Time Duration Calculator — Convert Between Time Units
Convert any time duration between seconds, minutes, hours, days, weeks, months, and years. See also Time Calculator and Hours Calculator.
How the Time Duration Calculator Works
This calculator converts a time duration from one unit to all other common time units. It first converts the input value to seconds (the base unit), then divides by the appropriate factor for each target unit. For months and years, average values are used based on the Gregorian calendar (365.2425 days per year, 30.436875 days per month).
Time Unit Conversion Formulas
1 minute = 60 seconds
1 hour = 60 minutes = 3,600 seconds
1 day = 24 hours = 1,440 minutes = 86,400 seconds
1 week = 7 days = 168 hours = 604,800 seconds
1 month (avg) = 30.4369 days = 2,629,746 seconds
1 year (avg) = 365.2425 days = 31,556,952 seconds
Common Duration Conversions Reference
| Duration | Hours | Minutes | Seconds |
|---|---|---|---|
| 1 Day | 24 | 1,440 | 86,400 |
| 1 Week | 168 | 10,080 | 604,800 |
| 1 Month (30d) | 720 | 43,200 | 2,592,000 |
| 1 Quarter (91d) | 2,184 | 131,040 | 7,862,400 |
| 1 Year (365d) | 8,760 | 525,600 | 31,536,000 |
| 1 Decade | 87,600 | 5,256,000 | 315,360,000 |
Frequently Asked Questions
How do I convert hours to minutes?
Multiply the number of hours by 60. For example, 3.5 hours = 3.5 x 60 = 210 minutes. Enter the value and select "Hours" to see all conversions instantly.
Why are months and years approximate?
Months vary from 28 to 31 days, and years can be 365 or 366 days. The calculator uses the Gregorian average: 30.4369 days per month and 365.2425 days per year. For exact date-based calculations, use the Date Calculator.
How do I convert decimal hours to hours and minutes?
The whole number is hours. Multiply the decimal part by 60 to get minutes. For example, 2.75 hours = 2 hours and (0.75 x 60) = 45 minutes, so 2 hours 45 minutes.
What is the difference between this and the Time Calculator?
The Time Duration Calculator converts a single duration value between units. The Time Calculator performs arithmetic (addition/subtraction) on clock times and finds differences between two specific times.
Can I enter decimal values?
Yes. You can enter any positive decimal number. For example, 1.5 days, 0.25 hours, or 2.333 weeks. The calculator handles fractional values precisely.