Aaya Calculator Free: Most people think of Vastu as being about directions — where to place the kitchen, the bedroom, or the main door. But there is a deeper, mathematical side to Vastu that decides whether the very dimensions of a building are auspicious. This is called Aaya, part of the ancient system of Ayadi Shadvarga. The free calculator above lets you check it for any plot, room, or building simply by entering the length and breadth.
In short, your dimensions are considered auspicious when the Aaya (income) is greater than the Vyaya (expenditure) and the Yoni is favourable (an odd value). Enter your measurements in the calculator to see your result instantly, then read on to understand the formulas, the eight yonis, and how to adjust dimensions that are not yet favourable.
Auspicious: Aaya > Vyaya + an odd Yoni, Aim: length about 1.5× the breadth
Online Aaya Calculator Free
Aaya Calculator (Ayadi Shadvarga)
Check whether your plot, room, or building dimensions are auspicious in Vastu.
Please enter a valid length and breadth in feet.
What Is Aaya in Vastu?
In Vaidik Vastu, before the dimensions of a building are finalised, they are tested against a set of six mathematical formulas known as the Ayadi Shadvarga — literally, the “six-fold group beginning with Aaya.” These formulas take the length and breadth of a structure and produce values that indicate whether its proportions are balanced and auspicious. The idea is that a building whose dimensions are in harmony with these numbers supports prosperity and wellbeing, while one whose dimensions are off may bring a feeling of loss or struggle. Traditional architects (sthapatis) have used these formulas for centuries when planning homes, temples, and towns.
The Six Ayadi Formulas
The Ayadi Shadvarga consists of six values: Aaya, Vyaya, Yoni, Nakshatra (also called Raksha), Vara, and Tithi. In practice, a few of these carry the most weight, and they are grouped by whether they are used to fix the length or the breadth of a building.
Aaya (Income) & Vyaya (Expenditure)
The two most important values are Aaya and Vyaya. Aaya means income or gain and is calculated from the length; Vyaya means expenditure or loss and is calculated from the breadth. The single golden rule of Ayadi is that the Aaya must always be greater than the Vyaya. When income exceeds expenditure, the dimensions are believed to support financial stability and prosperity; when expenditure exceeds income, the residents may face persistent money troubles. A common way to express the formulas is that Aaya is the remainder of the length multiplied by eight and divided by twelve, while Vyaya is the remainder of the breadth multiplied by nine and divided by ten.
Yoni (Direction & Nature)
The Yoni describes the fundamental nature and direction of the building and is calculated from the breadth (the breadth multiplied by three, divided by eight, and the remainder taken). The Yoni should always be an odd value, as the odd yonis are considered auspicious and the even ones inauspicious. Because the Yoni is derived from the breadth, adjusting the width of a room or building by a small amount is often enough to shift it into a favourable Yoni.
Nakshatra, Vara & Tithi
The remaining values fine-tune the calculation. The Nakshatra (or Raksha) relates the building to a birth star and is calculated from the length. The Vara corresponds to a weekday and the Tithi to a lunar day. These three are usually matched against the birth star (nakshatra) of the owner by an experienced Vastu expert, so that the building is compatible with the person who will live in it. For most people, the practical checks are Aaya greater than Vyaya, and an odd Yoni.
The Eight Yonis Explained
There are eight yonis, each linked to an animal or symbol and a direction. The four odd yonis are auspicious, and the four even yonis are best avoided.
| Yoni | Symbol | Direction | Verdict |
|---|---|---|---|
| 1. Dhwaja | Flag | East | Auspicious (best) |
| 2. Dhumra | Smoke | South-East | Avoid |
| 3. Simha | Lion | South | Auspicious |
| 4. Shwan | Dog | South-West | Avoid |
| 5. Vrishabha | Bull | West | Auspicious |
| 6. Khara | Donkey | North-West | Avoid |
| 7. Gaja | Elephant | North | Auspicious |
| 8. Kaka | Crow | North-East | Avoid |
Dhwaja, the flag, is regarded as the most auspicious of all, followed by Simha, Vrishabha, and Gaja. When your Yoni falls on one of these odd values, the building’s nature is considered strong and favourable.
What Makes Dimensions Auspicious?
Putting it together, a set of dimensions is considered auspicious in Ayadi when two conditions are met: the Aaya is greater than the Vyaya, and the Yoni is odd (Dhwaja, Simha, Vrishabha, or Gaja). There is also a simple, practical guideline that follows from the mathematics: for the Aaya to comfortably exceed the Vyaya, the length should be about 1.5 times the breadth, or at least around 1.375 times. This is precisely why Vastu-conscious rooms and plots are usually gently rectangular rather than perfectly square — a square room, where length equals breadth, often struggles to keep income above expenditure.
How to Use the Aaya Calculator
Using the calculator above is simple. Enter the length and the breadth of your plot, room, or building in feet, and press calculate. The tool works out the Aaya, the Vyaya, and the Yoni, tells you whether the income exceeds the expenditure and whether the Yoni is auspicious, and gives an overall verdict. You can try this for an entire plot, for the built-up area of a house, or for an individual important room such as the master bedroom or the pooja room. Because the calculation is instant, you can experiment with different measurements before finalising anything on paper.
How to Fix Inauspicious Dimensions
The great advantage of checking Aaya before construction is that dimensions are easy to change on paper. If your result is not favourable, you do not need to abandon the design — you simply adjust the measurements slightly and recalculate. Increasing or reducing the length by a few inches will change the Aaya, and adjusting the breadth will change the Vyaya and the Yoni. Because the Yoni depends on the breadth, an odd number of feet in the width will often produce an auspicious Yoni. In many cases, a change of just a few inches turns an inauspicious set of dimensions into a favourable one, at no extra cost. This is why traditional builders always finalised the Ayadi values before laying the foundation.
A Note on Units & Accuracy
Traditionally, these calculations were performed using ancient units such as the Hasta (a cubit of about 2.75 feet), and different regional schools of Vastu use slightly different multipliers and refinements. This calculator uses feet for convenience, which is how most modern online Aaya tools work, and focuses on the two practical, widely-agreed checks: Aaya greater than Vyaya, and an odd Yoni. For a building you are about to construct, and especially to match the Vara, Tithi, and Nakshatra to the owner’s birth star, it is wise to confirm the final dimensions with an experienced Vastu consultant or sthapati. Treat the calculator as a helpful first check rather than the last word.
A Worked Example
To see how it works, imagine a room that is 15 feet long and 9 feet wide. The length of 15 gives an Aaya value, and the breadth of 9 gives both the Vyaya and the Yoni. Here the income (Aaya) comfortably exceeds the expenditure (Vyaya), and the breadth of nine feet produces an odd Yoni — Simha, the lion, facing south — which is auspicious. So these dimensions would be considered favourable. Now imagine a perfectly square room of 15 by 15 feet: with the length and breadth equal, the income often fails to exceed the expenditure, so the same room turns out less favourable simply because it is square. Nudging one side to make the room gently rectangular is usually all it takes to bring the numbers into balance — exactly the kind of small change Ayadi is designed to guide.
Using Aaya Alongside Room Directions
Aaya is not a replacement for the familiar direction rules of Vastu — it works alongside them. The sixteen-zone system tells you where to place a room, such as the kitchen in the south-east or the master bedroom in the south-west, while Aaya tells you what size and proportion that room should be. The strongest results come from combining the two: choose the right zone for each room, then check that the room’s dimensions give a favourable Aaya and an auspicious Yoni. Together, direction and dimension shape a home that feels balanced both in its layout and in its very measurements.
Where Aaya Is Applied
Ayadi calculations are used at every scale of construction. On a large scale, they guide the planning of temples, towns, and public buildings. On a personal scale, they are applied to the dimensions of a plot, the overall footprint of a house, and individual rooms, especially important ones such as the main hall, the master bedroom, and the pooja room. Some people also apply the principles to doors, windows, and even furniture. Wherever a dimension can be chosen freely, Ayadi offers a way to choose it so that the proportions feel balanced and auspicious.
Frequently Asked Questions
What is Aaya in Vastu?
Aaya means income or gain, and it is one of six Ayadi Shadvarga values calculated from a building’s dimensions. Auspicious dimensions are those where the Aaya (income) is greater than the Vyaya (expenditure).
How is Aaya calculated?
Aaya is commonly calculated as the remainder of the length multiplied by eight and divided by twelve, while Vyaya is the remainder of the breadth multiplied by nine and divided by ten. The calculator above does this for you.
What does it mean if Aaya is less than Vyaya?
If the Vyaya (expenditure) exceeds the Aaya (income), the dimensions are considered inauspicious and may be linked with financial strain. Adjusting the length or breadth by a few inches usually corrects this.
Which Yoni is best in Vastu?
The odd yonis — Dhwaja (Flag), Simha (Lion), Vrishabha (Bull), and Gaja (Elephant) — are auspicious, with Dhwaja considered the best. The even yonis (Dhumra, Shwan, Khara, Kaka) are best avoided.
Should a room be square or rectangular as per Aaya?
A gently rectangular room, with the length about 1.5 times the breadth, usually keeps the Aaya above the Vyaya. A perfectly square room often does not, which is why rectangular proportions are generally preferred.
Can I check the Aaya of a single room?
Yes. You can check the Aaya of an individual room, the whole house footprint, or a plot. Simply enter that space’s length and breadth. Important rooms such as the master bedroom and pooja room are especially worth checking.
Is a square plot bad in Aaya?
A perfectly square plot or room often struggles to keep the Aaya (income) above the Vyaya (expenditure), so gently rectangular proportions — length about 1.5 times the breadth — are usually preferred in Ayadi.
Does the Aaya calculator really work?
It applies the traditional Ayadi formulas to your measurements and reliably shows the Aaya, Vyaya, and Yoni, but the result is guidance based on belief rather than proven science. For construction, confirm the final dimensions with an expert.
Related Vastu Tools & Guide
For the correct direction of every room and space in one place, read our Vastu Directions Guide. You can also continue with these tools:
- Plot Vastu Calculator — check your land’s shape and slope.
- Vastu Direction Calculator — find your building’s facing direction.
- Vastu Score Calculator — check your whole home’s Vastu.
- All Vastu calculators — browse the full set.
Checking the Aaya of your dimensions is a small step that can make a real difference to how balanced a building feels. Use the calculator as a practical first check, adjust your measurements freely while they are still on paper, and confirm the final numbers with an expert before you build — so your home rests on proportions that feel harmonious and auspicious from the very foundation.
This information is based on traditional Vaidik Vastu Shastra principles and is intended for general guidance and self-reflection, not as a substitute for professional architectural or Vastu consultation. Read our full Disclaimer for more.