Time Converter●
From a fraction of a second to a few weeks. Convert durations in a moment.
Time
Fixed durations: 1 h = 60 min. 1 day = 24 h. Months, years and time zones need calendar dates.
Definitions: BIPM SI Brochure ↗Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Common conversions
Pick an example to startAll equivalent units
The same value, in every supported unit.
Durations, without calendar guesswork.
Enter decimal hours as a number: 1.5 h means 90 minutes. Months, years and time-zone changes need calendar dates, so this converter uses fixed intervals.
- 1 h
- 60 min
- 1 day
- 24 h
- 1 week
- 7 days
Calculation details & precision
Time conversions use seconds as the base unit. A minute is 60 seconds, an hour is 3,600 seconds and a day here is a fixed interval of 86,400 seconds. A week is 7 such days; a fortnight is 14 days. Calendar months, years and time-zone changes are not part of these calculations.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
Does 1.5 hours mean 1 hour and 50 minutes?
No. The decimal part is a fraction of an hour: 0.5 × 60 = 30 minutes. So 1.5 hours is 1 hour and 30 minutes, or 90 minutes.
Why are months and years not listed?
Calendar months have different lengths, and years may contain 365 or 366 days. Converting a specific calendar interval requires start and end dates, rather than a single fixed factor.
Is a day always 24 hours here?
Yes. This converter treats a day as a fixed duration of 86,400 seconds. A local calendar day can differ when daylight saving time changes; those date and time-zone effects are not calculated.
Can I enter a value such as 01:30?
Use a number rather than a clock format: enter 1.5 with Hours selected, or 90 with Minutes selected. A signed value is accepted for a signed duration.