Local Solar Noon Calculator
Find the approximate time of solar noon — when the sun is at its highest point in the sky — for any longitude.
Solar noon — the moment the sun reaches its highest point in the sky for the day — is a genuinely different thing from clock noon, and the gap between them can be substantial, sometimes well over an hour, depending on how far your location sits from the center of your time zone and, to a smaller degree, a seasonal variation called the equation of time caused by the tilt and shape of Earth's orbit.
Time zones exist specifically to avoid every location needing its own local solar-time clock — without them, adjacent towns even a short distance apart would technically have different "correct" times — but that convenience comes at the cost of clock noon rarely lining up exactly with true solar noon anywhere except at the specific longitude a time zone happens to be centered on.
This tool estimates solar noon based purely on longitude, which captures the primary effect — the further you are from your time zone's reference meridian, the more clock noon and solar noon diverge — while intentionally leaving out the smaller, seasonally varying equation-of-time correction, which shifts the true result by up to about fifteen minutes depending on the time of year. It's a solid general estimate rather than a precision astronomical calculation.
- Enter a longitude.
- Press Calculate.
- See the approximate solar noon time in UTC.
It ignores the 'equation of time,' a seasonal variation of up to about 15 minutes caused by Earth's elliptical orbit and axial tilt — good enough for general reference, not precision astronomy.
No — solar noon time depends only on longitude; latitude affects sunrise/sunset times and day length, which is what the Sunrise & Sunset Calculator covers.