Time Duration Converter

Convert between seconds, minutes, hours, days, weeks, months, and years for any time duration.

Time Duration Converter tool

Loading...

Example

Input: 1 year to hours (hr)

Result: 8766 hr

The converter uses an average year of 365.25 days, so 365.25 x 24 = 8,766 hours (a 365-day calendar year is 8,760 hours).

Common Time Conversions

DurationEquals
1 hour3,600 seconds
1 day1,440 minutes
1 day86,400 seconds
1 week168 hours
1 week10,080 minutes
1 month (average)30.4375 days
1 month (average)730.5 hours
1 year (average)52.178571 weeks
1 year (average)8,766 hours
1 year (average)31,557,600 seconds
10,000 minutes6.944444 days
1 million seconds11.574074 days
1 billion seconds31.688088 years

Months and years use the converter averages (30.4375 and 365.25 days). Rounded to 6 decimal places.

  1. Choose the time unit you are converting from (seconds, minutes, hours, days, weeks, months, or years).
  2. Enter the duration value you want to convert.
  3. See the equivalent duration in the other six time units calculated and displayed instantly.
  4. Note that month and year conversions use standard averages (30.4375 days/month, 365.25 days/year).
  5. Copy any result to your clipboard for use in project planning, scheduling, or calculations.

Seconds to Years: How Time Units Add Up

One day is 86,400 seconds, one week is 10,080 minutes, and an average year is 8,766 hours. This converter changes any length of time between seconds, minutes, hours, days, weeks, months and years. Type a number and it lists every other unit at once.

Seconds, minutes, hours, days and weeks convert exactly. Months and years do not, because their length changes. So the tool uses averages. A month is 30.4375 days and a year is 365.25 days, which spreads the leap day over four years. That is why 1 year shows as 8,766 hours rather than the 8,760 hours of a 365-day year.

These averages suit estimates and long spans. For real calendar dates, such as the days between two birthdays, use the Date Difference Calculator. It counts the actual months and leap years.

The converter is handy for questions that are awkward to do in your head. How many days is 10,000 minutes? About 6.94. How long is a million seconds? About 11.6 days, while a billion seconds is nearly 31.7 years. How many hours is a six-week project run around the clock? Exactly 1,008.

One pitfall: results are decimal, not clock time. If you see 2.75 hours, that means 2 hours 45 minutes, not 2 hours 75 minutes. To split a decimal, multiply the part after the point by 60.

Formula / How It Works

1 day = 24 hours = 1,440 minutes = 86,400 seconds | 1 week = 7 days | 1 month = 30.4375 days | 1 year = 365.25 days

Sources

Frequently Asked Questions

There are exactly 86,400 seconds in a day. That comes from 24 hours x 60 minutes x 60 seconds. A week is 604,800 seconds. Very rarely, a leap second is added to a day to keep clocks in step with the Earth, but normal time math ignores it.
A 365-day year has 8,760 hours, and a 366-day leap year has 8,784. This converter uses an average year of 365.25 days, which gives 8,766 hours. The average is the right choice for long spans, where leap years even out. For one specific year, use the calendar figure.
A 365-day year is 52 weeks and 1 day, and a leap year is 52 weeks and 2 days. Using the average year of 365.25 days, the converter shows 52.178571 weeks. That is why the same date moves forward one weekday each year, or two after a leap day.
A month is taken as 30.4375 days, which is 365.25 days divided by 12. That equals 730.5 hours. Real months run from 28 to 31 days, so month results are averages. To count the days between two real dates, use a date difference tool instead.
Keep the whole hours and multiply the decimal part by 60. So 2.75 hours is 2 hours and 0.75 x 60 = 45 minutes. A common payroll slip is reading 1.5 hours as 1 hour 50 minutes, when it is 1 hour 30 minutes. You can also convert 2.75 hours to 165 minutes here.

Related Tools

Date Difference Calculator

Find the exact number of days, weeks, months, and years between any two dates. Fast and accurate.

Date and Time

Age Calculator

Calculate your exact age in years, months, and days from your date of birth. Find age at any past or future date.

Date and Time

Speed Converter

Convert between mph, km/h, m/s, knots, and ft/s speed units with instant accurate results.

Unit Converters

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and dates back to Unix timestamps instantly.

Developer Tools

Working Days Calculator

Count working days between two dates, excluding weekends and, if you like, the public holidays of your country.

Date and Time