Sun Sign Calculator: Western & Vedic

Most sites decide your Sun sign from a fixed date table (“Aries: March 21 to April 19”). The real boundary moves: the Sun enters each sign at a specific hour that shifts from year to year, so a table can mis-assign anyone born within a day of the boundary. This calculator computes the Sun's actual position for your date, and if you were born on a boundary day it says so and asks for your birth time.

Astronomically the Sun is always in exactly one sign at any moment, so a “cusp birthday” only raises the question of which one, and your birth time settles it.

The two systems measure the zodiac from different starting points. Western astrology ties the zodiac to the seasons, with 0° Aries fixed at the spring equinox. Vedic astrology ties it to the stars themselves. Because the Earth's axis slowly wobbles (precession), the seasonal zodiac has drifted from the stellar one by about 24 degrees over the past two thousand years.

That 24-degree gap, called the ayanamsa, means most birthdays land in one sign tropically and the previous sign sidereally. These are two coordinate systems, and neither is “wrong”. Use the Western sign for Western horoscopes and the Vedic sign for Indian astrology, and remember that in Vedic practice the Moon sign and Lagna matter more than the Sun sign anyway.

Your Sun sign is the zodiac sign the Sun appeared to occupy on the day you were born. The Sun takes a year to travel the full zodiac circle, spending about a month in each sign, so the Sun sign is the one part of astrology almost everyone knows from their birthday alone.

In astrology, the Sun stands for the core of who you are: your vitality, will, sense of identity and the direction your life wants to move in. The Moon describes how you feel and the Lagna how you appear; the Sun describes what you are at the centre.

Read your Sun sign for the big-picture themes: how you assert yourself, what kind of work feels meaningful, where your confidence comes from and where pride can trip you. A Leo Sun leads from the heart, a Virgo Sun perfects, a Capricorn Sun builds patiently. The sign colours the way your core energy expresses itself.

In Vedic practice the Sun also signifies the father, authority, health and one's standing in the world, and its house placement adds the where to the sign's how. Treat the Sun sign as the headline of your chart. You get the real depth by reading it together with your Moon sign and Lagna, which is why those calculators sit right beside this one.

All twelve signs with both date ranges and a portrait of each sign's core energy. The Western (tropical) dates are the familiar magazine ranges; the Vedic (sidereal) dates follow the Sun's position against the stars, shifted by the ~24° ayanamsa. If your two signs differ, read both. The gap comes from the ayanamsa and is expected.

Boundary dates shift by about a day from year to year, because the Sun enters each sign at a specific hour, not at midnight. If you were born on a boundary date, use the calculator above with your birth time for the definitive answer.

1. 1Enter your date of birth. That's enough for most birthdays.
2. 2If you were born within a day of a sign change, add your birth time to settle it.
3. 3Press Calculate to see your Western and Vedic Sun signs with the Sun's exact degree in each.