Convert any time period to days with precision and ease
Quick access to commonly used time period conversions. Click any period for instant results.
From academic planning to business strategy, our calculator serves diverse time conversion needs.
Essential time periods for workplace planning, HR management, and business operations.
Need to calculate days to a specific date instead? Try our Date Calculator
Comprehensive coverage of time units from weeks to centuries, with precise calculations for each.
1/86400 of a day
86400 seconds = 1 day
1/1440 of a day
1440 minutes = 1 day
1/24 of a day
24 hours = 1 day
7-day periods
4 weeks = 28 days
14-day periods (2 weeks)
1 fortnight = 14 days
Average 30.44 days per month
6 months ≈ 183 days
3-month periods (business quarters)
1 quarter ≈ 91 days
365.25 days (includes leap years)
1 year ≈ 365 days
10-year periods
1 decade ≈ 3,653 days
100-year periods
1 century ≈ 36,525 days
Convert any time period to days in three simple steps. Fast, accurate, and reliable.
Input any number from $1 to $10,000 for your time calculation
Choose from 10 time units: seconds, minutes, hours, weeks, months, quarters, years, and more
View precise day count with detailed breakdowns and share options
Common questions about time period calculations and how our calculator works.
We use average values: 30.44 days per month and 365.25 days per year. This accounts for leap years and varying month lengths to provide accurate long-term calculations.
You can convert seconds, minutes, hours, weeks, fortnights, months, quarters, years, decades, and centuries. Enter any whole number amount between 1 and 10,000 and select your desired time unit.
Yes! Our calculations use 365.25 days per year, which automatically accounts for leap years in the long-term average.
Absolutely! The calculator handles everything from seconds to multiple centuries, making it perfect for both precise short-term calculations and historical or geological time scales.
Very accurate for planning purposes. We use internationally recognized averages that account for calendar variations over time.
Explore our complete suite of date and time calculation tools for all your planning needs.
Calculate exact days between today and any future or past date
Time Perspective
1 year ≈ 365 days, 1 decade ≈ 3,653 days, 1 century ≈ 36,525 days
Leap Years
Our calculations automatically include leap years for accurate long-term planning
Share Results
Every calculation gets a unique URL you can bookmark and share
1 second = 1/86400 days
1 minute = 1/1440 days
1 hour = 1/24 days
1 week = 7 days
1 fortnight = 14 days
1 month ≈ 30.44 days
1 quarter ≈ 91.31 days
1 year ≈ 365.25 days
1 decade ≈ 3,653 days
1 century ≈ 36,525 days
