Converting time units
Time conversions run through the second as a base. Fixed units are exact — a minute is 60 seconds, an hour 3,600, a day 86,400. Months and years are averaged (a year as 365.25 days, a month as one twelfth of that), because calendar months vary in length.
Exact vs. average units
Seconds through weeks convert exactly. Months and years are approximate by nature: use them for rough planning, not legal or billing precision where the actual calendar matters. The tool notes this by using average lengths.
Everyday uses
Handy for turning a deadline in days into hours, a video length in seconds into minutes, or a subscription in months into weeks. Pick the two units and read the answer without juggling 60s and 24s.
Frequently asked questions
How many seconds in a day?
Exactly 86,400 seconds — 24 hours times 3,600 seconds per hour.
Are months exact here?
No. A month is treated as an average (about 30.44 days) because calendar months differ. Use it for estimates.
How many seconds are in an hour?
3,600 (60 × 60). A full day has 86,400 seconds.
How many minutes are in a week?
10,080 minutes (7 × 24 × 60).
How many hours are in a year?
A 365-day year has 8,760 hours.