วิธีการคำนวณ Lunar Calendar

learn.whatIsHeading

A lunar calendar calculator determines the moon's phase on any date using the 29.53-day synodic cycle. Moon phases affect tides, some wildlife, and many cultural and religious calendars.

สูตร

Lunar month = 29.53 days (synodic period) | Lunar year = 354.36 days | Islamic calendar is lunar

คำแนะนำทีละขั้นตอน

1Reference new moon: 6 January 2000
2Days elapsed since reference mod 29.53 = phase day
3Illumination = (1 − cos(2π × phase/29.53)) / 2 × 100%
48 named phases divide the cycle

ตัวอย่างที่มีคำตอบ

อินพุต

Phase day 14.77 (halfway through cycle)

ผลลัพธ์

Full Moon — 100% illuminated

คำถามที่พบบ่อย

What is Lunar Calendar?

A lunar calendar calculator determines the moon\. Use this calculator for accurate, instant results.

How accurate is the Lunar Calendar calculator?

The calculator uses the standard published formula for lunar calendar. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Lunar Calendar calculator use?

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Lunar Calendar calculator use?

The core formula is: Days elapsed since reference mod 29.53 = phase day. Each step in the calculation is shown so you can verify the result manually.

พร้อมที่จะคำนวณแล้วหรือยัง? ลองใช้เครื่องคิดเลข Lunar Calendar ฟรี

ลองด้วยตัวคุณเอง→