Almanac & sky · NUMORA
Sun Sign Calculator
You want the four pillars straight: when the year flips, which two-hour branch, and whether longitude is corrected.
Open interactive calculatorHow to use
Aries begins at the equinox, not a fixed 21 March.
Formula
sign = floor(λ☉ / 30°)
FAQ
Is this Sun Sign calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Aries begins at the equinox, not a fixed 21 March.
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