Years to Days Converter

Convert between years and days for age calculations, project planning, and time duration measurements

Years (yr)

1 year ≈ 365.25 days (average)

Days

1 day = 0.00274 years (average)

Enter a value to see the conversion result

Time Conversion Reference

Years	⇔	Days
0.25 years	⇔	91.3 days
0.5 years	⇔	182.6 days
1 year	⇔	365.25 days
2 years	⇔	730.5 days
5 years	⇔	1,826.25 days
10 years	⇔	3,652.5 days

Calendar and Life Events

Age Milestones:
• 18 years = 6,574 days (legal adult)
• 21 years = 7,670 days (drinking age US)
• 65 years = 23,741 days (retirement)
• 100 years = 36,525 days (centenarian)

Educational Periods:
• Elementary: 6 years (2,192 days)
• High school: 4 years (1,461 days)
• Bachelor's degree: 4 years
• PhD program: 4-7 years

Calendar Facts:
• Regular year: 365 days
• Leap year: 366 days
• Average year: 365.25 days
• Leap year cycle: every 4 years

Time Units

Year: 365.25 days (average)
Day: 24 hours
Leap year: 366 days
Regular year: 365 days

Usage Tips

Accounts for leap years
Uses average year length
Good for planning estimates
Useful for age calculations

Applications

Planning: Project timelines
Finance: Investment periods
Health: Age calculations
Education: Program duration