About the Golden Hour Calculator
The Golden Hour Calculator is a free photography planning tool that calculates precise golden hour, blue hour, and solar event times for cities around the world. Type in a location and date, and you get the exact window — down to the minute — when the light is at its most photogenic.
We built this tool because most sunrise/sunset apps are designed for general audiences, not photographers. They give you a sunrise time. What photographers actually need is the full picture: when golden hour starts (before the sun appears), when it ends, how long the blue hour runs after sunset, and where solar noon falls for scouting purposes. This calculator gives you all of that in a single calculation.
The Science Behind the Calculations
Our calculations use the NOAA Solar Calculator algorithm — the same underlying mathematics that the U.S. National Oceanic and Atmospheric Administration and the U.S. Naval Observatory use for their official solar position tables. The algorithm computes solar declination (how far north or south the sun sits relative to the celestial equator on a given date) and hour angle (the position of the sun relative to solar noon at a specific longitude) to determine precise sunrise and sunset times for any latitude/longitude pair.
Golden hour is defined as the period when the sun's center is between 0° and 6° above the geometric horizon. Blue hour (civil twilight) is the period when the sun is between 0° and 6° below the horizon. These boundaries are internationally recognized: the International Astronomical Union and the U.S. Naval Observatory both use these definitions in their astronomical almanacs.
Results are accurate to within approximately one minute for most mid-latitude locations under standard atmospheric conditions. The main real-world variables — local terrain blocking the horizon, atmospheric refraction variations due to temperature and pressure, and your elevation above sea level — are not accounted for in the base calculation. For most photography planning purposes, the one-minute accuracy is more than sufficient.
How We Research and Maintain the Tool
Every city's latitude and longitude is sourced from official geographic databases. We cross-reference all city coordinates against NOAA solar position data and independently verified astronomical sources to confirm accuracy. Coordinates are reviewed whenever we add new cities to the calculator.
The calculation code is reviewed each time we update the tool and tested against known solar event data from the USNO Astronomical Applications Department. We document our sources on the tool page and in the golden hour calculator's methodology section.
Who Uses This Tool
Our users range from professional portrait and wedding photographers scheduling client sessions to beginner photographers learning to read natural light. Landscape photographers use it to plan trips to national parks and remote locations. Real estate photographers use it to schedule exterior shoots for a specific facade direction. Videographers planning outdoor productions use it to brief their crews.
We also hear from film photographers — particularly medium format and 35mm shooters — who find the precise window information valuable when managing limited frame counts and fixed-ISO film stocks. And a surprising number of users who are simply curious about when the sky will be beautiful.
Our Photography Blog
Beyond the calculator, our photography blog covers technique, gear, and planning for natural-light shooting. Articles cover everything from camera settings during golden hour to how weather affects light quality to the best locations for golden hour photography in major US cities.
Contact
Found a calculation error? Want to request a new city? Have a question about how the tool works? Reach us by email. We read every message and respond to accuracy reports within a few business days.