How to use the Time Converter
- Enter the amount of time.
- Choose the unit you are converting from and the unit you want.
- Read the converted value and the conversion rate.
- For exact dates, use the days between dates calculator instead.
Formula used
Result = Value × (seconds per source unit ÷ seconds per target unit). A month is 30.4375 days (365.25 ÷ 12) and a year is 365.25 days on average.
Worked example
Here is the Time Converter worked through with the example values shown above, so you can check each step by hand.
| Inputs | |
|---|---|
| Value | 90 |
| From | Minutes |
| To | Hours |
| Result | |
| Converted value | 1.5 |
| Conversion rate | 1 min = 0.016666667 h |
Quick reference table
Common values converted with the units selected above.
| From | To |
|---|---|
| 1 min | 0.016666667 h |
| 10 min | 0.16666667 h |
| 30 min | 0.5 h |
| 60 min | 1 h |
| 90 min | 1.5 h |
| 1,000 min | 16.666667 h |
The basic relationships
There are 60 seconds in a minute, 60 minutes in an hour and 24 hours in a day. So a day has 24 hours, 1,440 minutes and 86,400 seconds. A week has 168 hours.
Ninety minutes is 1.5 hours, and a 2.5-hour film is 150 minutes. A million seconds is about 11.6 days, and a billion seconds is about 31.7 years.
Why months and years are averages
Calendar months have 28 to 31 days and years have 365 or 366. For conversions the calculator uses the average Gregorian year of 365.25 days, so a year is 365.25 days or 8,766 hours, and a month is one twelfth of that, 30.4375 days.
For the exact number of days between two dates, or to add days to a date, use the days between dates and add days calculators on this site, which count the actual calendar.
Useful figures
A year has about 52.18 weeks. A working year of 2,080 hours is about 86.7 full days. Eight hours of sleep a night is 2,922 hours a year, which is about 33.3% of the time.
Milliseconds matter in computing and sport: 1,000 milliseconds make a second, and a blink takes roughly 100 to 400 milliseconds.
Working out how long something takes
The converter helps with time estimates, such as turning 3,600 seconds into an hour, or a 14-hour flight into minutes for a schedule. To convert hours and minutes to decimal hours for payroll, use the hours calculator on this site.
If you need to measure the time between two clock times, the hours calculator also handles breaks and shifts that cross midnight.
Decimal hours versus hours and minutes
A common mistake is to read decimal hours as hours and minutes. 1.5 hours is 1 hour 30 minutes, not 1 hour 50 minutes, because a decimal fraction of an hour is a fraction of 60 minutes. 0.1 hours is 6 minutes, 0.25 is 15, 0.5 is 30 and 0.75 is 45. So 2.75 hours is 2 hours 45 minutes.
To convert in the other direction, divide the minutes by 60: 20 minutes is 0.33 hours and 50 minutes is 0.83 hours. When you add times, convert everything to the smallest unit first (for example minutes), add, then convert back, to avoid mistakes such as treating 1:45 plus 1:30 as 2:75.
Frequently asked questions
How many minutes are in a day?
There are 1,440 minutes in a day, which is 24 hours times 60 minutes.
How many seconds are in a year?
About 31,557,600 seconds in an average year of 365.25 days, or 31,536,000 in a common 365-day year.
Why are months and years averages?
Calendar months and years vary in length. For exact spans between dates, use the days between dates calculator.
How many weeks are in a year?
About 52.18 weeks, since a year is 365.25 days and a week is 7 days.
How do I convert minutes to decimal hours?
Divide the minutes by 60. 45 minutes is 0.75 hours.
How many hours are in a week?
There are 168 hours in a week.
Is 1.5 hours the same as 1 hour 50 minutes?
No. 1.5 hours is 1 hour 30 minutes, because 0.5 hours is half of 60 minutes.
This calculator gives estimates for information only. Actual figures from a bank, employer, tax authority or doctor may differ. It is not financial, tax, legal or medical advice.