Time Unit Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years.
How to Use the Time Unit Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months (30 days) and years (365 days).
- Select the "From" unit — choose the time unit you want to convert from.
- Enter a value — type any number into the input field. Results update in real time.
- Select the "To" unit — choose the target time unit.
- Swap if needed — click the swap button to reverse the conversion direction.
- Copy the result — click Copy to send the value to your clipboard.
Months are approximated as 30 days and years as 365 days for consistent conversion.
Frequently Asked Questions
How many seconds are in a day?
1 day = 24 hours × 60 minutes × 60 seconds = 86,400 seconds.
How many milliseconds in a second?
There are 1,000 milliseconds in 1 second. Milliseconds are commonly used in programming for timing, animations and API response measurements.
Why are months defined as 30 days?
Calendar months vary from 28 to 31 days. For consistent conversion, this tool uses the common approximation of 30 days per month. For precise date calculations involving specific months, use a date calculator instead.
How many hours are in a week?
1 week = 7 days × 24 hours = 168 hours.
How many seconds in a year?
1 year (365 days) = 365 × 86,400 = 31,536,000 seconds. A leap year (366 days) has 31,622,400 seconds. This tool uses the standard 365-day year.
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