Years to Days Converter

The formula is: days = years × 365.25 (the average Julian year).

Worked example: 3 years is 1,095.75 days.

To go the other way, use the Days to Years Converter, which divides by 365.25 instead of multiplying.

A common year has 365 days and a leap year has 366, with the extra day added as February 29. Leap years happen every 4 years, except century years that are not divisible by 400, so 2000 was a leap year but 1900 was not.

Averaged over the full 400 year Gregorian cycle, a year is 365.2425 days. This calculator uses 365.25 days (the Julian year, one leap day every 4 years), a common standard for converting years to days that differs from the Gregorian average by less than one day per century. The Julian year of exactly 365.25 days is also the standard year unit in astronomy.

Days in Specific Years

Common values in years and their equivalents in days:

Converting years to days is popular for age milestones (turning 10,000 days old happens at about 27.4 years), loan and contract terms, historical durations, and science questions. For an exact count between two real dates, the Date Difference Calculator checks each actual leap year and is more precise than an average.

To measure the real time between two dates in years, months and days, use the Time Between Dates Calculator. To check whether a year has a leap day, use the Leap Year Calculator.

Every time converter that shares a unit with this page, starting with the reverse conversion, one page per pair of units, then the converters that show many units at once.

• Days to Years Converter: 1 year is 365.25 days on average
• Days to Months Converter: 1 month is 30.4375 days on average
• Days to Weeks Converter: 1 week = 7 days
• Hours to Days Converter: 1 day = 24 hours
• Hours to Years Converter: 1 year is 8,766 hours on average
• Days to Minutes Converter: 1 day = 1,440 minutes
• Minutes to Years Converter: 1 year is 525,960 minutes on average
• Months to Years Converter: 1 year = 12 months
• Seconds to Days Converter: 1 day = 86,400 seconds
• Seconds to Years Converter: 1 year is 31,557,600 seconds on average
• Weeks to Years Converter: 1 year is about 52.178571 weeks on average
• Decades to Years Converter: 1 decade = 10 years
• Day Converter: days to hours, minutes, weeks, fortnights, months and years at once
• Hour Converter: hours to minutes, seconds, days, weeks, months and years at once
• Minute Converter: minutes to hours, seconds, days, weeks and more at once
• Seconds Converter: seconds to milliseconds, nanoseconds, minutes, hours and more at once
• Milliseconds Converter: milliseconds to seconds, minutes, microseconds and more at once
• Time Unit Converter: any amount of time in 13 units, from picoseconds to decades