Free Calculator · 🌙
Moon Phase Calculator
Pick any date and instantly see the Moon's phase and illumination — including your own birthday.
Free · Instant · No signup required
Full Moon
99.1% illuminated · day 15.6 of the cycle
Peak illumination — culmination, clarity, and heightened emotion.
How it works
We measure the number of days elapsed since a known reference New Moon (6 January 2000) and take that count modulo the average synodic month (≈29.53 days) — the real length of one full lunar cycle. That position in the cycle maps directly to one of the eight named phases and an illumination percentage. Accurate to the correct phase for any date, computed instantly and entirely offline.
Curious for more?
A fun number is a start. Your actual chart tells the fuller story.
Chat with a Kaalveda astrologer for a real reading, or get your full birth chart computed from your exact birth details.