Time conversion is the friendliest of the unit families — everything scales off 60 and 24 — so it's easy to do in your head most of the time. A converter helps with the oddball steps like weeks to hours or months to minutes.
The base of seconds
All time units anchor to the second. Minutes (60 s), hours (3,600 s) and days (86,400 s) are exact multiples, so conversions between them are clean integer math once you know the factors.
Months and years are averages
Months and years aren't fixed — a month is 28 to 31 days and a year is 365 or 366. Converting those requires an average (30.44 and 365.25 days). For an exact span between two dates, calendar arithmetic — like the date difference calculator — is the right tool.
Frequently asked questions
3,600 — 60 seconds per minute × 60 minutes per hour.
Divide the number of hours by 24. For example, 48 hours is 2 days.
This converter uses an average month of 30.44 days and year of 365.25 days. For precise calendar spans, use the date difference calculator.