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Clock time rounder

World's simplest time tool

With this browser-based application, you can round a clock time up, down, or to the nearest time unit. You can select the rounding precision in the options and round the time to 5, 10, or 30 seconds, 1, 5, 10, 15, or 30 minutes, or 1 hour. You can switch between the rounding methods with a single click and get instant results in the output. Created by computer nerds from team Browserling.
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Rounding Precision
Time rounding precision.
Round up to 10 sec: 10:45:24 → 10:45:30 Round up to 1 min: 10:45:24 → 10:46:00 Round up to 10 min: 10:45:24 → 10:50:00 Round up to 1 hour: 10:45:24 → 11:00:00
Rounding Type
Round a clock time up. (Ceil method.)
Round a clock time down. (Floor method.)
Round a clock time to the nearest time unit.
Rounding Examples
Round Up to 1 Min: 10:45:24 → 10:46:00 10:45:54 → 10:46:00 Round Down to 1 Min: 10:45:24 → 10:45:00 10:45:54 → 10:45:00 Round to Nearest Min: 10:45:24 → 10:45:00 10:45:54 → 10:46:00
Clock time rounder tool What is a clock time rounder?
This is a quick online utility for rounding clock times. If you have a list of clock times or timer values in the format hh:mm:ss, then sometimes you don't need these exact values but you need rounded approximate values. For example, you may want to round the seconds and leave just hours and minutes values (hh:mm:00), or you may want to round the minutes as well and leave just the hours values (hh:00:00). To correctly drop seconds and minutes from the time, you need to use the right rounding mode and precision. This program supports the rounding precision to 5 seconds (resulting in hh:mm:s0 or hh:mm:s5), to 10 seconds (resulting in hh:mm:s0), to 30 seconds (resulting in hh:mm:30 or hh:mm:00), to 1 minute (resulting in hh:mm:00), to 5 minutes (resulting in hh:m5:00 or hh:m0:00), to 10 minutes (resulting in hh:m0:00), to 15 minutes (resulting in hh:15:00, hh:30:00, hh:45:00, or hh:00:00), to 30 minutes (resulting in hh:30:00 or hh:00:00), and to 1 hour (resulting in hh:00:00). There are three rounding methods: "Round Up", "Round Down", and "Round to Nearest". The "Round Up" method will always find the next closest time unit. For example, a time "04:15:36" will turn into "04:15:40" (with a precision of 10 seconds). The "Round Down" method will always find the previous closest time unit. For example, a time "04:15:36" will turn into "04:15:30" (with a precision of 10 seconds). The "Round to Nearest" method will find whichever time unit is the closest. For example, a time "04:15:36" will turn into "04:15:40" (with a precision of 10 seconds) and a time "04:15:34" will turn into "04:15:30" (also with a precision of 10 seconds). Timeabulous!
Clock time rounder examples Click to use
Round a Time to 10 Seconds
In this example, we round the given clock times up. We use a precision of ten seconds, which means that each time rounds the second part up to the next nearest 10, 20, 30, 40, 50, or 00 seconds.
12:15:36 04:10:48 01:00:01
12:15:40 04:10:50 01:00:10
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time up. (Ceil method.)
Round a Time to 1 Minute
This example rounds a bunch of times down to 1 minute. As a result, the seconds component of each time becomes zero and the minutes component is rounded down to the previous lowest number. This example also adjusts the clock times which have the minutes and seconds parts exceed the maximum value of 59 minutes or seconds (that is, it works with excessive clock times).
06:35:15 10:10:39 08:50:63 02:65:08
06:35:00 10:10:00 08:51:00 03:05:00
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time down. (Floor method.)
Round a Timer to 1 Hour
In this example, we round several timer values to the nearest hour. When the rounding is performed, the minutes and seconds components disappear and only the rounded hours' values are printed to the nearest whole number.
11:59:59 11:30:00 11:29:00 11:01:01
12:00:00 12:00:00 11:00:00 11:00:00
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time to the nearest time unit.
Round a Time to 5 Minutes
In this example, we round three clock times up to 5 minutes. This rounding precision returns two time formats: "hh:m5:00" or "hh:m0:00".
14:03:04 05:51:55 21:57:00
14:05:00 05:55:00 22:00:00
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time up. (Ceil method.)
Round a Time to 15 Minutes
In this example, we select the rounding precision of 15 minutes and switch to the round-down mode. As a result, the first time is rounded to 15 minutes, the second to 30 minutes, the third to 45 minutes, and the fourth to 00 minutes.
19:20:20 07:33:56 04:50:40 23:09:09
19:15:00 07:30:00 04:45:00 23:00:00
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time down. (Floor method.)
Round a Timer to 30 Minutes
This example rounds each timer to the nearest half an hour. If the minute's value in the timer is less than 15, then the minutes are truncated to 0. If the minutes are from 15 (including) to 45 (not including), then they become 30. If the minutes are greater than 45, then they are truncated to 0 and the hour value is increased by 1h.
12:00:45 10:25:30 22:46:34
12:00:00 10:30:00 23:00:00
Required options
These options will be used automatically if you select this example.
Time rounding precision.
Round a clock time to the nearest time unit.
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/round-clock-time?input=12%3A15%3A36%0A04%3A10%3A48%0A01%3A00%3A01&round-to=to-10-sec&round-up=true
All time tools
Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly visualize your life in weeks or months.
Quickly print a list of neat-looking clock times (such as 10:11:12).
Quickly print a list of neat-looking calendar dates (such as 2055-05-05).
Quickly convert clock time in H:M:S format to seconds.
Quickly convert seconds to clock time in H:M:S format.
Quickly convert time in 24 hour format to 12 hour format.
Quickly convert time in 12 hour format to 24 hour format.
Quickly find how many seconds have passed since midnight.
Quickly find how many seconds are left till midnight.
Quickly find the difference between two clock times.
Quickly find the difference between two calendar dates.
Quickly find the age difference between two or more people.
Quickly add hours, minutes, and seconds to the given time.
Quickly subtract hours, minutes, and seconds from the given time.
Quickly add days, months, and years to the given date.
Quickly subtract days, months, and years to from the given date.
Quickly change the current time format to any new format.
Quickly change the current date format to any new format.
Quickly round the given clock time up or down.
Quickly round the given calendar date up or down.
Quickly drop seconds and minutes from a clock time.
Quickly drop days and months from a calendar date.
Quickly sort clock times in ascending or descending order.
Quickly sort calendar dates in ascending or descending order.
Quickly check if the given clock time is valid.
Quickly check if the given calendar date is valid.
Quickly find how many hours are in the given days.
Quickly find how many days are in the given hours.
Quickly find the astrological sign by the birthday or any date.
Quickly print a list of the dates of all astrological signs.
Quickly find the average value of multiple clock times.
Quickly find the average value of multiple calendar dates.
Quickly generate a list of random clock times.
Quickly generate a list of random calendar dates.
Quickly create a list of clock times that match your criteria.
Quickly generate a list of calendar dates that match your criteria.
Quickly split the given time period into multiple intervals.
Quickly split the given date period into multiple intervals.
Quickly generate increasing or decreasing clock times.
Quickly generate increasing or decreasing calendar dates.
Quickly print a list of all leap years.
Quickly print a list of all common years.
Quickly test if the given year is a leap year.
Quickly test if the given year is a common year.
Quickly find how old a cat would be if it was a human.
Quickly find how old a human would be if he/she was a cat.
Quickly find how old a dog would be if it was a human.
Quickly find how old a human would be if it was a dog.
Quickly convert a modern Gregorian date to a Julian date.
Quickly convert an ancient Julian date to a Gregorian date.
Quickly calculate the Julian day number for any calendar date.
Quickly convert the Julian day to a regular calendar date.
Quickly print a list of all Easter dates for all years.
Quickly convert a UNIX Epoch time to a human-readable time.
Quickly convert human-readable time to a UNIX Epoch time.
Quickly generate increasing or decreasing UNIX timestamps.
Quickly generate one or more random UNIX Epoch times.
Quickly convert a HH:MM:SS clock to a military HHMM clock.
Quickly convert a military clock HHMM to a HH:MM:SS clock.
Coming soon These time tools are on the way
Draw an Analog Clock
Draw an analog clock that shows particular time.
Draw a Digital Clock
Draw a digital clock that shows particular time.
Animate an Analog Clock
Create a GIF animation of an analog clock.
Animate a Digital Clock
Create a GIF animation of a digital clock.
Draw a Calendar
Draw a daily, monthly, or yearly calendar.
Draw a Lunar Calendar
Draw a calendar that shows moon phases.
Create an Animated Timer
Draw an animation that counts down (or up) time.
Draw an Infinite Spiral Clock
Animate a timeless clock that goes in an infinite spiral.
Draw Time as a Pie Chart
Visualize the given clock time as a pie chart.
Draw Current Year as a Pie Chart
Visualize the current year as a pie chart.
Draw Time as a Bar Chart
Visualize the given clock time as a bar chart.
Draw Current Year as a Bar Chart
Visualize the current year as a bar chart.
Draw a Time Arrow
Visualize the given clock time as an arrow.
Visualize Time Intervals
Draw a visualization of multiple time intervals.
Visualize Time Series
Draw a time series chart.
Find Season by a Date
Print the season (winter, spring, summer, autumn) by a date.
Swap Clock Hands
Swap a clock's hour hand with minute hand.
Reverse Clock Time
Find the reverse of the given clock time.
Invert Clock Time
Find the inverse of the given clock time.
Shift Clock Time
Shift the given clock time by any time interval.
Change Clock Scale
Change the clock scale from 24 hours to any other hours.
Generate Valid Clock Times
Generate a list of valid clock times.
Generate Invalid Clock Times
Generate a list of invalid clock times.
Generate Valid Calendar Dates
Generate a list of valid calendar dates.
Generate Invalid Calendar Dates
Generate a list of invalid calendar dates.
Convert English to Crontab
Create a crontab expression from human language.
Convert Crontab to English
Rewrite a crontab entry into human language.
Convert Seconds To Minutes
Find how many minutes are in the given seconds.
Convert Seconds To Hours
Find how many hours are in the given seconds.
Convert Seconds to Days
Find how many days are in the given seconds.
Convert Seconds to Weeks
Find how many weeks are in the given seconds.
Convert Seconds to Months
Find how many months are in the given seconds.
Convert Seconds to Years
Find how many years are in the given seconds.
Convert Minutes to Seconds
Find how many seconds are in the given minutes.
Convert Minutes To Hours
Find how many hours are in the given minutes.
Convert Minutes to Days
Find how many days are in the given minutes.
Convert Minutes to Weeks
Find how many weeks are in the given minutes.
Convert Minutes to Months
Find how many months are in the given minutes.
Convert Minutes to Years
Find how many years are in the given minutes.
Convert Hours To Seconds
Find how many seconds are in the given hours.
Convert Hours to Minutes
Find how many minutes are in the given hours.
Convert Hours to Weeks
Find how many weeks are in the given hours.
Convert Hours to Months
Find how many months are in the given hours.
Convert Hours to Years
Find how many years are in the given hours.
Convert Days to Seconds
Find how many seconds are in the given days.
Convert Days to Minutes
Find how many minutes are in the given days.
Convert Days to Weeks
Find how many weeks are in the given days.
Convert Days to Months
Find how many months are in the given days.
Convert Days to Years
Find how many years are in the given days.
Convert Weeks to Seconds
Find how many seconds are in the given weeks.
Convert Weeks To Minutes
Find how many minutes are in the given weeks.
Convert Weeks To Hours
Find how many hours are in the given weeks.
Convert Weeks to Days
Find how many days are in the given weeks.
Convert Weeks to Months
Find how many months are in the given weeks.
Convert Weeks to Years
Find how many years are in the given weeks.
Convert Months to Seconds
Find how many seconds are in the given months.
Convert Months To Minutes
Find how many minutes are in the given months.
Convert Months To Hours
Find how many hours are in the given months.
Convert Months to Days
Find how many days are in the given months.
Convert Months to Weeks
Find how many weeks are in the given months.
Convert Months to Years
Find how many years are in the given months.
Convert Years to Seconds
Find how many seconds are in the given years.
Convert Years To Minutes
Find how many minutes are in the given years.
Convert Years To Hours
Find how many hours are in the given years.
Convert Years to Days
Find how many days are in the given years.
Convert Years to Weeks
Find how many weeks are in the given years.
Convert Years to Months
Find how many months are in the given years.
Find Week of the Year
Given a calendar date, find which week of the year it is.
Find Day of the Year
Given a calendar date, find which day of the year it is.
Find Day of the Week
Given a calendar date, find which day of the week it is.
Convert a Bird's Age to Human Years
Find how old a human would be if he/she was a bird.
Convert a Human's Age to Bird Years
Find how old a bird would be if it was a human.
Convert Earth Time to Mars Time
Convert clock time on Earth to clock time on Mars.
Convert Mars Time to Earth Time
Convert clock time on Mars to clock time on Earth.
Generate Palindromic Times
Print a list of symmetric clock times.
Generate Palindromic Dates
Print a list of symmetric calendar dates.
Generate Equal H:M:S Times
Print a list of clock times with hrs equal mins equal secs.
Generate Equal Y-M-D Dates
Print a list of calendar dates with yr equal mon equal day.
Calculate Clock Hand Angle
Find the angle between hour hand and minute hand.
Set Clock Hand Angle
Print a list of all clock times with a specific hand angle.
Set Straight Clock Hands
Print a list of all clock times when hands are in a straight line.
Normalize Clock Times
Given clock times in various formats, convert them to one format.
Normalize Calendar Dates
Given calendar dates in various formats, make them the same format.
Spell Clock Times
Write out clock times in full text format.
Spell Calendar Dates
Write out calendar dates in full text format.
Rotate Clock Times
Cyclically shift HH, MM, SS time parts to the left or right.
Rotate Calendar Dates
Cyclically shift YYYY, MM, DD date parts to the left or right.
Freeform Time Calculator
Perform freeform clock time arithmetics.
Freeform Date Calculator
Perform freeform calendar date arithmetics.
Create Zalgo Time
Generate date and time that only Zalgo can understand.