Time Calculator
Convert a time value between seconds, minutes, hours, days, weeks, average months and average years. Enter one number, pick its unit and read all seven results at once.
How to use the Time Calculator
- Enter your numbers in the Time Calculator above.
- Press the Convert button to see the result.
- To try other numbers, change any value and press the button again.
The time conversion
Seconds = value × seconds in its unit · · · Result = seconds ÷ seconds in the target unit
The calculator turns your value into seconds, then divides by the length of each unit: 60 seconds for a minute, 3,600 for an hour, 86,400 for a day and 604,800 for a week. An average month is 2,629,746 seconds, or 30.436875 days. An average year is 31,556,952 seconds, or 365.2425 days, the mean length of a year in the Gregorian calendar. Results show up to 6 decimal places. A result too small for that shows in scientific notation, so 1 second is 3.169 × 10^-8 average years. The value has to be 0 or more.
Worked example
Enter 1.5 and pick Hours. The calculator returns 5,400 seconds, 90 minutes, 1.5 hours, 0.0625 days, 0.008929 weeks, 0.002053 average months and 0.000171 average years.
Frequently asked questions
How long is a month in this calculator?
An average month of 30.436875 days, which is one twelfth of a 365.2425-day year. Real months run from 28 to 31 days, so treat the month and year rows as averages. For the days between two calendar dates, use the day counter.
How many seconds are in a day?
86,400, which is 24 hours × 60 minutes × 60 seconds. Enter 1 and pick Days to see it beside the other units: 1,440 minutes, 24 hours and 0.142857 weeks.
Where can I add or subtract two times?
In the time duration calculator. It takes two times in hours, minutes and seconds and adds them or subtracts the second from the first. This page converts a single value between units.