Free tools
Astrology calculators that actually calculate
Some “calculators” on the internet are lookup tables in disguise. They ask for your birth date, match it against a fixed range, and hand back a sign. That works right up until your birthday falls near a cusp — which is exactly when people go looking for a calculator in the first place.
These compute the real positions of the planets for the birth details you provide, from astronomical data professional astrologers use. Every one of them is free, and none of them require an account.
Your whole natal chart, no email
Free Birth Chart Calculator
The full chart on one page: the wheel, every planet with its degree and house, the 12 house cusps, aspects with orbs, and a reading for each of them, all open. Leave the time blank and it still returns every planet; it just skips the Rising sign and houses honestly.
What it needs: Date and place; time optional
Score two Sun signs, or two birth dates, for love, sex, communication, friendship and marriage.
Zodiac Compatibility Calculator
Pick two signs for a quick score, or enter two birth dates to compare the Sun, Mercury, Venus and Mars at the sign level. Results give a score for love, sex, communication, friendship and marriage, a reading for each pair and a question to talk through.
What it needs: Two zodiac signs, or two birth dates from 1900 onward. No birth time needed.
The phase whose light completes your birth moon
Moon Phase Soulmate Calculator
Draws your birth moon and names its soulmate phase, then compares two birthdays to show how the two moon pictures fit. Birth time is optional; on a day the Moon changed phase, it gives the minute.
What it needs: Birth date; time optional
Your Big 3 — and the full Big 6
Sun, Moon & Rising Calculator
The one most people want first. Enter your birth date, time and place and get your Sun, Moon and Rising, plus Mercury, Venus and Mars.
What it needs: Date, time and place
How you love, from real planetary positions
Venus Sign Calculator
What you find beautiful, what you're drawn to, and how you want affection delivered. Computed from a real ephemeris, with Mars and Mercury shown alongside; add your birth time on an ingress date.
What it needs: Date and place; time optional
Your Ascendant, from the exact minute
Rising Sign Calculator
The sign on the eastern horizon when you were born, which sets your whole house wheel. Needs a birth time; without one it gives you Sun and Moon and leaves the rising blank rather than guessing. The guide around it explains why that honesty matters.
What it needs: Date, time and place
How you chase, how you fight, and the dates Mars sat in your sign
Mars Sign Calculator
Your Mars sign from a real ephemeris, whether Mars was retrograde on the day you were born (checked against exact station days), and the dated window Mars spent in your sign. Birth time is optional; it settles the handful of ingress days.
What it needs: Date and place; time optional
Your whole nodal axis, not just half of it
North Node Calculator
Your North Node, your South Node and your nodal-return years, plus the house each falls in when you add a birth time. The signs usually need only a date, since the nodes drift about 0.053° a day.
What it needs: Birth date and place; time for the house
Where growth and luck run in your chart
Jupiter Sign Calculator
Needs nothing but your birth date — Jupiter moves slowly enough that time and place genuinely don't matter. Runs on a verified 1935–2032 ingress table that keeps every retrograde re-entry.
What it needs: Birth date only
Sign, exact degree, retrograde status and your Neptune-cycle dates
Neptune Sign Calculator
Neptune spends about fourteen years in a sign, so your birth date is all it takes. Runs on a verified 1861–2052 ingress table that keeps every retrograde re-entry, checks exact station days for natal retrograde, and dates your Neptune sextile, square, trine and opposition.
What it needs: Birth date only
Exact start and end dates, all three returns
Saturn Return Calculator
The transit adulthood is famous for, dated properly: your first, second and third Saturn return windows from a verified 1926–2041 ingress table — including the retrograde re-entries that make returns start, pause, and restart.
What it needs: Birth date only
FULL REPORT
Why you are the way you are
Every placement, house, and major aspect interpreted together: why you love, work, and react the way you do.
Get Full ReportOne-time report — no account needed
$19 $9.50 · 50% off · one-time · PDF download
Buying for someone else? Enter their birth details — it's a gift that needs no account.
Want all of it in one place?
A free ZodiScope account saves your birth details once and gives you your complete chart — all ten planets, twelve houses and the aspects between them — plus daily readings written against your own placements rather than your Sun sign alone.
Create a free accountKeep reading
- · What every placement in your chart means: the birth chart guide.
- · The twelve houses, explained: natal chart houses.
- · How you love, sign by sign: Venus sign meaning.
- · The sign behind your first impression: what is my rising sign?