Moon Calculators
Free moon phase calculators — pick a date and get the exact moon phase, age, illumination, and more.
Moon Phase Calculator
Type in any date and this calculator shows the exact moon phase emoji for that day.
Moon Age Calculator
Work out the lunar age of the moon on any date you choose.
Moon Illumination Calculator
Calculate the exact percentage of the moon's face that is lit on any day.
Days Until Full Moon
Count down the number of days left until the next bright full moon.
Days Until New Moon
Count down the days until the next new moon begins a fresh lunar cycle.
Lunar Cycle Length Calculator
Work out the precise length of one lunar cycle and how it shifts over time.
Moon Distance Calculator
Calculate how far away the moon is on any given date, in kilometers.
Moon Phase Difference Calculator
Compare two dates and see how the moon changed between them.
Supermoon Calculator
Check whether a full moon on a given date is close enough to be a supermoon.
Moonrise Time Calculator
Estimate the moonrise time for your location and any date.
Lunar Month Counter
Count the number of complete lunar months between two dates.
Moon Visibility Percent Calculator
Calculate how visible the moon is as a percent for any date.
Phase To Date Calculator
Pick a moon phase and find the next date that phase happens.
Moon Phase Birthday Calculator
Find out what the moon looked like on the day you were born.
Lunar Calendar Generator
Generate a printable lunar calendar for any month of any year.
Moon Emoji Picker
Pick any moon emoji and copy its unicode, meaning, and the phase it shows.
Crescent Visibility Calculator
Calculate whether the first crescent moon will be visible after sunset.
Eclipse Timing Calculator
Calculate the exact start, peak, and end time of upcoming lunar eclipses.
Free Moon Calculators For Any Date
Our moon calculators are free, fast, and accurate tools that give you real numbers about the moon. Just pick a date and you get the exact moon phase emoji, the moon age in days, the illumination percent, and even how far away the moon is in kilometers. Every number is calculated using the same astronomy math NASA uses, so you can trust the result to within a few minutes of the real moon.
A moon phase calculator is the easiest way to answer the question, what will the moon look like on this date? Whether you are planning a trip, a wedding, a night walk, or just curious about the sky, our lunar calculator gives you the answer in seconds. There is no sign up, no download, and no ads in the way. You type a date, you get the moon.
We also have a moon age calculator that tells you how many days old the moon is since the last new moon, a moon illumination calculator that shows the percent of the moon face that is lit up, and a moon distance calculator that shows how far the moon is on any given day. The moon distance changes a lot because the moon's orbit is not a perfect circle, so the moon can be as close as 356,500 km or as far as 406,700 km.
Want to know when the next full moon is? Try the days until full moon calculator. Want to check if a full moon is a supermoon? Use the supermoon calculator. Want to know the exact start, peak, and end time of the next lunar eclipse? Open the eclipse timing calculator. Every calculator on this page works the same way — pick a date, get an answer, all for free.