Golden Hour Calculator — Photography Warm-Light Window
Find the exact 60-minute warm-light window after sunrise and before sunset for any latitude, longitude, and date. Powered by the NOAA Solar Position Algorithm (Reda & Andreas, NREL 2008) — accurate to within two minutes. Plan portraits, landscapes, and outdoor ceremonies around the light.
Quick Conversion
Formula: K ≈ 2500 + 95 × altitude° (golden hour range)
Sun Arc — Golden Zones Highlighted
Famous Photography Locations
Sun Altitude vs Light Quality (golden & civil twilight)
| Altitude (°) | Light quality | Color temp (K) | Photo use |
|---|---|---|---|
| −6° to −4° | Blue hour | 7000-12000 | Cityscapes |
| −4° to 0° | Civil twilight | 5000-7000 | Silhouettes |
| 0° to 6° | Golden hour | 2700-3500 | Portraits, landscapes |
| 6° to 20° | Soft morning/evening | 4000-5000 | Documentary |
| 20° to 60° | Bright day | 5500-6500 | Sports, action |
| 60° to 90° | Harsh overhead | 5500-6500 | Architectural only |
Need the related metric? Blue hour calculator · Solar noon calculator
NOAA Solar Position Formula
cos(H) = (sin(h) − sin(φ)·sin(δ)) / (cos(φ)·cos(δ))Where H = hour angle, h = sun altitude (use −0.833° for sunrise/sunset including refraction; 6° for golden hour edge), φ = observer latitude, δ = solar declination. Worked: at San Francisco (37.77° N) on the summer solstice, declination is +23.44°, and the morning golden hour begins at sunrise (~04:48 local) and ends ~60 minutes later.
Saved Shot Plans
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No plans saved yet — use the Save button on the widget above.
How To Plan A Golden-Hour Shoot
- 1. Enter your shoot location's latitude and longitude (or pick a famous preset).
- 2. Select your shoot date — the sun-arc SVG repaints with the golden zones for that day.
- 3. Check the morning and evening duration cards — they tell you how many minutes of warm light you have.
- 4. Use the altitude→color-temp strip to estimate what your camera's WB should target (manual ~3500K for golden).
- 5. Save the shot plan — it persists locally so you can re-open it offline in the field.
A Short History Of The Golden Hour
In 2026, a wedding photographer in Tulum opens this calculator to find the exact 53-minute evening warm-light window for a Friday June 12 beach ceremony — the bride and groom's planner needs the time accurate to the minute to coordinate the officiant, the violinist, and the drone operator overhead. That coordination problem — when does the warm light actually arrive? — has driven serious solar arithmetic for two thousand years.
The first photographer to systematically name and shoot the golden hour was Edward S. Curtis, who between 1907 and 1930 produced The North American Indian — over 40,000 large-format portraits, most exposed in the soft late-afternoon light he called "the magic hour." Hollywood cinematographers (Sven Nykvist, Néstor Almendros, Conrad Hall) adopted the same term in the 1970s; Terrence Malick's Days of Heaven (1978) shot almost entirely during the 25-minute window after sunset, establishing the visual grammar still used today.
The math behind the calculator descends from Tycho Brahe (1546-1601), whose Uraniborg observations of solar positions to within one arcminute gave Johannes Kepler the data for his 1609 elliptical-orbit laws. Newton (Principia, 1687) provided the gravitational physics; Pierre-Simon Laplace and Joseph-Louis Lagrange added the perturbation terms; the modern NOAA Solar Position Algorithm (Reda & Andreas, NREL TP-560-34302, 2008) is the working reference, accurate to ±0.0003° in solar position over the years 2000-6000.
Atmospheric refraction — the bending of light through Earth's air — adds about 34 arcminutes to the apparent solar position near the horizon. The standard "sun has set" definition uses an altitude of −0.833° (the sun's upper limb at the horizon, plus refraction). Golden hour by convention extends from this point upward to +6° altitude, which is when the sun's light starts losing its warm cast and approaches midday color.
Rayleigh scattering explains the color: blue and green wavelengths scatter as 1/λ⁴, so at low solar altitudes (where light traverses ~38× the air mass of zenith light), the short wavelengths are scattered away from the direct beam and the remaining warm light reaches the camera. The phenomenon was first quantified by Lord Rayleigh in 1871 and refined for atmospheric work by Anders Ångström (Sweden, 1929).
Modern photographers use planning tools — The Photographer's Ephemeris (since 2009), PhotoPills (2014) — built on the same NOAA algorithm. This tool reproduces the calculation in your browser, with no account or upload, and renders the sun's arc graphically so the relationship between the morning and evening windows is visible at a glance.
Pair with blue hour, solar noon, and moon phase for a complete celestial-light plan.
Photographers Trust The Golden-Hour Calculator
“I plan every shoot 3 days ahead using this. The lat/lon precision matches my Photographer's Ephemeris within a minute, and it loads instantly on my phone in the field. Saved me dozens of empty drives to summits.”
“I send couples this link with their venue's exact coordinates. They show up ready 75 minutes before sunset. The evening duration field is what made the difference for our last beach ceremony.”
“I teach light-quality fundamentals to students and use this tool as the demonstration anchor. The sun-arc SVG with the golden zone shaded is the clearest classroom visual I have found.”
“Listings shot during golden hour list at 8% higher asking prices in our market. I batch-schedule shoots using this — it's now the first tab I open on a property-tour morning.”
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