The lines across the corners
Besides the cardinal axes, the classical Vastu tradition reads two diagonals. The north-east to south-west diagonal joins the lightest corner to the heaviest: the tradition keeps the north-east open, low and clean, and loads weight, height and the master's rest in the south-west. The north-west to south-east diagonal joins air to fire — movement and guests at one end, the kitchen's heat at the other.
What the tool computes
Enter your facing degree, and the tool locates both diagonals for your actual building, rotated as your building is rotated. It shows which rooms and corners of your plan sit on each diagonal and states the traditional principle for each end. The calculator quotes the practice's source records with the result, so the basis for the diagonal rules appears verbatim beside the geometry.
How to use this tool
Enter the facing degree, then walk the two lines in your own home: what stands in the north-east, what in the south-west, and likewise across the other diagonal. Compare what you find with what the result describes. The pattern to look for is simple — light where the tradition wants light, weight where it wants weight.
FAQ
Q. Why is the NE–SW diagonal called the most important? Because it spans the tradition's most sensitive corner and its most load-bearing one; imbalance across it is felt house-wide.
Q. My staircase sits on a diagonal end. What should I do? Read the zone pages for that corner and the Balancers page; heavy fixtures matter most at the north-east end.
Q. Do diagonals apply to flats? Yes — the diagonals of the flat itself, from its own corners.
The classical basis appears with each calculation result, quoted from the practice's source records.