Ensure
Date & Time

Clock Truncate and Round

Cut a clock time or duration down to the nearest second, minute, quarter hour, half hour or hour.

Write it as hh:mm:ss or hh:mm, for example 13:47:52.

As entered

13:47:52

Truncated down

13:45:00

Rounded to nearest

13:45:00

Details

Step in seconds900
Total seconds49,672
Truncated seconds49,500
Rounded seconds49,500
Seconds dropped by truncating172
Seconds moved by rounding-172
Rounding wentDown

Guides that cover this

Timestamps, time zones and the hour that happens twiceWhat Unix time actually counts, how ISO 8601 offsets differ from IANA time zones, what daylight saving does to alarms and durations, and where storing UTC is the wrong answer.

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