A house number's numerology root is the digits of the address added and reduced to a single digit from 1 to 9, with any letter suffix converted through the Chaldean table and added in, so 12B totals 1 + 2 + 2 = 5. This calculator returns that root and its ruling planet, and with your date of birth it checks the root against your Mulank.
The nine rulerships used here are the ones standard throughout Indian numerology: 1 Sun, 2 Moon, 3 Jupiter, 4 Rahu, 5 Mercury, 6 Venus, 7 Ketu, 8 Saturn and 9 Mars. They come from modern practice rather than from any classical text, and the app says so with the result rather than presenting the mapping as scripture.
The digits of your address add up to a single root from 1 to 9, each ruled by a planet that sets the tone of the home:
The number of the unit you actually live in carries the strongest vibration, since that is your personal space; a building, block or plot number gives a broader background influence. If the address has a letter - such as 12B - its Chaldean letter value is added in with the digits before reducing to a single root.
No single number is universally lucky. The number that serves you best is the one whose energy matches your goals and harmonises with your own Mulank, so entering your date of birth lets the tool flag whether your home's vibration supports or challenges you.
Only letters and digits are counted, so slashes, hyphens and spaces in an address make no difference to the total. If you add your date of birth the tool computes your Mulank from the day of the month you were born and reports whether the home's root harmonises with it; without a date it reports the root and a general rating only.
Enter the number on your own door. Where a flat number and a building number both exist, practice reads the unit you actually live in, and treats the building, block or plot number as a wider background influence over everyone in it. An address written as 12B is entered whole: B carries its Chaldean value of 2 and is added to 1 and 2 before the total is reduced, giving 5.
That is why the suffix cannot be dropped. 12 alone reduces to 3 and 12B reduces to 5, so an address entered without its letter answers a different question from the one you asked. If your address carries two letters, or a block letter as well as a flat letter, enter the whole string the way it is written on the door.
For educational purposes. Astrological interpretations are traditional and not a substitute for professional advice.