How to use the time converter
- 1 Type the value you want to convert.
- 2 Choose the unit to convert from and the unit to convert to.
- 3 Press ⇄ to swap the two units.
- 4 Read the result, and see the same duration in every other unit in the table below.
Durations versus dates
This converter is for lengths of time. For the time between two calendar dates, use the Date Difference Calculator, which counts real months and leap years; for someone's age, use the Age Calculator.
- Decimal hours on timesheets: 7.25 hours is 7 hours 15 minutes.
- Months and years here are averages, so use them for estimates.
- For speed and distance problems, convert times to hours first.
Features
Nine time units
From milliseconds to decades.
Calendar averages
A year of 365.2425 days and a month of 30.44 days, the Gregorian averages.
All units at once
See seconds, hours, days and weeks together.
When to use it
Work and billing
Convert minutes worked into hours for invoices: 450 minutes is 7.5 hours.
Projects and deadlines
Turn 90 days into about 12.9 weeks or 2.96 months. For exact days between two dates, use the Date Difference Calculator.
Video and audio
Convert seconds to minutes and hours for video lengths; 5,400 seconds is 1.5 hours.
Study and fitness
Total up minutes of study or exercise into hours a week or a year.
Related Unit tasks
Frequently asked questions
How many seconds are in a day?
86,400 seconds: 24 hours × 60 minutes × 60 seconds.
How many hours are in a year?
8,766 hours using the average year of 365.2425 days, or 8,760 hours in a normal year of 365 days.
How many minutes are in a week?
10,080 minutes.
How long is a month in days?
Months have 28 to 31 days. This converter uses the average of 30.44 days; use the Date Difference Calculator for exact calendar months.
How do I convert minutes to hours?
Divide by 60. 135 minutes is 2.25 hours, or 2 hours 15 minutes.
How do I convert decimal hours to hours and minutes?
Multiply the decimal part by 60. 3.4 hours is 3 hours and 24 minutes.
How many weeks are in a year?
52.18 weeks on average, which is 52 weeks and one or two days.
How many milliseconds in a second?
1,000 milliseconds.
Why is the average year 365.2425 days?
The Gregorian calendar adds a leap day every four years except century years not divisible by 400, which averages to 365.2425 days.
Can I convert time zones here?
No. This tool converts durations. Time zone changes depend on the place and daylight saving rules.
Why do some months have more days?
The calendar inherited its uneven months from the Roman calendar. February is shorter, and leap years add a day to keep the calendar in step with the seasons.
Can I add up hours and minutes with this tool?
It converts a single duration between units. To add several times together, convert each to minutes, add them, and convert the total back to hours.
How do I convert a time to decimal hours for a timesheet?
Divide the minutes by sixty and add them to the hours. Seven hours and forty-five minutes becomes seven point seven five hours, which is what most payroll systems expect.
How many minutes are in a year?
About five hundred and twenty-five thousand nine hundred and fifty minutes using the average year, or five hundred and twenty-five thousand six hundred in a normal year of three hundred and sixty-five days.
Is the converter useful for overtime?
Yes. Convert extra minutes worked each day into hours, then add them up for the week or month to check overtime pay against your payslip.
Built and reviewed by Hamza Farooq, founder and lead developer
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