Most calculators on this site, and most Hindi almanacs, draw a North Indian Kundli: a diamond divided into triangles. People who learned the South Indian square first often find it upside-down. It is not. The two styles store the same twelve signs and nine grahas. They just lock different things in place.
Houses stay. Signs move.
In the North Indian diamond, the houses are nailed down. The top diamond is always the 1st house (Lagna). The house on its right is always the 12th. Going anti-clockwise, you meet 11, 10, 9… until you return. The numbers you sometimes see printed in those triangles are signs (1 = Aries … 12 = Pisces), not house numbers. The Lagna sign is written in the top diamond; every other sign follows in order around the wheel.
That is the whole trick. Find the top diamond: that is you, the first house. The sign written there is your rising sign. A planet written in that same diamond sits in the Lagna, in that sign. A planet two diamonds anti-clockwise from the top is in the 11th house, and so on.
Pick a Lagna. Houses stay put; the sign numbers move.
Lagna is Mesha (Aries)
House 1 holds sign 1. Lord: Mangal (Mars).
The top diamond is still house 1. The printed numbers are signs, so they rotate when the Lagna changes.
A layout drill, not a birth chart. Tap a house to move the sample Mars. For your own Lagna, use the Ascendant calculator.
Finding the Lagna in thirty seconds
Open a chart on the Kundli Maker and look at the North Indian drawing. The uppermost central diamond is house 1. If it shows "5" or "Simha", the ascendant is Leo. If Mars is written in that diamond, Mars is in the Lagna. If Mars is in the diamond immediately to the left of the top (which, going anti-clockwise, is house 2), Mars is in the 2nd house. You do not need to memorise a new layout every time, because the houses never relocate.
The ascendant guide explains why that top diamond matters more than the Moon sign or the Sun sign. This page is only the map-reading.
How this differs from a South Indian chart
A South Indian Kundli is a square of twelve boxes. Signs stay fixed - Aries is always a particular box - and the Lagna is marked wherever it falls, so the whole house structure slides around the square. If you grew up with that, the North Indian diamond feels as if the houses are "wrong". They are not wrong; they are using the other convention. Convert by holding the Lagna still in your mind and walking twelve houses, not by matching box shapes.
This site draws both styles on the Kundli Maker for that reason. Use the one you can count on without thinking. The planetary table underneath is the referee if the picture ever confuses you: it lists each graha's sign and house in words.
A short counting drill
Pick any planet on the diamond. Count diamonds anti-clockwise from the top until you reach it. That count is its house from the Lagna. Then look at the sign number in that diamond to know which rashi it occupies. Last, ask what that planet rules for this Lagna - that is the landlord question, and it is how yogas and doshas actually start, not from the picture alone.
Once that drill is easy, the birth-chart reading guide is the next step: Lagna lord, Moon, Sun, then the rest. The diamond is only the page. The reading is the sentence you write after you have counted.
