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Deterministic astrological timing calculators.
Planetary Hours Calculator
Calculate precise planetary hours based on your exact longitude and latitude.
How the planetary hours calculator works
Planetary hours divide each day into 24 unequal segments, each ruled by one of the seven classical planets: Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn. The calculator above takes your coordinates, finds today’s actual sunrise and sunset for that spot, splits daylight into twelve "day hours" and the night into twelve "night hours", and shows which planet rules the hour you are in right now. That is why it asks for your location: planetary hours today in London are different from planetary hours in Mumbai, and they shift a little every day as daylight lengthens or shortens.
The sequence is older than the seven-day week, and in fact produced it. Starting from the planet that rules the day (Sun on Sunday, Moon on Monday, and so on), the hours cycle through the planets in Chaldean order: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon. The first hour after sunrise always belongs to the day’s ruling planet, and if you follow the cycle for 24 hours you land on the next day’s ruler at the following sunrise. This system, called hora in the Vedic tradition, has been used for electional timing for well over two thousand years.
Reading the results is straightforward. Each planet lends its character to its hour: Mercury hours suit writing, calls, and negotiation; Venus hours suit social plans, art, and matters of the heart; Jupiter hours favor finance, long-term decisions, and anything you want to grow; Mars hours give energy for workouts and difficult confrontations; Saturn hours reward slow, disciplined work; Sun hours support leadership and visibility; Moon hours suit home, family, and emotional conversations. The "optimal for" tags under the current hour summarize this for you.
One honest caveat: planetary hours describe sky-level conditions and are the same for everyone in your city. How strongly a given hour works for you depends on how that planet sits in your own birth chart, which is the part the Vedara app calculates from your birth details.
Frequently asked questions
- What are planetary hours?
- Planetary hours are an ancient timing system that divides the time from sunrise to sunset into twelve segments, and sunset to the next sunrise into twelve more. Each segment is ruled by one of the seven classical planets in a fixed repeating order, and each is considered favorable for activities matching its planet’s nature.
- Which planetary hour is it right now?
- The calculator at the top of this page shows the current planetary hour for your location, including its ruling planet, exact start and end times, and what it is traditionally considered good for. Tap "Use My Location" for the most precise result, since the hours depend on your local sunrise and sunset.
- Why are planetary hours not exactly 60 minutes long?
- Because daylight is divided into twelve equal parts regardless of season. In summer, when days are long, each day hour can run well over 60 minutes while night hours run shorter; in winter the opposite happens. Only around the equinoxes do planetary hours come close to clock hours.
- Are planetary hours the same everywhere?
- No. They depend on local sunrise and sunset, so two cities at different latitudes or longitudes have different schedules for the same date. That is why this calculator asks for your coordinates instead of using one universal table.