Time Unit Converter for Seconds, Minutes, Hours & HH:MM:SS
Convert seconds to hours, hours to seconds, minutes to hours, HH:MM:SS to seconds, and seconds back to HH:MM:SS for schedules, logs, media notes, and formulas.
Try a common time conversion
Result
1 hours
3,600 seconds = 1 hours
days
0
hours
1
minutes
0
seconds
0
Reference formulas
hours = seconds / 3600
seconds = hours x 3600
HH:MM:SS = hours:minutes:seconds from total seconds
Seconds to hours uses seconds divided by 3,600.
Hours to seconds uses hours multiplied by 3,600.
Use decimal values for units
Values such as 1.5 hours, 90 minutes, and 5400 seconds convert cleanly.
Use HH:MM:SS for clock-style duration text
A value like 01:30:00 converts to 5,400 total seconds.
hours = seconds / 3600
seconds = hours x 3600
Minutes, days, and weeks convert through the same shared base: total seconds.
Use this page when the query is about converting time units, especially seconds, minutes, hours, or HH:MM:SS text.
Use the duration calculator when the job is adding or subtracting multiple elapsed times.
Example
5,400 seconds divided by 3,600 equals 1.5 hours, which is also 01:30:00.
Assumption
The converter treats HH:MM:SS as elapsed duration text, not a time zone or calendar timestamp.
Limitation
This page does not calculate clock-time differences between two dates or time zones.
Treating HH:MM:SS as clock time
HH:MM:SS is handled as elapsed duration text here, not a date-time, time zone, or clock appointment.
Dropping decimal hours
1.5 hours means 1 hour 30 minutes. Do not read decimal hours as hours and minutes without converting.
Confusing this with date differences
Use the time duration calculator when you need the difference between two dates or two times.
Video notes
Convert clip seconds to HH:MM:SS labels for edit notes.
Logs and exports
Convert second-based event data into human-readable durations.
Learning plans
Turn minutes and hours into consistent planning values.
Formula cleanup
Move between seconds, minutes, hours, days, and weeks before spreadsheet work.
How many seconds are in an hour?
There are 3,600 seconds in one hour.
How many hours are in 90 minutes?
90 minutes equals 1.5 hours.
Can I convert 01:30:00 to seconds?
Yes. 01:30:00 equals 5,400 seconds.
Is this different from the add/subtract time calculator?
Yes. This page converts units and HH:MM:SS values. The add/subtract time calculator starts with one date-time and applies an offset.
Suggested workflow
Time cleanup workflow
Convert raw time units, then use the result for duration checks, date-time offsets, playback planning, or editing totals.