Apr 16 – 22
Aries–Taurus Cusp: Cusp of Power
Aries’ drive meets Taurus’ persistence: bold goals backed by stamina.
Ruled by Mars & Venus
✨ Free · No signup · Private
Zodiac Cusp Calculator: Are You on the Cusp?
Enter your birth date to see the exact degree of your Sun, whether you sit on a cusp between two signs, and what that blend means.
Your Sun sign
0°cusp zone = first and last 2°30°
- Sun position
- Element
- Modality
- Cusp name
What is a zodiac cusp?
A zodiac cusp is the boundary where one sign ends and the next begins. In the tropical zodiac each sign covers 30° of the Sun’s yearly path, and the Sun crosses a boundary about once a month. Someone born in the days just before or after that crossing is said to be born on the cusp, and astrologers often read their personality as a mix of the two neighbouring signs.
Strictly, the Sun is in only one sign at any moment, so a cusp does not create a second Sun sign. It is a way to describe how close you were to the edge. That is why this calculator reports your true Sun sign first, then your cusp status.
How the zodiac cusp calculator works
Most cusp pages match your birthday against a fixed date list. This tool calculates the Sun’s apparent ecliptic longitude for your exact birth moment (date, time and UTC offset) using the standard low-precision solar algorithm, accurate to roughly 0.01°. It then reads off the sign and degree.
- 0°–2° of a sign: cusp with the previous sign.
- 28°–30° of a sign: cusp with the next sign.
- 2°–28°: firmly inside the sign, no cusp.
Because the Sun moves about 1° a day, the 2° rule gives a window of roughly four days around each sign change. Ingress times shift slightly each year, so dates in the table below are guides, not guarantees.
Does birth time matter for cusp signs?
Only near a sign change. If the Sun changes sign on your birthday, your birth hour decides which sign you are. Enter your birth time and the time zone of your birthplace for those dates. Otherwise the date alone gives the same result.
The 12 zodiac cusps and their dates
Commonly cited cusp windows, cusp names and meanings. Use the calculator above for your exact result.
May 17 – 23
Taurus–Gemini Cusp: Cusp of Energy
Taurus’ steadiness meets Gemini’s curiosity: practical, talkative, quick to learn.
Ruled by Venus & Mercury
Jun 17 – 23
Gemini–Cancer Cusp: Cusp of Magic
Gemini’s wit meets Cancer’s intuition: imaginative, expressive, emotionally aware.
Ruled by Mercury & Moon
Jul 19 – 25
Cancer–Leo Cusp: Cusp of Oscillation
Cancer’s sensitivity meets Leo’s confidence: warm-hearted, with mood swings between shy and bold.
Ruled by Moon & Sun
Aug 19 – 25
Leo–Virgo Cusp: Cusp of Exposure
Leo’s flair meets Virgo’s precision: creative talent with a sharp, analytical eye.
Ruled by Sun & Mercury
Sep 19 – 25
Virgo–Libra Cusp: Cusp of Beauty
Virgo’s care meets Libra’s grace: refined taste, fairness and a love of harmony.
Ruled by Mercury & Venus
Oct 19 – 25
Libra–Scorpio Cusp: Cusp of Drama and Criticism
Libra’s charm meets Scorpio’s intensity: magnetic, perceptive, and deeply loyal.
Ruled by Venus & Pluto
Nov 18 – 24
Scorpio–Sagittarius Cusp: Cusp of Revolution
Scorpio’s depth meets Sagittarius’ freedom: passionate, blunt, and independent.
Ruled by Pluto & Jupiter
Dec 18 – 24
Sagittarius–Capricorn Cusp: Cusp of Prophecy
Sagittarius’ vision meets Capricorn’s discipline: big ideas with a plan to deliver.
Ruled by Jupiter & Saturn
Jan 17 – 23
Capricorn–Aquarius Cusp: Cusp of Mystery and Imagination
Capricorn’s structure meets Aquarius’ originality: unconventional but dependable.
Ruled by Saturn & Uranus
Feb 15 – 21
Aquarius–Pisces Cusp: Cusp of Sensitivity
Aquarius’ ideals meet Pisces’ empathy: inventive, compassionate, and dreamy.
Ruled by Uranus & Neptune
Mar 17 – 23
Pisces–Aries Cusp: Cusp of Rebirth
Pisces’ compassion meets Aries’ courage: sensitive people who still act decisively.
Ruled by Neptune & Mars
Cusp sign vs Sun sign vs rising sign
Your Sun sign is the sign the Sun occupied at birth. Your cusp status says how near that sign’s edge the Sun was. Your Moon sign and rising sign depend on birth time and place and can explain why you feel like a blend of signs even when you are not on a cusp. For the full picture, run a birth chart.
Zodiac cusp vs house cusp
“Cusp” has a second meaning in astrology: a house cusp is where one of the 12 chart houses begins. A sign cusp is a boundary on the zodiac wheel; a house cusp is a boundary in your personal chart. This calculator covers sign cusps only.
Zodiac cusp calculator FAQ
What is a zodiac cusp?
A zodiac cusp is the boundary between two zodiac signs. People whose Sun sits within a few days (about 2° of ecliptic longitude) of that boundary are said to be “on the cusp” and may relate to the traits of both neighbouring signs.
How do I know if I am on the cusp?
Enter your birth date, and if you know it, your birth time and UTC offset. The calculator finds the exact degree of the Sun. If it is within 2° of the start or end of a sign, you are on a cusp and both signs are named.
Are zodiac cusps real?
Astronomically, the Sun is in one sign at a time, so you have one Sun sign. Cusps are an interpretive idea in popular astrology: being close to a boundary may blend the flavour of two signs, but it is not an official third sign.
What are the zodiac cusp dates?
Commonly quoted cusp windows run roughly the 16th–25th of each month, depending on the source. Real sign changes move by up to a day between years, so the degree-based result above is more reliable than any fixed date list.
Does birth time matter for cusp signs?
Yes, but only if you were born on or within a day of a sign change. The Sun changes sign at a specific hour, so two people born on the same date can have different Sun signs. Otherwise your birth date alone is enough.
Which sign should I use if I am on the cusp?
Use the Sun sign the calculator shows. It is your true Sun sign. Read the neighbouring sign as a secondary influence, and check your Moon and rising sign for a fuller picture.
Why do different websites show different cusp dates?
Some sites use a fixed block of calendar days, others use degrees of the Sun, and sign ingress times shift slightly each year and by time zone. This tool uses a 2° rule and your actual birth moment.
Is this cusp calculator free and private?
Yes. It is free, needs no signup, and runs entirely in your browser. Your birth details are never sent to a server.
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Open tool →For entertainment and education. Astrology is not scientific advice. Results use a standard approximate solar algorithm; for births within minutes of a sign change, verify with a professional ephemeris.