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How it works

How it works

Every position is computed from the Swiss Ephemeris. When we cannot know something, we leave it out and say so.

How it works

You tell us when and where you were born. We compute your chart from the Swiss Ephemeris — the same engine professional astrology software uses — and show you the result.

That first chart is free and needs no account.

Computed, not looked up

Nothing here is a lookup table or a generic description of your Sun sign. Every planetary position, house cusp and aspect is calculated for your exact moment and place, to arc-second precision, and the version of every input is recorded alongside the result.

That last part matters more than it sounds. If the timezone database or the ephemeris changes, we compute a new chart rather than silently altering your old one — so a reading written today still means the same thing in five years.

If you do not know your birth time

Most people do not, and it is not a problem — but it does change what a chart can say.

The Ascendant, the Midheaven and all twelve house cusps depend on the Earth's rotation. The Ascendant moves about one degree every four minutes, so without a time there is no honest way to place them. We leave them out and tell you, rather than assuming noon.

What we will not do

We will not pick a time for you. Some software silently defaults an unknown birth time to midday and draws a full chart with the same confidence as a real one. That chart looks right and is not.

Western and Vedic

You can have either, and they are genuinely different charts of the same birth rather than two views of one.

Western uses the tropical zodiac and Placidus houses. Vedic uses the sidereal zodiac with the Lahiri ayanamsha — the Indian government's standard, and what Jyotisa practitioners use — with whole-sign houses and the mean lunar nodes. We show nakshatras and padas too.

From a date to a chart

  1. Tell us when and where

    Three questions. If you do not know your birth time, say so — it changes what a chart can show, and we say what.

  2. We compute it

    The Swiss Ephemeris runs against your exact moment and place. No AI is involved at any point.

  3. You read it

    The wheel, the angles, every position and every aspect, with the version of every input recorded beside the result.

  4. Ask it something

    A written reading answers a question about your chart. That part needs an account.

What you can cast

Do I need to know my birth time?

No, and most people do not. You still get a chart — the Sun, the planets and every aspect are computed exactly as they would be with a time. What you do not get is an Ascendant, a Midheaven or house cusps, and we say so rather than assuming midday.

Is the chart written by an AI?

No. Positions, houses, aspects and the horary judgment are all computed — arithmetic over the Swiss Ephemeris, with no model involved. A model only writes the prose of a reading, and only from facts that were computed first.

How do I know it is accurate?

The same engine professional software uses, checked against two independent sources. The ephemeris, timezone and house-table versions are recorded with your chart, so a change to any of them produces a new chart rather than silently altering yours.

Start with a chart. Decide about the rest later.

No phone number and no card. Three charts before we ask you for anything at all.

Charts stay free. Readings cost credits, and credits never expire.

Not medical, legal, financial or psychological advice.

Begin with the real sky

Your chart is waiting.

Calculate it precisely, explore it freely, and decide later whether you want a written interpretation.

Free to calculate

Your complete chart costs nothing. Credits apply only when you request written interpretation.

Math before language

Swiss Ephemeris computes the sky. AI is never permitted to invent a position, house, or aspect.

No time? No fiction.

If your birth time is unknown, Roho omits the Ascendant and houses instead of silently choosing one.