Instant · Precise · Universal
28 units available
6 categories total
To convert years to days: multiply by 365 (or 365.25 for average including leap years). To seconds: multiply by 31,536,000.
1 yr = 365 d = 8,760 h = 525,600 min = 31,536,000 s. A leap year has 366 days (31,622,400 s).
For example, 1 Year (365 days) (yr) = 0.9972677596 Year (Leap) (yr (Leap)).
| Year (365 days) (yr) | Year (Leap) (yr (Leap)) |
|---|---|
| 0.1 | 0.09972677596 |
| 0.5 | 0.4986338798 |
| 1 | 0.9972677596 |
| 2 | 1.994535519 |
| 5 | 4.986338798 |
| 10 | 9.972677596 |
| 25 | 24.93169399 |
| 50 | 49.86338798 |
| 100 | 99.72677596 |
| 500 | 498.6338798 |
| 1000 | 997.2677596 |
The common year is a unit of time equal to 365 days, or 31,536,000 seconds.
1 yr = 365 d = 8,760 h = 525,600 min = 31,536,000 s. A leap year has 366 days (31,622,400 s).
To convert years to days: multiply by 365 (or 365.25 for average including leap years). To seconds: multiply by 31,536,000.
Age calculation, financial year reporting, contract durations, academic years, and historical timeline reference.
The year 2000 was a leap year (divisible by 400), but 1900 was not (divisible by 100 but not 400). The Gregorian rule fixes the calendar's drift to 1 day per 3,236 years.
Assuming every 4th year is a leap year — century years must be divisible by 400 (so 1900 wasn't a leap year).
Leap year rule: divisible by 4 = leap, UNLESS divisible by 100, UNLESS also divisible by 400. So 2000 was, 1900 wasn't.
A leap year is a calendar year containing 366 days (31,622,400 seconds), with an extra day added as February 29th to correct calendar drift.
1 leap year = 366 d = 8,784 h = 527,040 min = 31,622,400 s. That's 86,400 s more than a common year.
To convert leap years to days: multiply by 366. To seconds: multiply by 31,622,400.
Calendar systems, date arithmetic in software (handling Feb 29), birthday celebrations for 'leaplings,' and financial calculations.
People born on February 29 are called 'leaplings' — they technically have a birthday only once every 4 years. The odds of being born on Feb 29 are about 1 in 1,461.
The most common bug: not handling Feb 29. Many software failures have occurred on leap day. Also, the 100/400 rule is often forgotten.
Leap year test: divisible by 4? Yes → leap year, UNLESS divisible by 100, UNLESS also divisible by 400. Code it: (y%4==0 && y%100!=0) || y%400==0.



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