Your Result
Plan by elevation, not by clock
If a shot depends on a particular quality of light, the useful number is where the sun will be, not how long after sunset it is. This is why the same "one hour before sunset" advice produces beautiful results in Scotland in June and misses entirely in Singapore, where the whole window is over in three quarters of an hour.
Near the poles the concept stops applying
Inside the polar circles in summer the sun can circle the sky without leaving the golden band, giving hours of low warm light — the reason so much landscape photography happens in Iceland and Norway in June. In winter the same latitudes never get the sun into the band at all.
The sky matters more than the minutes
These are astronomical bounds under a clear sky. Cloud, haze, dust and pollution change the actual color and intensity far more than a few minutes either way — a thin high cloud deck can extend usable warm light well past the calculated end, and a bank on the horizon can end it early.
Terrain moves the whole window
The calculation assumes a flat sea-level horizon. In a valley the sun disappears behind a ridge while still well above the astronomical horizon, ending golden hour early; from a summit it lasts longer than calculated. Check the actual skyline for the spot you are shooting from.
Limitations & Accuracy Notes
- The −4° to +6° and −6° to −4° bounds are photographic convention, not a standard. Other sources use slightly different numbers.
- Clear-sky, flat-horizon assumption. Terrain and weather both dominate in practice.
- Times are astronomical bounds, not a prediction that the light will be good.
- Accurate to about a minute in the mid-latitudes, less so near the poles where the sun approaches the horizon at a shallow angle.
- The bundled city list is curated; coordinates can be entered directly for anywhere else.
Frequently Asked Questions
What is Golden Hour in photography?
What is Blue Hour?
What exactly is the golden hour?
How is blue hour different?
Does golden hour really last an hour?
Does this account for hills or buildings?
Why do the times shift so much through the year?
Is my location stored?
References & Further Reading
- NOAA Global Monitoring Laboratory — solar calculator — The solar position equations the elevation bands are computed from