Looking at the clock and wondering how long until 1:20? You are not alone. People ask this before a meeting, a class, a bus, a nap alarm, or a late night deadline. The answer depends on one thing: the time it is right now.
This guide gives you the exact method, ready made tables, and mental math shortcuts. You will also learn how to avoid the AM and PM mix up, which causes most wrong answers. Read on, and you will be able to work out the wait in under ten seconds.
Quick Answer: How to Find the Time Left Until 1:20
Here is the fastest way to get your answer:
- Check your current time on your phone or watch.
- Decide if you mean 1:20 AM or 1:20 PM.
- Subtract the current time from 1:20 (use 13:20 for PM).
- Borrow 60 minutes if the minutes do not fit.
- Write the result as hours and minutes.
Example: It is 11:50 AM and you want 1:20 PM. From 11:50 to 12:00 is 10 minutes. From 12:00 to 1:20 is 1 hour 20 minutes. Total wait: 1 hour 30 minutes.
Profile Summary Table
This table gives you the key facts about the topic at a glance. It is current as of October 29, 2026.
| Detail | Information |
| Topic | Countdown to 1:20 on the clock |
| Main variable | Your current local time |
| Two possible targets | 1:20 AM (01:20) and 1:20 PM (13:20) |
| Core formula | Target time minus current time |
| Longest possible wait | 23 hours 59 minutes |
| Most common mistake | Mixing up AM and PM |
| Best tools | Phone clock, timer app, search engine time calculator |
| Skill level | Beginner |
| Time to calculate by hand | About 10 seconds |
| Last reviewed | October 29, 2026 |
How to Calculate the Time Until 1:20
You do not need a special app. A little arithmetic is enough, and it works for any target time, not only 1:20.
The Step by Step Method
Follow this simple process:
- Step 1: Convert both times to the same format. A 24 hour format is the safest.
- Step 2: Turn each time into total minutes if you like numbers. For example, 1:20 PM is 13 hours and 20 minutes, which equals 800 minutes.
- Step 3: Subtract your current time in minutes from the target in minutes.
- Step 4: Convert the answer back into hours and minutes by dividing by 60.
Worked example: Now it is 9:45 AM. That equals 585 minutes. The target 1:20 PM equals 800 minutes. The difference is 215 minutes. Divide by 60 and you get 3 hours and 35 minutes.
The Mental Math Shortcut
Most people prefer a faster trick. Use the round to the hour method:
- Count the minutes from now to the next full hour.
- Count the full hours from that point until the hour before 1:20.
- Add the final 20 minutes.
Take 10:35 AM as the start. From 10:35 to 11:00 is 25 minutes. From 11:00 to 1:00 PM is 2 hours. Then add 20 minutes. Your total is 2 hours 45 minutes.
This approach feels natural because we think in hours on a clock face. It also cuts down on borrowing errors.
Time Left Until 1:20 PM
Most people searching this phrase mean the afternoon time. Use this table to find your answer fast.
| If the time now is | Time left until 1:20 PM |
| 6:00 AM | 7 hours 20 minutes |
| 8:00 AM | 5 hours 20 minutes |
| 9:00 AM | 4 hours 20 minutes |
| 10:00 AM | 3 hours 20 minutes |
| 11:00 AM | 2 hours 20 minutes |
| 12:00 PM | 1 hour 20 minutes |
| 12:30 PM | 50 minutes |
| 12:45 PM | 35 minutes |
| 1:00 PM | 20 minutes |
| 1:10 PM | 10 minutes |
If your current time falls between two rows, simply adjust the minutes up or down.
Time Left Until 1:20 AM
If you work late, study at night, or travel overnight, you probably mean 1:20 in the early morning. The countdown crosses midnight, so be careful here.
| If the time now is | Time left until 1:20 AM |
| 6:00 PM | 7 hours 20 minutes |
| 8:00 PM | 5 hours 20 minutes |
| 10:00 PM | 3 hours 20 minutes |
| 11:00 PM | 2 hours 20 minutes |
| 11:30 PM | 1 hour 50 minutes |
| 12:00 AM (midnight) | 1 hour 20 minutes |
| 12:30 AM | 50 minutes |
| 12:50 AM | 30 minutes |
Tip: When the countdown passes midnight, split it into two parts. Count the time until midnight first, then add 1 hour 20 minutes.
1:20 AM vs 1:20 PM: Know the Difference
The two targets sit exactly 12 hours apart. Picking the wrong one can change your answer by half a day. That is why clear labeling matters.
Also Read This: How Long Until 7 PM
Use the 24 Hour Clock to Stay Safe
The 24 hour clock removes all confusion. Here is how the two times look:
- 1:20 AM is written as 01:20
- 1:20 PM is written as 13:20
If your phone or computer shows 24 hour time, your math becomes cleaner. Subtract directly without thinking about AM or PM.
What If 1:20 Has Already Passed?
Sometimes you check the time at 2:00 PM and ask about 1:20. The next 1:20 PM is tomorrow, so the wait is long.
| Current time | Next 1:20 PM | Next 1:20 AM |
| 2:00 PM | 23 hours 20 minutes | 11 hours 20 minutes |
| 5:00 PM | 20 hours 20 minutes | 8 hours 20 minutes |
| 9:00 PM | 16 hours 20 minutes | 4 hours 20 minutes |
When the target has already passed today, add 24 hours to it before you subtract. That one rule solves almost every case.
Common Mistakes When Counting Time
Small slips can ruin a good calculation. Watch out for these:
- Treating 60 like 100. Minutes run from 0 to 59. Do not borrow 100.
- Forgetting the noon switch. After 12:59 PM comes 1:00 PM, not 13:00 PM written twice.
- Ignoring the date change. Crossing midnight adds a new day.
- Using the wrong time zone. If you plan a call with someone abroad, confirm whose 1:20 you mean.
- Skipping daylight saving shifts. In regions that change clocks, a night countdown may gain or lose an hour.
I have seen many people miss a meeting simply because they counted the wait from the wrong time zone. Always confirm the zone first.
Best Tools to Check How Long Until 1:20
You can do the math by hand, but tools save effort when you are busy.
- Phone timer. Set it for the exact number of hours and minutes you calculated. It rings when 1:20 arrives.
- Alarm app. Set an alarm directly at 1:20 AM or 1:20 PM. This skips the math entirely.
- Voice assistant. Ask your phone, “How long until 1:20 PM?” and it replies instantly.
- Search engine time tools. Many search engines include a built in countdown or time difference calculator.
- World clock apps. These help when the target time sits in another country.
For critical tasks, use two methods. Calculate by hand, then confirm with a timer. That habit builds trust in your answer.
Why People Count Down to 1:20
The reason behind your search shapes the best method. Here are common situations:
- Lunch breaks. Many workplaces schedule meals around 1:20 PM, so employees watch the clock closely.
- School periods. Class timetables often use odd times like 1:20 for the start of an afternoon period.
- Travel. Flights, trains, and buses run at precise minutes, and a 1:20 departure needs planning.
- Sleep and naps. Short rest plans, such as a 20 minute nap, often depend on a fixed wake time.
- Online meetings. Remote teams across time zones must convert and count down carefully.
- Cooking and tasks. Some people plan a recipe or errand to finish exactly at 1:20.
Whatever the case, the same simple formula applies.
Practical Tips From Experience
After years of helping students and professionals plan their schedules, a few habits stand out:
- Write the target in 24 hour format. It prevents AM and PM errors.
- Add a buffer. Aim to be ready 5 to 10 minutes before 1:20.
- Set two alerts. One for 30 minutes before and one at the exact time.
- Say the answer out loud. Hearing “two hours and twenty minutes” helps catch a silly mistake.
- Recheck after midnight. Your brain is slower at night, so slow down and verify.
These small steps make a big difference, especially when the stakes are high.
Conclusion
Finding out how long until 1:20 is easy once you know the pattern. Check your current time, choose between 1:20 AM and 1:20 PM, subtract, and borrow 60 minutes when needed. For faster results, use the round to the hour shortcut or the ready made tables above.
Remember the three golden rules: use 24 hour time when unsure, add a day if the target has passed, and confirm the time zone. Follow them, and you will never miscount again. Bookmark this page, and the next time the clock makes you curious, your answer will be seconds away.
Frequently Asked Questions
How long until 1:20 PM if it is 12:00 PM now?
The wait is 1 hour 20 minutes. Noon to 1:20 PM is exactly that long.
How many minutes are there from 1:00 PM to 1:20 PM?
There are 20 minutes. Simply subtract 1:00 from 1:20 on the same hour.
How do I calculate time left across midnight?
Count the time until midnight, then add the time from midnight to the target. For 1:20 AM, that second part is 1 hour 20 minutes.
What is 1:20 PM in 24 hour time?
It is 13:20. Add 12 to the hour for any PM time after noon.
What is the longest wait possible for 1:20?
The longest wait is 23 hours 59 minutes. That happens when 1:20 has just passed and you wait for the next one.