Moon Phase Calculator

Calculate moon phase and illumination

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How to Use Moon Phase Calculator

Select date

Choose a date.

View phase

See moon phase name and visual.

Details

View illumination % and next full/new moon dates.

Why Choose AllTools Moon Phase Calculator?

  • ✓ Phase calculation
  • ✓ Visual moon display
  • ✓ Illumination percentage
  • ✓ Phase name
  • ✓ Next full/new moon
  • ✓ No data stored

Why Use This Tool

  • ★ Your travel data stays private in your browser
  • ★ Completely free with no usage limits
  • ★ No account or registration required
  • ★ Useful for planning trips and travel logistics
  • ★ Works on any device including mobile while traveling

Related Resources

Countdown timer → Days until date → World clock →

Frequently Asked Questions

How is the phase calculated? ▼
Based on the synodic month (29.53 days). We calculate days since a known new moon to determine the current phase.
How accurate is the moon phase? ▼
Accurate to within a day for most dates. Based on the 29.53-day synodic month cycle from a known new moon reference.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.

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