This tool calculates solar angle data based on date, time, and location. Please read the important instructions, notes, and FAQ pages before using this tool. Click on any input or output name for additional details.

TIP: While this tool provides rapid and detailed results, if you need to calculate sun angle data for a series of dates and/or times, please check out the SunPosition tool, which outputs tabular solar angle data (suitable, for instance, for importing into spreadsheets). [hide tip]
Lat/Long lookup by USA ZIP Code: [lookup]   [other options]   [hide]

longitude time
latitude time zone
date   time basis
year daylight saving
elevation zero azimuth
altitude angle declination
azimuth angle equation of time
clock time time of sunrise
solar time time of sunset
hour angle

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The development and maintenance of SunAngle is supported by user donations. If you found this tool helpful, please consider making a small donation...this can be done quickly and securely by credit card or PayPal account, using the buttons to the right. Your donations will contribute to improvements to this and other solar design tools. Thank you!

Mailing List

The author maintains a private mailing list of users of the SunAngle suite of solar design tools, and is happy to send you very occasional notices about software upgrades and other items of interest. Such notices do not typically occur more frequently than a few times a year.