Time Calculator

Count the hours and minutes between two times, add up or subtract a list of times, or find the clock time a set number of hours from now.

Start time
End time
Unpaid break
min

Taken off the total, such as a lunch break.

8:00hours and minutes

From 9:00 AM to 5:00 PM is 8 hours.

The same time as

Written out
8 hours
Decimal hours
8
Minutes
480
Seconds
28,800

Working

  1. Start: 9:00 AM
  2. End: 5:00 PM
  3. Time between: 8:00
Start date
End date

For spans over a day. Without dates, an end time before the start is the next day.

Clock
12-hour (AM/PM)24-hour

Answers change as you type, with breaks taken off and shifts past midnight counted the right way.

A free time calculator online: no sign-up, and the times you enter never leave this page.

  • Hours, minutes and decimal hours
  • Overnight shifts counted correctly
  • 8, 24, 48 or 72 hours from now

How to calculate time

Pick the tab for the job: the time between two times, a list of times to add up, or a time from now.

  1. Enter the two times

    Type a start and an end time. The hours and minutes between them appear at once, with any break taken off.

  2. Add hours and minutes

    Open Add time and type each time in hours, minutes and seconds. Tap the + on a row to make it a minus.

  3. Count hours from now

    Open From now, then type hours or tap 8, 24 or 48. The clock time shows with its weekday and its date.

How many hours between two times?

Subtract the start time from the end time. From 8:45 AM to 5:15 PM is 8 hours 30 minutes, which this time duration calculator also writes as 8.5 hours, 510 minutes and 30,600 seconds, so the answer fits a timesheet, an invoice or a log.

When the end time is earlier than the start, the span runs past midnight into the next day: 10:00 PM to 6:00 AM is 8 hours, not minus 16. For longer spans, set a start and an end date under the times and the elapsed time runs across as many days as it needs.

Type an unpaid break in minutes and it comes off the total, so a 9 to 5 day with a 30 minute lunch is 7 hours 30 minutes. Time zones and clock changes are left out: both times are read on the same clock.

Convert time to decimal hours

Payroll and billing software often wants hours as a decimal. Divide the minutes by 60 and add them to the whole hours: 7 hours 45 minutes is 7.75 hours, and 40 minutes is 0.67. Every answer here shows its decimal hours, rounded to two places.

A common slip is to type 8:15 as 8.15. Fifteen minutes is a quarter of an hour, so the right figure is 8.25, and the gap adds up over a month of timesheets. Copy the decimal row instead of rewriting the clock time by hand.

The same rows work as a minutes to hours converter: type 135 minutes in Add time and it reads as 2 hours 15 minutes, 2.25 decimal hours and 8,100 seconds. Seconds work too, so 5,400 seconds shows as 1 hour 30 minutes.

What time will it be in 8 hours?

Open From now: the start is already the current time on your device. Type 8 hours, or tap a quick button, and the answer shows the clock time with its weekday and date, so you know at once when a shift, a flight or a fast ends.

Times past midnight move to the next day, and longer amounts keep counting through the calendar: 48 hours from now and 72 hours from now land on the same clock time two or three days later. Choose Subtract to find a time before, such as 36 hours ago.

What this hours calculator does

  • Shifts past midnight

    An end time earlier than the start is read as the next day, so 11 PM to 7 AM gives 8 hours, not -16.

  • Take off a lunch break

    Type the unpaid minutes and they come off the span: a 7 to 3 shift with a 30 minute lunch is 7:30.

  • Minutes and seconds too

    Add up track lengths, lap times or video clips in hours, minutes and seconds; 90 seconds is 1:30.

  • Totals past 24 hours

    A total keeps counting past one day, so 20 hours plus 8 hours is 28:00, also shown as 1 day 4 hours.

  • 12 or 24-hour clock

    Clock times show as 5:30 PM or as 17:30. It follows your device at first; switch it in the settings.

  • Time between two dates

    Add a start and an end date to count the hours over several days, like a trip from Friday 6 PM on.

Your times stay on this page

Every sum runs in this tab, so nothing you type is sent anywhere.

  • Processing

    Each sum is worked out by code in this browser tab. The times you type are never sent to a server.

  • Storage

    Nothing is stored. Refresh or close the page and every time, break and date you entered is gone.

  • Account

    A free time calculator with no sign-up and no email. Use it for every shift, timesheet or deadline.

Questions about hours and minutes

How many hours is 9 to 5?

8 hours from 9:00 AM to 5:00 PM. Take off a 30 minute unpaid lunch and the working day is 7 hours 30 minutes.

How many hours is 10pm to 6am?

8 hours: 2 before midnight and 6 after it. Enter 10:00 PM and 6:00 AM above and the next day is counted for you.

What is 45 minutes in decimal?

0.75 hours, since 45 divided by 60 is 0.75. In the same way 15 minutes is 0.25, 30 minutes is 0.5 and 40 is 0.67.

How do you add time?

Add the seconds, minutes and hours apart. Each 60 seconds carries one minute and each 60 minutes one hour: 50 + 25 min is 1:15.

How do you subtract time?

Take away each unit, borrowing 60 when one runs short: 3:10 minus 1:45 becomes 2:70 minus 1:45, which is 1 hour 25 minutes.

How do I add time in Excel?

Type the times as h:mm and use =SUM(A2:A10). Format the total cell as [h]:mm, or totals past 24 hours start again from 0.

How do I convert minutes to hours?

Divide by 60. The whole number is the hours and the rest is minutes: 135 minutes is 2.25 hours, or 2 hours 15 minutes.

How many hours is 8am to 5pm?

9 hours. With a one hour unpaid lunch it is 8 working hours, and five of those days make the usual 40-hour week.

Still stuck, or found a problem? Email dobliquestudio@gmail.com and we will help.

More date and time calculators