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Seconds since midnight calculator

World's simplest time tool

With this browser-based application, you can calculate seconds since midnight. You can enter any clock time in 24-hour or 12-hour format and get the exact number of seconds that have passed since midnight. Created by computer nerds from team Browserling.
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Seconds since midnight calculator tool What is a seconds since midnight calculator?
This is a quick online utility for calculating the time since midnight. You can find out how many seconds have passed since midnight for any clock time. Mathematically, for any given clock time, the number of seconds since midnight is equal to the number of seconds in this clock time. For example, the time 01:02:03 will give you 3723 seconds since midnight, because it's calculated as 1h×60×60 + 2m×60 + 3s = 3600 + 120 + 3 = 3723. You can use full clock times consisting of hours:minutes:seconds, such as 14:20:10, and shortened times consisting of hours:minutes, such as 14:20, or just hours, such as 14. You can also use 12-hour clock times, such as 5 am or 2:15 pm. You can calculate seconds since midnight for any number of times in one go, just enter them one by one in a vertical column. Timeabulous!
Seconds since midnight calculator examples Click to use
Find Seconds Since Midnight
In this example, we find the seconds since midnight for six different 24-hour format times. The result of each calculation is printed on the opposite of the original input time.
01:00:00 06:00:00 14:24:36 21:00:30 23:59:45 24:00:00
3600 21600 51876 75630 86385 86400
Find the Time Elapsed in a Day
In this example, we use the 12-hour time format as input. Similarly to the 24-hour format, the program calculates the number of seconds since midnight and prints the results in the output. The number of seconds since midnight is also equal to the number of seconds elapsed in the current day/clock time.
4am 7:20am 2pm 8:10:01pm 11:59:59pm
14400 26400 50400 72601 86399
Pro tips Master online time tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlinetimetools.com/calculate-seconds-since-midnight?input=01%3A00%3A00%0A06%3A00%3A00%0A%0A14%3A24%3A36%0A21%3A00%3A30%0A%0A23%3A59%3A45%0A24%3A00%3A00
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