Time Unit Converter
Enter a value and choose a unit to convert it into seconds, minutes, hours, days, and weeks.
Last updated: September 22, 2026
Frequently asked questions
How many seconds are in a day?
86,400 seconds - 24 hours × 60 minutes × 60 seconds.
Why does this use 365.25 days for a year instead of 365?
365.25 accounts for leap years - a solar year is actually about 365.2422 days, and adding a leap day roughly every 4 years keeps the calendar aligned with Earth's orbit, so 365.25 is a more accurate long-run average than a flat 365.
Should I use this or the Date Duration Calculator to find days between two dates?
Use the Date Duration Calculator for that - it works from actual calendar dates and accounts for real month lengths and leap years exactly. This tool is for converting a plain quantity (like "3.5 hours") between units, not for calendar-date math.
How many minutes are in a week?
10,080 minutes - 7 days × 24 hours × 60 minutes.
Why is a 'month' here an average rather than an exact value?
Calendar months vary from 28 to 31 days, so there's no single fixed length - this converter uses an average of 30.44 days (365.25 days ÷ 12) for the 'months' unit, which is accurate for rough conversions but won't match any specific calendar month exactly.
How many hours are in a year?
About 8,766 hours, using 365.25 days to account for leap years (365.25 × 24 = 8,766) - if you use a flat 365-day year instead, you'd get 8,760 hours, a small but sometimes meaningful difference for long-duration calculations.