Years to Days Converter
Enter a value to instantly convert between time units.
1 Year (avg) = 365.2425 Day
Key Formulas
Hour → Minute
min = h × 60Minute → Hour
h = min × 0.0166667Day → Hour
h = d × 24Hour → Day
d = h × 0.0416667Formula
d = yr × 365.2425This converter uses the Gregorian calendar's average year: 365.2425 days, from the rule of a leap day every 4 years except centurial years not divisible by 400 (97 leap days per 400-year cycle). That's why the factor isn't a clean 365.25 — the century exception shaves it down slightly. Useful for age, lifespan, and long-term project-length calculations where you need the long-run average rather than a specific calendar year's day count.
Source: ISO 80000-3:2019
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
One year. 1 year = 365.2425 days on the Gregorian long-run average.
1 yr = 365.2425 d
One decade. 10 years = 3,652.425 days. Long-term project or lifespan tracking.
10 yr = 3652.425 d
One generation. 30 years = 10,957.275 days. Career or generational span.
30 yr = 10957.275 d
One century. 100 years = 36,524.25 days on the Gregorian average (not 36,525; the century leap-year exception drops 3 leap days every 400 years, or 0.75 day per century on average).
100 yr = 36524.25 d