How do I average minutes and seconds?

Enter each duration as MM:SS or HH:MM:SS, one per line or separated by commas. 1:30 and 45:00 are one minute thirty seconds and forty-five minutes.

Does this average clock times of day?

No. It averages durations (how long something took). 10:00:00 plus 15:00:00 is treated as 10 hours and 15 hours, not 10 a.m. and 3 p.m.

Can I include milliseconds?

Yes. Use a dot, for example 00:01:10.250. The average keeps millisecond precision when any input has a fraction.

What formula does it use?

Each time is converted to milliseconds, summed, and divided by the number of entries. The result is converted back to HH:MM:SS.

Average Time Calculator

Average a list of durations in HH:MM:SS or MM:SS

Last updated: September 16, 2026

Time values (one per line or comma-separated)

Durations, not times of day. Formats: HH:MM:SS, MM:SS, seconds, optional milliseconds (01:10.250).

Guide

How to use

Paste durations one per line or separated by commas. Mix HH:MM:SS, MM:SS, seconds, and milliseconds.
This averages elapsed time (a lap, a job, a video), not clock times of day.
The example 01:30:00 and 00:45:00 averages to 01:07:30.

Result actions

Copy or download the tool output, or share a link to Calculate Average Time.

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What this calculator averages

It averages durations: lap times, job lengths, video runtimes. It does not find the midpoint between two clock times of day.

Formula

Convert each duration to milliseconds.
Average = (sum of milliseconds) / count.
Convert that mean back to HH:MM:SS, with milliseconds if they are non-zero.

Worked example

Input:

01:30:00
00:45:00

01:30:00 is 5400 seconds. 00:45:00 is 2700 seconds. Mean = 4050 sec>01:07:30.

Formats

You type	Meaning
`01:30:00`	1 hour 30 minutes
`45:30`	45 minutes 30 seconds
`90`	90 seconds
`00:01:10.250`	1 minute 10.250 seconds
`01:30:00, 00:45:00`	two durations on one line

Minutes and seconds must be 0–59 when you use colon notation.

Privacy

The average is computed in your browser. Times are not uploaded.

FAQ

How do I average minutes and seconds?: Enter each duration as MM:SS or HH:MM:SS, one per line or separated by commas. 1:30 and 45:00 are one minute thirty seconds and forty-five minutes.
Does this average clock times of day?: No. It averages durations (how long something took). 10:00:00 plus 15:00:00 is treated as 10 hours and 15 hours, not 10 a.m. and 3 p.m.
Can I include milliseconds?: Yes. Use a dot, for example 00:01:10.250. The average keeps millisecond precision when any input has a fraction.
What formula does it use?: Each time is converted to milliseconds, summed, and divided by the number of entries. The result is converted back to HH:MM:SS.