Figuring out time differences is something we all do regularly. Need to know what time it will be in 18 hours from now? This article provides a simple method for calculating the time, no matter where you are.
The formula: Adding time
The basic calculation is simple: Add 18 hours to whatever time it is right now. If the time now is T1, the future time (T2) is T1 + 18 hours.
Keep in mind that adding 18 hours to the current time may mean that you land in the next day.
AM/PM considerations
If you’re working with a 12-hour clock, you’ll need to remember that any result over 12 will require you to subtract 12 and change the AM/PM designation.
Getting the AM/PM right is important if you’re scheduling an appointment or planning a meeting. An incorrect AM/PM designation can cause confusion and miscommunication.
Example: Calculating the time 18 hours from now
Let’s say it’s currently 10:00 AM.
To figure out what time it will be in 18 hours, add 18 hours to 10:00 AM.
10:00 AM + 18 hours = 4:00 AM
Because you’re adding more than 12 hours, the time will be on the next day.
So, 18 hours from 10:00 AM today is 4:00 AM tomorrow.
Frequently Asked Questions
What is 18 hours in regular time?
18 hours is equivalent to three-quarters of a day. Thinking of it another way, it’s a bit longer than a typical workday. If something is scheduled to take 18 hours, you should probably plan for it to take place over two days.
Is 24 hours from now the same time?
Yes, 24 hours from now will be the exact same time as it is right now, but on the next day. It’s a full rotation of the clock. So, if it’s 3 PM on Tuesday, 24 hours from now it will be 3 PM on Wednesday.
What is 18 hours from the time now?
Since time is relative, that depends on the current time. To calculate what time it will be 18 hours from now, add 18 to the current hour. If the result is greater than 24, subtract 24 to get the time in a 24-hour format. Remember to adjust the date accordingly! For example, if it’s 8 AM now, 18 hours from now it will be 2 AM the following day.
How long is 18 hours in days?
18 hours is equal to 0.75 days, or three-quarters of a day. It falls significantly short of a complete day, but it represents a substantial portion of one. This is a handy conversion to know when planning tasks or schedules that span across multiple days.
Final Thoughts
To quickly figure out the time 18 hours from now, just add 18 to the current hour. However, you need to remember to pay close attention to whether the time will be AM or PM, and whether adding 18 hours will push you into the next day.
Knowing how to calculate time this way can be helpful when you’re scheduling meetings, planning travel, or coordinating events with people in other time zones.