Time Converter
unit-converter
Convert between seconds, minutes, hours, days, weeks, months, years, and more. All Unit Conversions panel included.
Convert Time
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All Unit Conversions
Dedicated converters (year, month, week, day, hour, minute, second, millisecond)
56 pages — every pair of units below, with fixed input/output, formulas, examples, and conversion tables.
- year to month (Year to Month)
- year to week (Year to Week)
- year to day (Year to Day)
- year to hour (Year to Hour)
- year to minute (Year to Minute)
- year to second (Year to Second)
- year to millisecond (Year to Millisecond)
- month to year (Month to Year)
- month to week (Month to Week)
- month to day (Month to Day)
- month to hour (Month to Hour)
- month to minute (Month to Minute)
- month to second (Month to Second)
- month to millisecond (Month to Millisecond)
- week to year (Week to Year)
- week to month (Week to Month)
- week to day (Week to Day)
- week to hour (Week to Hour)
- week to minute (Week to Minute)
- week to second (Week to Second)
- week to millisecond (Week to Millisecond)
- day to year (Day to Year)
- day to month (Day to Month)
- day to week (Day to Week)
- day to hour (Day to Hour)
- day to minute (Day to Minute)
- day to second (Day to Second)
- day to millisecond (Day to Millisecond)
- hour to year (Hour to Year)
- hour to month (Hour to Month)
- hour to week (Hour to Week)
- hour to day (Hour to Day)
- hour to minute (Hour to Minute)
- hour to second (Hour to Second)
- hour to millisecond (Hour to Millisecond)
- minute to year (Minute to Year)
- minute to month (Minute to Month)
- minute to week (Minute to Week)
- minute to day (Minute to Day)
- minute to hour (Minute to Hour)
- minute to second (Minute to Second)
- minute to millisecond (Minute to Millisecond)
- second to year (Second to Year)
- second to month (Second to Month)
- second to week (Second to Week)
- second to day (Second to Day)
- second to hour (Second to Hour)
- second to minute (Second to Minute)
- second to millisecond (Second to Millisecond)
- millisecond to year (Millisecond to Year)
- millisecond to month (Millisecond to Month)
- millisecond to week (Millisecond to Week)
- millisecond to day (Millisecond to Day)
- millisecond to hour (Millisecond to Hour)
- millisecond to minute (Millisecond to Minute)
- millisecond to second (Millisecond to Second)
Common questions (FAQ)
10 quick answers with guides and links to the matching converter.
- How many seconds are in a minute?
- How many minutes are in an hour?
- How many hours are in a day?
- How many days are in a week?
- How many milliseconds are in a second?
- How many days are in a year (for conversion)?
- How many days are in a month (for conversion)?
- How many seconds are in an hour?
- How many minutes are in a day?
- How many hours are in a week?
Time Converter Guide
Quick start
- Enter a value and pick source and target units. The result updates as you type.
- Use swap to reverse units and copy to copy the result. The All Unit Conversions panel lists your value across every supported time unit.
Formulas & deeper content
Need formulas, worked examples, and tables for one pair (e.g. hours to days)? Use a dedicated converter from the list below.
Short answers to common questions are in the FAQ section above. Year is modeled as 365 days and month as 30 days for fixed conversion factors.
Example uses
- Scheduling: project durations in days or weeks.
- Media: lengths in hours, minutes, and seconds.
- Science and engineering: seconds and milliseconds.