What do I need to find the aspects in my chart?

Three details: your birth date, birth time, and birth place. Aspects are counted from each planet's sign position, and while most planets keep their sign all day, the Moon changes sign roughly every two and a quarter days and the ascendant changes about every two hours. The ascendant fixes which sign is your 1st house, so the houses every aspect lands in depend on birth time being right.

How are planetary aspects calculated in Vedic astrology?

From each planet's sidereal sign position, aspects are counted forward through the zodiac with the planet's own sign as number one. Every planet casts a full aspect on the 7th sign of that count; Mars also on the 4th and 8th, Jupiter on the 5th and 9th, Saturn on the 3rd and 10th. The aspect covers the entire target sign, so it falls on that house and on every planet standing in it.

What does it mean if a house in my chart receives no aspects?

Nothing troubling. An unaspected house is read from its other inputs: the sign on it, the condition of its lord, and any planet occupying it. Aspects are one of several channels of influence, and most charts have a few houses no gaze reaches. The reading is that the house's matters run on their own character, shaped by the lord's placement rather than by other planets watching from a distance.

Are aspects from benefic and malefic planets read differently?

Yes, and it is the first thing to check in a result. Gazes from Jupiter, Venus, a bright Moon, and a well-associated Mercury support and protect what they fall on. Gazes from Saturn, Mars, the Sun, and the nodes bring weight, heat, or pressure that asks to be worked with. Neither kind is a verdict: a malefic's gaze paired with a benefic's on the same point is the classic blend of test and support.

Does this calculator count aspects for Rahu and Ketu?

Yes, using the convention that grants the nodes a Jupiter-like gaze on the 5th, 7th, and 9th signs from themselves. Traditions differ here: many lineages give Rahu and Ketu no aspect of their own, and readings in that style ignore nodal gazes entirely. Both conventions are classical and defensible, which is why careful astrologers state the one they follow. The result marks nodal aspects so you can include or set them aside.

What's Aspecting My Chart?

What's aspecting your chart is answered by tracing graha drishti, the planetary gaze of Vedic astrology, from each planet's position at your birth. The rules are few: every planet casts a full aspect on the 7th house counted from itself, Mars also aspects the 4th and 8th, Jupiter the 5th and 9th, and Saturn the 3rd and 10th, all counted forward. Run those counts for all nine grahas, the planets of the system, and you have the complete web: every house and every planet in your chart, with the list of gazes each one receives. The calculator on this page does exactly that from your birth date, time, and place, and the article around it explains how to read what comes back.

What the result shows you

The calculator returns your chart's aspect map: for each of the twelve houses, the planets gazing on it and by which aspect, and for each planet, the other planets whose gaze falls on it. Mutual aspects, two planets each aspecting the other, are flagged, and so are conjunctions, planets sharing one sign and house.

The map answers the questions an astrologer asks first when judging any part of a chart. Who watches the 7th house of marriage? Is the 10th house of career under Saturn's structuring gaze or Jupiter's protective one, or both? Which planets stand unwatched, running purely on their own condition? Houses with no occupant get their due here too, since a gaze falling on an empty house is a real influence on its matters.

What you need before you start

Three inputs: birth date, birth time, and birth place. The date and place set the planets' positions; the time matters doubly here. The Moon changes sign about every two and a quarter days, so its aspects can shift within a single date. And the ascendant, the sign rising in the east at your birth moment, changes roughly every two hours, fixing which sign counts as your 1st house and therefore which house every aspect lands in.

If your recorded time is approximate, the planet-to-planet aspects are usually stable anyway, since they depend only on sign positions. It is the house assignments that move with the ascendant, so treat house-level results as provisional until the time is confirmed. The reasoning on the why birth time matters page applies in full.

How the calculation works

The method is mechanical, and the aspect rules it applies are the ones the Brihat Parashara Hora Shastra lays out.

Compute the positions of the Sun, Moon, five planets, and the two nodes for your birth moment from an astronomical ephemeris. Steer's calculators use the Swiss Ephemeris, built on NASA JPL planetary data.
Convert to the sidereal zodiac by subtracting the ayanamsa, the offset between the star-anchored and equinox-anchored zodiacs; the Lahiri ayanamsa is the standard choice.
Fix the ascendant from your birth time and place, which assigns the twelve houses by whole signs.
For each planet, count forward from its sign as number one and mark the 7th, adding the 4th and 8th for Mars, the 5th and 9th for Jupiter, the 3rd and 10th for Saturn, and the 5th, 7th, and 9th for Rahu and Ketu under the convention this calculator follows.
Record every house and planet each gaze lands on, then collect the reverse view: for each point, everything aspecting it.

A worked example: suppose Saturn at your birth sits in sidereal Taurus, in your 7th house. Counting Taurus as one, Saturn's 3rd aspect falls on Cancer, your 9th house; its 7th aspect on Scorpio, your 1st; its 10th aspect on Aquarius, your 4th. Any planet in those signs, and your ascendant itself, sits under Saturn's watch.

How to read your result

Start with the nature of each gazing planet. Aspects from Jupiter, Venus, a bright Moon, and a well-associated Mercury are supports: the houses and planets they fall on have standing help. Aspects from Saturn, Mars, the Sun, and the nodes are demands: weight, heat, or intensity that the chart is asked to direct. The full reading of any point weighs all its visitors together, so a house seen by Jupiter and Saturn at once is blessed and tested in the same breath, protected while it earns its results slowly.

Then look for the flagged patterns. Mutual aspects bind two planets' agendas together for life and deserve reading as pairs. Conjunctions are closer still: planets sharing a house blend directly, an influence stronger than any gaze. And check your chart's key points specifically, the 7th house for partnership, the 10th for career, the Moon for the mind, asking the classical question of each: what sits there, and what looks on it? The meanings of each specific gaze are covered on the rule pages for the Mars aspect, the Jupiter aspect, and the Saturn aspect, with the whole system mapped at the planetary aspects.

What an aspect is not

Two boundaries keep the result honest. First, a planet never aspects the house it occupies; presence and gaze are different powers, and the calculator lists occupants separately from aspects. Second, graha drishti is one lens among several. The sign aspects of the Jaimini tradition, rashi drishti, follow a different rule entirely and are not what this tool computes, and a full reading also weighs lords, dignities, and divisional charts.

Held in that frame, the aspect map is one of the highest-value single views of a chart: it shows the connections, the web of influence that placements alone leave invisible. A chart is a set of planets in houses and a pattern of who watches whom, and readings sharpen the moment both are on the table.

After you find your aspects

Read the rule page for each planet that turns out to gaze on your chart's sensitive points, starting with whichever of Mars, Jupiter, or Saturn reaches the most of your houses. The the full guide explains the grading of aspect strength and the reading method in full. And a free birth chart lays out the positions behind every line of the result, with the houses, lords, and dignities the aspects are read against.