Use our minutes from now calculator to determine the exact time and date a specific number of minutes from the current moment.

On this page

How to Subtract Minutes

There are many times in daily life when you might need to figure out what the time was a certain number of minutes ago – whether to calculate elapsed time, review past events, or plan schedules. To correctly subtract minutes from the current time, it helps to understand how time measurement works:

  • There are 60 minutes in an hour – if you’re working with hours instead, you can use an hours ago calculator
  • The day is divided into two 12-hour segments – AM (midnight to noon) and PM (noon to midnight)
  • In the 24-hour format, hours are numbered from 00 to 23 with no AM or PM indicators

To find out what the time was a certain number of minutes ago, follow these simple steps:

Step One: Identify the Starting Time

Begin with the exact time you’re starting from this could be the current time or another specific point in time.

For example, let’s say the starting time is 3:00 PM.

Step Two: Break Down the Minutes Into Hours and Minutes

If you’re subtracting a large number of minutes, first convert them into hours and minutes. Since 60 minutes equal one hour, divide the total minutes by 60. The quotient will be the number of hours, and the remainder will be the remaining minutes to subtract.

For example, subtracting 90 minutes:

90 ÷ 60 = 1 hour and 30 minutes

Step Three: Subtract Hours From the Starting Time

Now, subtract the hours from your starting time.

3:00 PM – 1 hour = 2:00 PM

Step Four: Subtract the Remaining Minutes

Next, subtract the leftover minutes.

2:00 PM – 30 minutes = 1:30 PM

So, 90 minutes ago from 3:00 PM is 1:30 PM.

Special Considerations

Crossing the AM/PM boundary requires a little extra attention. If subtracting minutes causes the time to move from PM into AM (or vice versa), remember to switch the designation.

For example:
Subtracting 90 minutes from 12:30 AM would result in 11:00 PM of the previous day.

When working with the 24-hour format, the calculation is straightforward since there is no AM/PM shift — just subtract the appropriate number of minutes and adjust backward across hours or days if necessary.

Keep in mind that subtracting a large number of minutes might push the time back into the previous day. For example, 150 minutes ago from 1:00 AM (01:00) is 10:30 PM of the day before.