Free Time Converter
The Time Converter switches between milliseconds, seconds, minutes, hours, days, weeks, months, and years. Enter a duration and every unit updates instantly.
Working with timestamps instead? The Unix to Date and Date to Unix converters handle epoch values, and the Timezone Converter shifts between zones.
How to use the Time Converter
- 1 Enter the duration in any unit — seconds, minutes, hours, days, weeks, months or years.
- 2 Pick the unit you entered.
- 3 See the duration expressed in every other unit.
- 4 Swap to convert in the opposite direction.
How to Use
Enter a duration, choose the source and target units, and the converted value appears live. The table shows the duration in all supported units.
- Milliseconds through years
- Live result as you type
- Full conversion table
Frequently asked questions
Why are months and years ambiguous?
Because they vary in length. A month is 28 to 31 days and a year is 365 or 366, so any single figure is an average. This converter uses the conventional averages of 30.44 days per month and 365.25 days per year; if you need an exact date, use the date difference calculator instead.
Why is a day not exactly 86,400 seconds?
It usually is, but not always. Earth rotation is not perfectly steady, so leap seconds are occasionally inserted to keep civil time aligned with the sky. Unix time ignores them, which is why it is only an approximation of elapsed physical time over long spans.
How many seconds are in a year?
About 31,557,600 for a 365.25-day average year, or 31,536,000 for a plain 365-day year. The difference matters in finance and science, where "per year" usually means the average including leap years.
Related Unit & Data Converters
You might also need
Tools from other categories that people pair with the Time Converter: