Wondering how long until 1:20? The answer depends on the time right now. Just subtract the current time from 1:20, and the difference is your wait. If it is 12:20, you wait one hour. If it is 1:00, you wait only 20 minutes.
This guide gives you simple steps and easy tables to work it out fast. You will also see how to pick between 1:20 AM and 1:20 PM, and how to count across midnight. Each method is short, clear, and easy to repeat. Let’s get started.
Table of Contents Summary
| Section | What You Will Learn |
| Quick Answer | The fastest way to find your wait |
| At-a-Glance Table | Time until 1:20 from common hours |
| Step by Step Method | A simple formula you can reuse |
| AM vs PM | How to pick the right 1:20 |
| Real-Life Examples | Practical scenarios |
| Military Time | 01:20 and 13:20 explained |
| Mistakes and Do’s and Don’ts | What to avoid |
| FAQs | Quick answers |
Quick Answer: How Long Until 1:20?
Answer Block
To find how long until 1:20, subtract the current time from 1:20. If it is 12:20, you wait one hour. If it is 1:00, you wait 20 minutes. If 1:20 has already passed today, count forward to 1:20 the next day by adding 24 hours to the target.
Quick Reference Table
| Feature | Details |
| Target time | 1:20 (AM or PM) |
| Core formula | Target time minus current time |
| Past 1:20 already? | Add 24 hours to the target |
| Best tool | Phone clock, timer, or alarm |
| Common trap | Confusing AM with PM |
Time Until 1:20 From Common Starting Points
Here is a fast lookup. These work for both 1:20 AM and 1:20 PM, as long as the starting time is earlier in the same half of the day.
Countdown Table (Hours Before 1:20)
| Current Time | Time Until 1:20 | In Minutes |
| 12:20 | 1 hour | 60 |
| 12:30 | 50 minutes | 50 |
| 12:45 | 35 minutes | 35 |
| 1:00 | 20 minutes | 20 |
| 1:10 | 10 minutes | 10 |
| 1:15 | 5 minutes | 5 |
| 11:20 | 2 hours | 120 |
| 10:20 | 3 hours | 180 |
| 9:20 | 4 hours | 240 |
Countdown Table (Short Waits)
| Current Time | Wait |
| 1:19 | 1 minute |
| 1:18 | 2 minutes |
| 1:17 | 3 minutes |
| 1:10 | 10 minutes |
| 1:05 | 15 minutes |
| 1:00 | 20 minutes |
How to Calculate the Time Until 1:20
You do not need a calculator. Follow these steps.
Step by Step Method
- Write down the current time. Example: 11:45.
- Find the next full hour. From 11:45, that is 12:00, which is 15 minutes away.
- Add the hours to the target. From 12:00 to 1:00 is 1 hour.
- Add the final minutes. From 1:00 to 1:20 is 20 minutes.
- Total it up. 15 + 60 + 20 = 95 minutes, or 1 hour 35 minutes.
The Hour Bridge Trick
When the clock crosses 12, people often slip up. Use 12:00 as a stepping stone.
- Count minutes to 12:00.
- Add the hours between 12:00 and 1:00.
- Add 20 minutes for the final stretch.
Worked Examples Table
| Current Time | Steps | Total Wait |
| 12:50 | 10 min to 1:00, plus 20 | 30 minutes |
| 11:30 | 30 min to 12:00, plus 60, plus 20 | 1 hour 50 minutes |
| 10:00 | 2 hours to 12:00, plus 60, plus 20 | 3 hours 20 minutes |
| 8:15 | 3 hr 45 min to 12:00, plus 60, plus 20 | 5 hours 5 minutes |
AM or PM: Which 1:20 Do You Mean?
This is where most errors happen. A day has two 1:20 moments.
- 1:20 AM is early morning, just after midnight.
- 1:20 PM is early afternoon, just after noon.
AM vs PM Comparison Table
| Detail | 1:20 AM | 1:20 PM |
| Part of day | Overnight | Afternoon |
| 24 hour format | 01:20 | 13:20 |
| Typical context | Late shifts, flights, night owls | Lunch meetings, school, appointments |
| Starts counting from | Midnight (12:00 AM) | Noon (12:00 PM) |
Quick Rule to Remember
If it is currently before 1:20 PM today, the next 1:20 PM is today. If it is after 1:20 PM, the next 1:20 AM is the closer one, because midnight is coming up.
Time Until 1:20 Across Midnight
Sometimes 1:20 is tomorrow. Say it is 9:00 PM and you want to know the wait until 1:20 AM.
Crossing Midnight Example
- From 9:00 PM to midnight is 3 hours.
- From midnight to 1:20 AM is 1 hour 20 minutes.
- Total: 4 hours 20 minutes.
Late Night Countdown Table
| Current Time | Until 1:20 AM |
| 8:00 PM | 5 hours 20 minutes |
| 9:00 PM | 4 hours 20 minutes |
| 10:00 PM | 3 hours 20 minutes |
| 11:00 PM | 2 hours 20 minutes |
| 11:40 PM | 1 hour 40 minutes |
| 12:00 AM | 1 hour 20 minutes |
Military Time: 01:20 and 13:20
Many schedules, hospitals, and transport systems use the 24 hour clock. It removes the AM and PM confusion.
24 Hour Conversion Table
| 12 Hour Time | 24 Hour Time |
| 1:20 AM | 01:20 |
| 1:20 PM | 13:20 |
| 12:20 AM | 00:20 |
| 12:20 PM | 12:20 |
Quick Subtraction in 24 Hour Format
With 13:20 as your target, subtract directly. If it is 09:20, then 13:20 minus 09:20 equals 4 hours. No AM or PM guessing needed.
Real-Life Examples
Real situations make the math easier to remember.
Example 1: Lunch Meeting
You have a meeting at 1:20 PM. It is 10:50 AM now. That is 1 hour 10 minutes to 12:00, plus 1 hour 20 minutes. Wait: 10:50 to 12:00 is 1 hour 10 minutes, then 12:00 to 1:20 is 1 hour 20 minutes. Total: 2 hours 30 minutes.
Example 2: Overnight Flight
Your flight leaves at 1:20 AM. It is 10:30 PM. From 10:30 PM to midnight is 1 hour 30 minutes. Add 1 hour 20 minutes. Total: 2 hours 50 minutes.
Example 3: Class Starting Soon
Class begins at 1:20 PM. It is 1:05 PM. Subtract directly: 15 minutes left.
Scenario Summary Table
| Scenario | Start | Target | Wait |
| Lunch meeting | 10:50 AM | 1:20 PM | 2 hr 30 min |
| Overnight flight | 10:30 PM | 1:20 AM | 2 hr 50 min |
| Class | 1:05 PM | 1:20 PM | 15 min |
| Night shift break | 12:00 AM | 1:20 AM | 1 hr 20 min |
Easy Tools to Check the Time Until 1:20
You can skip the math entirely with these options.
- Phone alarm: Set it for 1:20 and let it ring.
- Voice assistant: Ask “How long until 1:20?” and get an instant reply.
- Timer app: Enter the wait you calculated and start it.
- Online time calculator: Type your start and end times.
Tool Comparison Table
| Tool | Speed | Best For |
| Mental math | Fast for short waits | Quick checks |
| Phone alarm | Very fast | Staying on time |
| Voice assistant | Instant | Hands free use |
| Timer app | Fast | Exact countdowns |
Common Mistakes and Do’s and Don’ts
Small slips cause big scheduling problems. Watch for these.
Do’s and Don’ts Table
| Do | Don’t |
| Confirm AM or PM first | Assume which 1:20 you mean |
| Use 12:00 as a stepping stone | Subtract hours and minutes in one jump |
| Double check across midnight | Forget the date changes |
| Set an alarm as backup | Rely only on memory |
| Use 24 hour time for clarity | Mix formats in one calculation |
Mistakes to Avoid
- Treating 60 as 100. Minutes roll over at 60, not 100. From 12:50, the wait to 1:20 is 30 minutes, not 70.
- Skipping the AM and PM check. This is the top cause of wrong answers.
- Forgetting 12:20 is just before 1:20. The clock goes from 12 to 1, not 12 to 13, in 12 hour format.
Frequently Asked Questions
How long until 1:20 if it is 1:00?
20 minutes.
How long until 1:20 if it is 12:20?
1 hour.
How many minutes until 1:20 from 12:00?
80 minutes, which is 1 hour 20 minutes.
What if 1:20 has already passed?
Count to 1:20 the next day. Add 24 hours to the target time before you subtract.
Is 1:20 PM the same as 13:20?
Yes. In 24 hour time, 1:20 PM is written as 13:20.
Conclusion
Figuring out how long until 1:20 is simple once you know the method. Subtract the current time from 1:20, use 12:00 as your stepping stone, and always confirm AM or PM first.
Keep the tables above handy for quick checks. When timing really matters, set an alarm so you never miss it.
