Years to Days Converter

How to convert years to days

1 year = 365 days. To convert years to days, multiply by 365. A common calendar year is 365 days (a leap year has 366; the average Julian year is 365.25). A day is 24 hours, 86,400 seconds.

Worked examples

• 2 years = 730 days (2 × 365)
• 10 years = 3,650 days (10 × 365)
• 50 years = 18,250 days (50 × 365)

Where this conversion comes up

Years are used for ages, contracts and interest periods; days for deadlines, trips, leave and age calculations. For ages in days and long countdowns. This page uses 365-day years; add one day per leap year for exact calendar spans (10 years is 3,652 or 3,653 days).

Quick estimate

Multiply by 365, or by 1,000 and divide by 2.74.

Common mistakes

• Dividing instead of multiplying. A day is smaller than a year, so the number of days must come out larger: 2 years = 730 days.
• Ignoring leap years. This page uses 365-day years. For an exact calendar span between two dates, count the leap days (one every four years) or use 365.25 days per year.
• Reading the remainder as a decimal. 1 h 30 min is 1.5 h, not 1.3 h: divide the leftover minutes by 60 (or seconds by 60) to get the decimal part.

Going the other way? Use the days to years converter. Related time converters: minutes to hours, hours to minutes, seconds to minutes, minutes to seconds, seconds to hours, hours to seconds.