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Your chart through time

Personal transit calculator

Compare moving planets with your natal placements. See exact contacts and the periods around them, with birth-time limits kept visible.

Use a saved chart to calculate without entering birth details again.

Date of birth

Use the local birth date in the modern (Gregorian) calendar, from 1600 to today.

Time of birth

Local birth time. For 2:30 pm, enter 14:30.

If the end is at or before the start, the range ends the next day. Equal times cover a full day.

We check the whole period. The Ascendant and houses are left out.

We check the whole local day and show any possible sign changes. The Ascendant and houses are left out.

Placidus uses your birth time to calculate unequal houses. Whole Sign gives each sign one house. Both need an exact time.

Choose the matching town or city on the next step.

Filter by country (optional)
Dates to compare

The range starts at midnight UTC. All contact times use UTC.

Your chart is private. Sharing is always your choice.

Read a transit as a moving planet meeting a natal position

Your natal placements stay fixed at their birth-chart positions. The transiting planet moves through the zodiac. A contact appears when their separation meets an aspect angle, such as a conjunction or square.

For example, a natal Sun at 10° Aries and a transiting planet at 10° Cancer form an exact square. At 9° Cancer, the square has a 1° orb: the distance from the exact angle. These are illustrative positions.

Why one contact can have several dates

A planet can pass a natal degree, move back across it during apparent retrograde motion, then cross it again moving direct. Those are separate exact passes of the same contact. A selected date range can contain only part of that sequence.

What the dates describe

An exact contact is a calculated angle between a moving planet and a natal placement. The surrounding window uses a stated angular allowance, called an orb. These dates do not predict the timing or probability of a life event.

An unknown or approximate birth time leaves natal degrees unresolved. Possible windows preserve those ranges without guessing an exact contact time. You can also use the shared sky and date browser.