Transit Chart — Compare Today's Planets With Your Birth Chart
Enter your birth details, pick a transit date (today is the default), and this transit chart tool draws a transit chart bi-wheel — your natal chart as the inner ring, the transiting sky as the outer — with every active transit-to-natal aspect listed underneath, sorted by tightness. Change the date and the outer ring of the transit chart recomputes instantly; your natal inner ring never moves, because your birth chart does not change.
Reviewed by the Free Astrology Chart editorial team
Computed entirely in your browser. Your birth data is never uploaded or stored on a server.
Key facts
A transit chart overlays the sky for a chosen date on your natal chart and lists the aspects transiting planets make to natal planets — conjunctions, squares, trines and so on within a tight orb (1–3°). Enter birth data plus any transit date above; the inner wheel stays fixed while the outer wheel tracks your chosen moment, computed with real ephemeris math in your browser.
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Transits are how a static birth chart becomes a living instrument: as planets circle the zodiac today, they form angles to where the planets sat at your birth. Traditional astrology reads those hits as weather — themes pressing for attention while the transit holds. This transit chart page computes that comparison honestly, including the applying/separating direction of each contact.
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How this transit chart is computed
Two computations happen for every render. First your natal chart — the fixed inner ring — from your birth data. Second the sky at the transit moment you select, rendered as the outer ring with smaller glyphs. The transit chart engine then measures the angle between every transiting planet and every natal planet and reports the pairs within orb of a major aspect, each with the exact orb and whether the contact is applying (tightening) or separating (loosening).
The default orb for transit chart hits is deliberately tight — two degrees — because a transit chart is about what is active now, not everything that could be argued for years on either side. Slow movers like Saturn, Uranus, Neptune and Pluto can hover within a transit chart orb for weeks; fast movers like the Moon pass through in hours, and the transit chart list reflects that difference naturally through the date you choose.
Bi-wheel: natal inner ring, transits outer ring.
Transit-to-natal aspects within a 2° default orb.
Applying or separating direction for every hit.
Any transit date — today, a birthday, a decision day.
Your natal ring never changes when the date changes.
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Reading the transit chart bi-wheel and hit list
Start with the list, not the wheel of the transit chart: the tightest orbs at the top are the loudest weather. "Transit Saturn square natal Venus, orb 0.4°, applying" reads as a classic structure-versus-pleasure tension peaking now; the same square at 2.8° would barely register. Cross-check each transit chart hit visually on the bi-wheel — the aspect lines you see drawn belong to your natal chart, while the outer glyphs show where the pressure is currently coming from.
Then look at what is not hitting your transit chart. Quiet stretches are real information too: weeks when only fast movers appear in the transit chart list are low-pressure windows for the themes of your slow planets. People who check a transit chart weekly develop a feel for their own rhythm — which is precisely the self-observational use astrology is good at.
Transit chart hits: applying vs separating
An applying transit is tightening toward exact — the story is building. A separating transit has peaked and is dissolving. The list marks each hit, computed by sampling the transiting planet's motion twelve hours forward, so a "today" reading can tell buildup from aftermath.
House context for transit chart hits
If your birth time is on file, the transit chart gains house meaning: a transit planet crossing your natal tenth house speaks to career themes while it is there. The transit chart bi-wheel keeps natal houses visible for exactly that overlay reading.
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What this transit chart can and cannot tell you
Honest framing, enforced on this transit chart page: transits describe angles between planets, computed exactly. Their meanings are traditional interpretive frameworks — useful prompts for attention and reflection, not verified causes of events. A transit chart cannot predict that something will happen; it can show which natal themes the transit chart is pressing, which is a different and smaller claim.
The transit chart tool therefore reports facts first: which planet, which natal planet, which angle, how close, which direction. The interpretive sentence exists only as tradition attached to the fact. If you want the same honesty in long form, the Methodology page documents every constant used.
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Popular transit chart checks worth running
Try your birthday each year in the transit chart — the solar return moment, when the transiting Sun returns to its natal position. Try the day you are weighing a decision and see which natal planets are being contacted. Watch a slow Saturn transit chart over weeks: enter successive dates and see the same square tighten, peak and separate — the single clearest way to understand what astrologers mean by a transit chart "cycle".
For the loudest of all slow transits, the Saturn return — transiting Saturn reaching natal Saturn — the dedicated Saturn return calculator finds the exact dates by root search rather than orb snapshots, including the retrograde repeats that a single-day transit chart can miss.
Frequently asked questions
What is a transit chart used for?
A transit chart overlays the sky at a chosen date on your natal chart, showing which transiting planets currently aspect your natal placements. This page draws the transit chart as a bi-wheel with a ranked list of active hits.
Does my natal chart change when I change the transit chart date?
Never. The inner ring of the transit chart is your birth chart, fixed; only the outer ring recomputes when you change the transit chart date. The engine guarantees it — natal positions are computed once and reused.
What orb does this transit chart use for aspects?
This transit chart uses two degrees by default, because transits are about active pressure rather than wide windows. Slow-planet contacts naturally stay within transit chart orb for long stretches on their own.
Can a transit chart predict events in my life?
No, and this site says so plainly. A transit chart is exact astronomy attached to traditional interpretation; it flags themes under pressure, not outcomes. Use your transit chart as a prompt for attention, not a forecast.