Certified tool
Time Unit Converter
Convert seconds, minutes, hours, days, and weeks as duration units. Not a calendar-date calculator.
Exact defined conversion
3600.000000 s
1 h → Second
Uses exact defined factors relative to the family base unit.
Assumptions
- The base unit is the SI second.
- A day is exactly 86400 seconds. A week is exactly 7 such days.
- Month and year are omitted because they are calendar-variable.
- This page does not accept calendar dates.
Examples
- 1 hour = 3600 seconds.
- 1 day = 24 hours = 86400 seconds.
- 1 week = 168 hours.
How to use
- Enter a non-negative duration.
- Choose seconds through weeks.
- Use DateToolMage if you need days between two calendar dates, age, or business days.
Limitations
- A civil calendar day can be 23 or 25 hours across DST. This tool does not model that.
- Unix timestamps belong to DevToolMage.
FAQ
- Can I add a week to 14 March?
- No. That is calendar arithmetic on DateToolMage. This tool only scales duration units.
- Why is there no month option?
- Months are 28–31 days. Treating “month” as 30 days would be fake precision.