How Long Until 12 AM?
Need to know how long until 12 AM? The timer below shows how many hours until 12 AM, or midnight, down to the second on your device clock. When the clock hits 12, it restarts at 24 hours.
Counting to the next 12:00 AM on your device clock.
Test a Different Time
Want a time other than midnight? Set a time and date below and the timer above follows at once.
Choose a date up to 3 days ahead. It uses your device time.
Formula to Calculate Time Until 12 AM
Midnight closes every day, so one rule fits all hours. The answer is always under 24 hours.
Formula Example
At 8:30 PM (20:30): 24:00 − 20:30 = 3 hours 30 minutes. At 11:15 PM (23:15): 24:00 − 23:15 = 45 minutes.
Quick Check
Add the answer to the start time. 20:30 + 3:30 = 24:00, which is 12 AM.
12 AM at a Glance
12 AM is the zero point of the clock. Here is how it reads in each format.
Hours, Minutes and Seconds Until 12 AM
Find your current time to see how many hours, minutes and seconds until 12 AM. The chart fits every US time zone.
| Current time | Hours | Minutes | Seconds |
|---|---|---|---|
| 6:00 AM | 18 | 1,080 | 64,800 |
| 9:00 AM | 15 | 900 | 54,000 |
| 12:00 PM | 12 | 720 | 43,200 |
| 3:00 PM | 9 | 540 | 32,400 |
| 6:00 PM | 6 | 360 | 21,600 |
| 8:00 PM | 4 | 240 | 14,400 |
| 10:00 PM | 2 | 120 | 7,200 |
| 11:00 PM | 1 | 60 | 3,600 |
For how many minutes until 12 AM, multiply the hours by 60 and add the rest.
How Many Seconds Until 12 AM?
Use 3,600 seconds per hour and 60 per minute. At 11:30 PM, 30 minutes left equals 1,800 seconds.
Check the hours on each side:
12 AM Tonight, Today and Tomorrow
“12 AM tonight” and “12 AM tomorrow” usually mean the same moment, the start of the next date. For the end of tomorrow, add 24 hours.
| Start | Until | Gap |
|---|---|---|
| Today, 12 PM | Tonight, 12 AM | 12 hours |
| Tonight, 9 PM | 12 AM | 3 hours |
| Friday, 11 PM | Saturday, 12 AM | 1 hour |
| Today, 12 AM | Next 12 AM | 24 hours |
Which Day Does 12 AM Belong To?
The new one. 12:00 AM Saturday is the first minute of Saturday. It sits right after Friday night.
Also check the nearest half-hour countdowns:
12 AM vs 12 PM
The clock shows 12 for both, so they get mixed up. They are 12 hours apart. 12 AM is midnight, and 12 PM is noon.
| Detail | 12 AM | 12 PM |
|---|---|---|
| 24-hour clock | 00:00 | 12:00 |
| Minutes after midnight | 0 | 720 |
| Name | Midnight | Noon |
| Marks | Start of the day | Middle of the day |
12 AM in US Time Zones
When it is midnight on the East Coast, the rest of the country is still in the evening. This chart uses standard time.
| Zone | Local time when it is 12:00 AM ET |
|---|---|
| Eastern (ET) | 12:00 AM |
| Central (CT) | 11:00 PM (previous day) |
| Mountain (MT) | 10:00 PM (previous day) |
| Pacific (PT) | 9:00 PM (previous day) |
| Alaska (AKT) | 8:00 PM (previous day) |
| Hawaii (HST) | 7:00 PM (previous day) |
Reverse it: 12 AM in Los Angeles is 3 AM in New York.
12 AM and Daylight Saving Time
US clocks change at 2 AM, so midnight itself is never skipped. The change alters the length of the day around it.
Spring Forward
The day lasts 23 hours, so one 12 AM comes 23 hours after the last. The next start is March 14, 2027.
Fall Back
The day lasts 25 hours, so the next 12 AM arrives an hour later than usual.
Does the Timer Adjust?
Yes. It follows your real clock, so it stays right on both change days.
Why People Count Down to 12 AM
Midnight is a common deadline and due time. People also count down to New Year’s Eve, sale cutoffs and overnight shifts. Many families use it as a curfew.
The timer counts but does not ring. Add an alarm if you need a sound.
FAQs
How long until 12 am right now?
Subtract the current time from 24:00, or read the live timer above.
Is 12am AM or PM?
It is AM; 12 AM is midnight and 12 PM is noon.
How many hours is 12:00 am?
It is 00:00, so zero hours after midnight.
How many seconds until 12?
Multiply the hours left by 3,600 and the minutes by 60, then add the seconds (this assumes 12 AM, not noon).
Is 12 am the start or end of a day?
It is the start of the new day, though some calendars write it as 24:00 for the end of the old one.
How many minutes until 12 AM?
Multiply the full hours left by 60, then add the extra minutes.
What is 12 AM in military time?
It is 0000, the same as 00:00 on the 24-hour clock.
How long is 12 AM to 12 PM?
It is exactly 12 hours.
Amanda Davis is a time management enthusiast dedicated to creating simple, accurate countdown tools that help people track important moments, events, and milestones.
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