Quick answer
Enter a duration and choose units. Remember: 1 hour = 3,600 seconds, 1 day = 1,440 minutes, 1 week = 168 hours and 1 year (365 days) = 8,760 hours.
- 1 minute:
- 60 seconds
- 1 hour:
- 3,600 seconds
- 1 day:
- 86,400 seconds
- 1 week:
- 168 hours
- Average month:
- 30.44 days
- 1 year:
- 365 days (8,760 h)
Video lengths, project estimates, cooking times and timesheets all need quick time maths. Our time converter turns any duration into the unit you need.
How to use Time Converter – step by step
- 1 Enter a durationDecimals work, e.g. 1.5 hours.
- 2 Choose unitsFor example hours → minutes.
- 3 See every unitThe full breakdown appears below.
Why use our Time Converter?
From ms to decades
Covers tiny and huge spans.
Average month
Uses 30.44 days (one-twelfth of a Gregorian year).
Clear results
Large numbers are formatted with separators.
Instant
Results as you type.
Time conversion charts
Hour to Minute
| Hour (h) | Minute (min) |
|---|---|
| 1 h | 60 min |
| 5 h | 300 min |
| 10 h | 600 min |
| 25 h | 1,500 min |
| 50 h | 3,000 min |
| 100 h | 6,000 min |
Day to Hour
| Day (d) | Hour (h) |
|---|---|
| 1 d | 24 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 25 d | 600 h |
| 50 d | 1,200 h |
| 100 d | 2,400 h |
Months and years
Calendar months vary from 28 to 31 days, so converting to months always uses an average. For exact differences between two dates, use our upcoming Date Difference Calculator.
Frequently asked questions
How many seconds are in a day?
86,400 seconds.
How many hours are in a year?
8,760 hours in a 365-day year, or 8,784 in a leap year.
How many minutes are in 2.5 hours?
150 minutes.
How long is an average month?
About 30.44 days.
Last updated November 2026 · Written and tested by the SmallEasyTools team.