Elapsed Time Calculator
Welcome to the elapsed time calculator, which will help you calculate durationrelated problems like, for example, elapsed time word problems.
If you still don't know what we mean by elapsed time, you can look at the elapsed time definition in the following section.
What is elapsed time? Definition
Elapsed time means the amount of time between two events. For example, if you go to bed at 10 PM and wake up at 6 AM, the elapsed time between those events is 8 hours.
How do I solve elapsed time word problems with this calculator?
The way to solve elapsed time word problems will depend on the available information:
 If you know the initial and final hours of the event and need to calculate the event duration, use the "Clock time duration" functionality and input the start and end clock times.
 If you know the duration and initial time and need to calculate the final time, use the "Elapsed time duration calculator" functionality and follow these steps:
 Convert the initial time to 24h format and input it in the "Start time" field.
 Input the duration of the event in the "Duration field".
 The Elapsed time calculator will find the final time for you.
 If you know the duration and final time and need to calculate the initial time, use the "Elapsed time duration calculator" functionality and follow these steps:
 Convert the final time to 24h format and input it in the "Start time" field.
 Input the duration of the event in the "Duration field".
 The calculator will find the initial time for you.
Other tools similar to this elapsed time calculator
FAQ
What is the elapsed time between 3 40 AM and 2 00 PM?
10 hours and 20 minutes. Explanation:
 The first step is converting everything to 24h format:
 3:40 AM = 3:40.
 2:00 PM = 14:00.

Find the difference between the final and initial times, as in a manual math subtraction:
14:00
3:40

11:40
Not a valid time. 
As we obtained an invalid result (negative minutes), convert an hour from the final hour to 60 minutes so you can get a positive and valid result:
13:60
3:40

10:20
How do I calculate elapsed time between two hours?
To calculate the elapsed time between two hours:

Convert everything to 24h format.

Subtract the initial from the final hour as with a math subtraction. E.g., to calculate the elapsed time between 8:13 and 16:55 hours:
16:55
8:13

8:42

If the subtraction result is negative, as in this case:
14:00
3:40

11:40
Convert an hour of the final hour to 60 minutes to get a positive and correct result:
13:60
3:40

10:20