How does the timestamp converter work?

The Unix timestamp converter translates between human-readable dates and Unix timestamps (seconds since January 1, 1970). It supports both conversion directions.

Can I calculate the difference between dates?

Our date difference calculator computes the exact duration between two dates in years, months, days, hours, minutes, and seconds.

How does the moon phase calculator work?

The moon phase calculator determines the current moon phase based on astronomical algorithms. It shows the phase name, illumination percentage, and a visual representation.

Is the time zone tool accurate?

The time zone converter uses built-in browser time zone data and supports major time zones worldwide. It accounts for daylight saving time where applicable.

Moon Phase Calculator

Free online moon phase calculator. Moon phase for any date (lunar algorithm). Plan and calculate dates effortlessly.

Date

🌒

Waxing Crescent

Illumination: 7%

Moon age: 2.5 days

A small sliver of the Moon becomes visible as it moves away from the Sun.

Next Full Moon

Wed, Aug 26, 2026

Next New Moon

Thu, Sep 10, 2026

🌑

New Moon

🌒

Waxing Crescent

🌓

First Quarter

🌔

Waxing Gibbous

🌕

Full Moon

🌖

Waning Gibbous

🌗

Third Quarter

🌘

Waning Crescent

Embed this tool

Copy and paste the code below into your website to embed this tool for free. An attribution link to The Util Box is required.

<iframe src="https://www.theutilbox.org/embed/moon-phase-calculator" width="600" height="500" frameborder="0" style="border: none; max-width: 100%;" title="Free Moon Phase Calculator tool from The Util Box"></iframe>
<!-- Free tool by The Util Box — https://www.theutilbox.org/tools/moon-phase-calculator -->
<a href="https://www.theutilbox.org/tools/moon-phase-calculator">Moon Phase Calculator by The Util Box</a>

Frequently Asked Questions about Moon Phase Calculator

What Is Moon Phase Calculator?

Free online moon phase calculator. Moon phase for any date (lunar algorithm). Plan and calculate dates effortlessly. Whether you need a quick calculation, text transformation, or data conversion, this free online dates time tool delivers instant results entirely in your browser — no server uploads, no sign-ups, and no data leaves your device.

How to Use the Free Moon Phase Calculator Online

Enter your input — type, paste, or select data in the provided field.
Adjust options — tweak any available settings or parameters to match your needs.
Get instant results — output appears immediately as you type or after clicking a button.
Copy or export — use the copy button to grab the result for use elsewhere.

All processing happens client-side using JavaScript, so your information never leaves your computer. This free online dates time tool requires no registration and works on any modern browser.

Why Choose Our Free Moon Phase Calculator Tool?

100% free — no hidden premium tiers or usage limits.
Fully private — runs entirely in your browser; no data is sent to any server.
Instant & fast — results appear in milliseconds with zero load times.
Works offline — after the first load, the tool is available without an internet connection.
No sign-up — open the page and start using it immediately.

Moon Phase Calculator — Quick Reference

Feature	Details
Category	dates time
Processing	100% client-side (browser)
Privacy	No data leaves your device
Cost	Free — no sign-up required
Works Offline	Yes (after first load)