Precision Calculations

Free Sun Sign Calculator

Find your exact Sun sign, zodiac degree, house placement, and interpretation from your birth date, time, and city.

Calculate My Sun Sign View Documentation

Free astrology tool

Calculate your Sun Sign

Enter your birth details to calculate the exact zodiac position of the Sun—not an approximate date-range result.

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Your exact result appears here

Find your exact Sun sign, zodiac degree, house placement, and a focused interpretation. The calculation uses the same focused endpoint documented for developers.

View Simple Signs API documentation

Why use our Sun Sign API?

Stop using approximate date ranges. Calculate the True Solar Position with astronomical accuracy.

Cusp Handling

Born on the 20th or 21st? Standard dates fail here. We calculate the exact moment the Sun changes signs, handling "cusp" birthdays perfectly.

House Placement

Unlike basic calculators, we determine which House the Sun resides in (e.g., "Sun in 10th House"), adding depth to your analysis.

Interpretation

Get a ready-to-display paragraph explaining the Sun's position. Choose between "Classical Improved" (Modern) or "Poetic" styles.

Integration in Seconds

A lightweight, specialized endpoint designed for speed. Perfect for onboarding flows or daily horoscopes.

Absolute Position

Get abs_pos (0-360°) for easy aspect logic.

Timezone Aware

We handle UTC conversions automatically.

curl -X POST "https://api.freeastroapi.com/api/v1/western/signs/sun" \
 -H "Content-Type: application/json" \
 -H "x-api-key: YOUR_KEY" \
 -d '{
    "year": 1990,
    "month": 5,
    "day": 15,
    "hour": 14,
    "minute": 30,
    "city": "New York",
    "zodiac_type": "tropical",
    "house_system": "placidus"
}'

Frequently Asked Questions

How do you handle cusp dates?

"Cusps" are a myth caused by approximate dates. The Sun is always in exactly one sign at any given second. By using the exact birth time and location, our calculation engine determines the precise sign, eliminating ambiguity.

Can I get the house placement?

Yes. If you provide the birth time, we calculate the house (1-12) the Sun falls in. You can even specify the house system (Placidus, Whole Sign, etc.).

Is Sidereal Zodiac supported?

Absolutely. Just pass "zodiac_type": "sidereal" in your request to get Vedic/Sidereal positions.

Ready to Build?

Get your API key in seconds and start calculating accurate signs today.