Transit calculator
Enter your birth date and place, and your birth time if you know it. We find every exact pass of the five slow planets over the planets and angles of your birth chart: what is active now, what opens in the next twelve months, and what just ended, with today's fast planets as a table.
What a transit is
A transit compares the sky now with the sky at your birth. When a planet moving through the zodiac reaches the same degree as a planet in your birth chart, or a major angle from it (60°, 90°, 120° or 180°), astrologers read the moving planet's themes as coming forward at the natal planet's for a while.
The slow planets matter most because they stay: Jupiter is within a degree of a point for weeks, Saturn for months, and Uranus, Neptune and Pluto for a year or more. Seen from Earth each of them also turns backwards for part of every year, so a transit that falls on that loop is exact three times, or up to five for the slowest.
An orb is how close two points must be for astrologers to count them as touching. We count a transit as active while the planet is within one degree of the exact angle, list every exact pass, and note a near pass where the planet turns round within one degree without reaching the angle.
How this is computed
Your natal positions come from your birth chart, computed by our engine in the tropical zodiac. For each slow planet we find every moment its position equals a natal point plus the aspect's angle, splitting the planet's path at the points where it turns round so no backwards loop is missed. The positions of Jupiter, Saturn, Uranus and Pluto agree with an independent ephemeris to within 0.005° and Neptune's to within 0.01° from 1920 to 2100, and the passes for 16 test births match it. Today's fast-planet table uses the day's precomputed positions.