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Project durations in days, video lengths in seconds, subscription terms in months — time units come up in nearly every planning conversation, and converting between them by hand is easy to get slightly wrong, especially with months and years.
This tool converts between eight common time units — from milliseconds up to years — using average month and year lengths for the longer units.
How it works
Enter a value, choose the unit you're converting from and the unit you want to convert to. The tool handles any combination of the eight supported units.
- Enter value.
- Enter from.
- Enter to.
- Click Calculate to see your results.
Examples
Converting hours to minutes
2.5 hours converts to 150 minutes — useful for scheduling and time-tracking.
Who should use it
- Converting a duration between hours, minutes and seconds for scheduling.
- Estimating how many days or weeks a given number of hours represents.
Industry applications
- Project management and scheduling
- Media and video production
Advantages
- Supports the full common range from milliseconds to years.
- Uses accurate averages for variable-length units like months.
Limitations
- Month and year conversions are averages, not exact for a specific calendar period.
Common mistakes to avoid
- Expecting month/year conversions to be exact for a specific calendar month, when they use an average length instead.
Best practices
- For exact calendar-date calculations (like "3 months from March 15"), use a date calculator instead of an average-based duration converter.
Tips
- For exact calendar-based durations rather than averages, use a dedicated date calculator instead.