Your Janma Yoga is the Nitya Yoga that was running at the moment of birth. It is the third limb of the Panchang. Add the sidereal longitudes of the Sun and the Moon, wrap the sum at 360°, and cut that circle into 27 equal steps of 13°20′. The step that holds the sum is the yoga of the day - Vishkambha first, Vaidhriti last. That is the whole method. The Janma Yoga calculator runs it on a real birth.
The shared word causes real confusion. This is not a Raja Yoga, and it is not the general idea of a yoga in the Kundli. Those are planetary combinations in a birth chart: kendra lords, trikona lords, named recipes. A Nitya Yoga is a daily Panchang count. It cycles about once a month. Roughly one person in 27 is born in each step. Completely different things with the same English word.
Sun plus Moon, not a house combination
The Sun is soul and vitality. The Moon is mind and feeling. Adding them is an old way of naming the day's blend of those two. Classical lists give each of the 27 a presiding deity, a short meaning, an auspicious or inauspicious nature, and a "born in this yoga" colour of temperament. Siddhi favours accomplishment. Priti favours affection. Vyatipata and Vaidhriti are the two names people fear - they are muhurta cautions that got carried across to birth, not lifelong sentences.
The same 13°20′ size appears in the 27 Nakshatras, but that count is the Moon alone against the stars. Nitya Yoga is the sum. Tithi is the Moon minus the Sun - another limb again. Keep the three apart: Nakshatra (Moon vs stars), Tithi (Moon minus Sun), Yoga (Moon plus Sun). The Janma Panchang shows all five limbs together; this page is only the yoga limb.
The 27 steps
Scrub the Sun and the Moon. Their sum lights one step on the strip. Rose-bordered steps are the classically inauspicious nine. Gold is the step that currently holds the sum. Tap a step to move the Moon so the sum lands there, with the Sun held still - that is how a birth near a boundary can flip with a small change of time.
Twenty-seven daily yogas from Vishkambha to Vaidhriti. Each is 13°20′ of Sun plus Moon. Not a diamond, and not a Raja Yoga.
Vriddhi
11 of 27. Deity: Surya. Meaning: Growth / Increase.
Steady growth with age. This is a temperament colour from the Panchang, not a Raja Yoga and not a verdict.
A teaching strip of the 27 daily yogas. It does not compute a birth. Dated results live on the Janma Yoga calculator.
Auspicious, inauspicious, and the two that get sold as fear
Nine of the 27 are classically inauspicious: Vishkambha, Atiganda, Shula, Ganda, Vyaghata, Vajra, Vyatipata, Parigha and Vaidhriti. The other eighteen are auspicious. That grading was designed for muhurta - when to start a journey, a wedding, a shop - not for judging a person. A birth in an inauspicious step marks a temperament with extra grit. The texts answer it with simple shanti, not with alarm.
Vyatipata (17th) and Vaidhriti (27th) are the two that get a dedicated dosha page, because they are the harshest of the daily list for beginnings. They still come round every 27 days. One person in 27 has each of them. Read those checkers if that is the name on your result. Do not read them as a life sentence, and do not mix them with a chart yoga of a similar name - there is also a Shoola among the Naabhasa yogas, which is a different thing entirely.
How this differs from a chart yoga
A Raja Yoga asks: which houses does this planet own, and do a kendra lord and a trikona lord join? A Gaja Kesari asks: are Jupiter and the Moon in kendras from each other? Those questions need a Lagna and a full set of grahas. A Nitya Yoga asks only: where are the Sun and the Moon, and what is their sum? You can compute it without a rising sign. That is why a rounded birth time is often still good enough here, and why a birth near a 13°20′ boundary is the one case that is tight.
If you came here because a page said you "have a yoga" and you are not sure which kind, start with this distinction, then the Raja Yoga guide for the chart kind, then the calculator that matches the question you actually brought.
How to check yours
Enter the exact birth time and pick the city so the timezone is right. The Moon moves about half a degree an hour, so the sum - and the yoga - can change through the day. The calculator shows the name, the deity, the nature, how far the yoga had run at birth, and the rest of the birth Panchang. Pair it with Janma Tithi and the Nakshatra if you want the other two Sun–Moon limbs. A chart describes a colour of temperament. It does not replace character, work, or professional advice.
