Time Converter
Convert time durations across common metric and calendar units.
Converter guide
About Time Unit Converter
The time converter expresses a duration in units such as milliseconds, seconds, minutes, hours, and days. It is meant for elapsed duration conversion, which differs from converting a clock time between time zones or deciding how a calendar month should be counted.
How to use this converter
- 1Enter the duration as a number in the source unit.
- 2Choose the starting unit and the unit you want. Use a duration rather than a time of day such as 3:30 PM.
- 3Read the converted amount and retain enough digits for your use, especially when a long duration is expressed in a very small unit.
Conversion method and technical details
The tool converts through fixed duration factors: a minute is 60 seconds, an hour is 3,600 seconds, and a day is 86,400 seconds. Calendar months and years are not fixed duration units, because their lengths vary with the calendar.
Worked real-world example
Two and a half hours is 150 minutes or 9,000 seconds. The equivalent duration stays the same even if the unit label changes.
Common scenarios and use cases
Convert task durations, machine run times, video lengths, and study or exercise intervals between common units.
For a dependable comparison, confirm both unit labels, keep the original measurement with the converted value, and use the precision required by the task. The converter changes the representation of a value; it does not measure the item or decide which standard your project requires.
Important details and limitations
This is not a time-zone converter and does not adjust for daylight saving time, leap seconds, or variable calendar months. For schedules tied to a date, use a calendar-aware tool and specify the relevant time zone.
Check the output unit as well as the number. If the result will be reused in another calculation, retain full precision where possible and round only at the end. For measurements governed by a technical specification, use the standard and tolerance required by that document.
Frequently asked questions
How many seconds are in an hour?
There are 3,600 seconds in an hour.
Does one month equal 30 days here?
No fixed month conversion is used because calendar months vary in length.
Can I convert 4 PM to another time zone?
No. That is a clock-time and time-zone conversion, not a duration conversion.
Why can the converted number look much larger or smaller?
Different units use different scales. A measurement can have a larger number in a smaller unit and still describe the same quantity. Check the source and target unit labels before comparing values.
How many decimal places should I keep?
Keep enough precision for the job and avoid rounding values between steps. Round the final displayed answer to match the specification, document, or measuring tool you are using.