🌙Moon Phase Calculator

Calculate the moon phase for any date — new, full, crescent, and more.

Select Date

🌖

Waning Gibbous

Saturday, April 4, 2026

95%

Illumination

Days to Full Moon

🌑

New

🌓

Quarter

🌕

Full

🌗

Quarter

About Moon Phase Calculator

Find the moon phase for any date in history or the future — from new moon to full moon and every crescent, quarter, and gibbous phase in between. The calculator uses precise lunar cycle mathematics to show the illumination percentage, phase name, and time until the next full or new moon.

How to Use Moon Phase Calculator

1
Step 1
Enter any date (past, present, or future) to look up the moon phase.
2
Step 2
View the phase name, illumination percentage, and a visual indicator of the moon's current appearance.
3
Step 3
Check the dates of the next new and full moon for planning purposes.

Common Use Cases

Planning outdoor photography or stargazing around the full moon
Gardeners using lunar planting calendars based on moon phases
Writers and creators checking historical moon phases for period accuracy
Tracking moon phases for spiritual or wellness practices

Frequently Asked Questions

How accurate is the moon phase calculation?

The calculator uses standard astronomical formulas based on the lunar synodic period (29.53 days) and is accurate to within a few hours for most dates.

What moon phases are shown?

All eight primary phases are identified: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent.

Can I find the next full moon from today?

Yes. The tool always shows the date and time of the next full moon and next new moon from your selected date.