Quick answer
Average time = sum of durations ÷ count. 1:30, 2:00 and 0:45 total 4:15, so the average is 1:25:00.
Enter durations separated by commas. The calculator returns the average and the number of entries.
Related tools: Add Times Calculator: Total of several durations in hours, minutes and seconds. Subtract Times Calculator: Difference between two durations. Time Card Calculator: Total hours, overtime and gross pay from daily start and end times.
How to use the Average Time Calculator
- Type times to average (h:mm or h:mm:ss), for example 1:30, 0:45:30, 2:15.
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Times to average (h:mm or h:mm:ss) | Text, such as 1:30, 0:45:30, 2:15 | — |
Formula and method
Formula
average = Σ durations ÷ count
IEEE-754 double precision; shown to the decimals indicated.
Useful for lap times and task durations.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Times to average (h:mm or h:mm:ss) = 1:30, 2:00, 0:45.
| Result | Value |
|---|---|
| Average time | 1:25:00 |
| Entries | 3 |
Example 2
Inputs: Times to average (h:mm or h:mm:ss) = 0:10:30, 0:11:30.
| Result | Value |
|---|---|
| Average time | 0:11:00 |
| Entries | 2 |
Example 3
Inputs: Times to average (h:mm or h:mm:ss) = 8:00.
| Result | Value |
|---|---|
| Average time | 8:00:00 |
| Entries | 1 |
The first line is the headline result (average time). Below it the average Time Calculator lists entries, which describe the same case from other angles. IEEE-754 double precision; shown to the decimals indicated.
Worked example
4 h 15 min is 255 minutes, and 255 ÷ 3 = 85 minutes, which is 1:25.
Durations only
It averages durations, not clock times; averaging clock times around midnight needs circular statistics.
Averaging durations
The average of 1:30, 2:00 and 0:45 is 4:15 ÷ 3 = 1:25. Lap times of 1:30, 1:32 and 1:28 average 1:30 exactly.
Like any mean, the average is pulled by outliers, so one very slow entry can distort it.
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Times to average (h:mm or h:mm:ss): left empty shows "Enter times to average (h:mm or h:mm:ss)." beside that field and no result.
Choosing between the Average Time Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Add Times Calculator](/time/add-times-calculator/) | times to add | Total time |
| [Subtract Times Calculator](/time/subtract-times-calculator/) | time and time to subtract | Difference |
| [Time Card Calculator](/time/time-card-calculator/) | start times, end times and unpaid break per day | Total time |
| [Time From Now Calculator](/time/minutes-from/) | start time and minutes to add | Resulting time |
| [Time Allocation Calculator](/time/time-allocation-calculator/) | total time, activity 1 and activity 2 | Activity 1 |
Background: dates and times
Date and time results depend on the conventions a tool uses: whether the end date counts, whether weekends and holidays are skipped, how months of different lengths are handled and whether time zones are applied. This page states its convention, and the worked examples show it.
Dates use the Gregorian calendar and calendar days unless the page says otherwise; check deadlines against the rule in your contract or regulation.
Assumptions and limitations
- Durations only, not clock times
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for times to average (h:mm or h:mm:ss) to confirm this.
Frequently asked questions
Average of 0:50 and 1:10?
The average of 0:50 and 1:10 is (50 + 70) ÷ 2 = 60 minutes, or 1:00.
How many entries can I use?
As many as you like.
Is it the mean?
Yes. It is the arithmetic mean of the durations: the sum divided by how many there are.
What is the average of 1:30, 1:32 and 1:28?
The total is 4:30, divided by 3 gives 1:30.
Should I use the median instead?
If a few entries are unusually long or short, the median may describe a typical time better.
What does the Average Time Calculator calculate?
Average of several durations. It returns Average time and Entries.
What formula does the Average Time Calculator use?
average = Σ durations ÷ count. Useful for lap times and task durations.
What do I need to enter in the average Time Calculator?
You enter Times to average (h:mm or h:mm:ss).
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Durations only, not clock times.
What is an example of a average Time result?
With times to average (h:mm or h:mm:ss) 1:30, 2:00, 0:45, the average time is 1:25:00.
Related calculators
- Add Times Calculator — Total of several durations in hours, minutes and seconds.
- Subtract Times Calculator — Difference between two durations.
- Time Card Calculator — Total hours, overtime and gross pay from daily start and end times.
- Time From Now Calculator — Clock time after adding or subtracting minutes.
- Time Allocation Calculator — Split a block of time between activities by percentage.
- Time Duration Calculator — Elapsed time between two clock times, including across midnight.
- Time Zone Meeting Planner — The same meeting time in several time zones.
Sources
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI): minute, hour and day are non-SI units accepted for use with the SI (60 min = 1 h, 24 h = 1 d)
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.