Almanac & sky · NUMORA
Decan Dwad Calculator
10° decans and 2.5° dwads.
Open interactive calculatorHow to use
The Sun’s decan and dwad.
Formula
decan = floor((λ mod 30)/10); dwad = floor((λ mod 30)/2.5)
FAQ
Is this Decan Dwad 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?
The Sun’s decan and dwad.
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