Average Time Calculator
Calculate the average of multiple time durations entered in HH:MM:SS or MM:SS format. Shows total, count, fastest, and slowest.
Formula
Convert each duration to seconds, compute arithmetic mean, round to nearest second, format as HH:MM:SS.
Assumptions
- All entries use the same time format convention.
- MM:SS treats the first value as minutes (0–59) and the second as seconds (0–59). Use HH:MM:SS for durations over 59 minutes.
Limitations
- Does not weight entries or handle timezone offsets.
Worked example
Average of 1:30 and 2:30
90 seconds + 150 seconds = 240 seconds. Average = 120 seconds = 2:00.
Frequently asked questions
How are durations rounded?
The average is rounded to the nearest whole second before display.
Is 75:30 valid as 75 minutes and 30 seconds?
No. In MM:SS format, minutes must be 0–59. Enter 75 minutes 30 seconds as 1:15:30 in HH:MM:SS format.
Last reviewed: 2026-07-22
Category: Date & Time
Results are provided for informational purposes only and may not reflect real-world policies, fees, or individual circumstances.
Related calculators
Date Difference Calculator
Days between two dates
Time Add and Subtract Calculator
Add and subtract time durations