Convert Days to Years

Enter the time in days below to get the value converted to years.

Results in Years:
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1 day = 0.002738 yr
Do you want to convert years to days?

How to Convert Days to Years

Calendars document the days in a month

To convert a day measurement to a year measurement, multiply the time by the conversion ratio. One day is equal to 0.002738 years, so use this simple formula to convert:

years = days × 0.002738

The time in years is equal to the days multiplied by 0.002738.

For example, here's how to convert 5 days to years using the formula above.
5 day = (5 × 0.002738) = 0.01369 yr

Days and years are both units used to measure time. Keep reading to learn more about each unit of measure.


One day is the time it takes for the Earth to complete a single rotation around its axis in relation to the Sun. There are 24 hours in a day.

The day is an SI accepted unit for time for use with the metric system. Days can be abbreviated as day, for example 1 day can be written as 1 day.


One year is the time it takes for the Earth to complete its orbit around the Sun. There are 365 days in a year, with the exception of the leap year when there are 366.

Years can be abbreviated as yr, and are also sometimes abbreviated as y. For example, 1 year can be written as 1 yr or 1 y.

Day Measurements and Equivalent Year Conversions

Common day values converted to the equivalent year value
Days Years
1 day 0.002738 yr
2 day 0.005476 yr
3 day 0.008214 yr
4 day 0.010952 yr
5 day 0.01369 yr
6 day 0.016427 yr
7 day 0.019165 yr
8 day 0.021903 yr
9 day 0.024641 yr
10 day 0.027379 yr
11 day 0.030117 yr
12 day 0.032855 yr
13 day 0.035593 yr
14 day 0.038331 yr
15 day 0.041069 yr
16 day 0.043807 yr
17 day 0.046544 yr
18 day 0.049282 yr
19 day 0.05202 yr
20 day 0.054758 yr
21 day 0.057496 yr
22 day 0.060234 yr
23 day 0.062972 yr
24 day 0.06571 yr
25 day 0.068448 yr
26 day 0.071186 yr
27 day 0.073923 yr
28 day 0.076661 yr
29 day 0.079399 yr
30 day 0.082137 yr
31 day 0.084875 yr
32 day 0.087613 yr
33 day 0.090351 yr
34 day 0.093089 yr
35 day 0.095827 yr
36 day 0.098565 yr
37 day 0.101303 yr
38 day 0.10404 yr
39 day 0.106778 yr
40 day 0.109516 yr

More Day Time Conversions

Convert to Centuries
1 day is equal to 2.7379E-5 centuries
Convert to Decades
1 day is equal to 0.000274 decades
Convert to Months
1 day is equal to 0.032855 months
Convert to Weeks
1 day is equal to 0.142857 weeks
Convert to Hours
1 day is equal to 24 hours
Convert to Minutes
1 day is equal to 1,440 minutes
Convert to Seconds
1 day is equal to 86,400 seconds
Convert to Milliseconds
1 day is equal to 86,400,000 milliseconds
Convert to Microseconds
1 day is equal to 86,400,000,000 microseconds
Convert to Nanoseconds
1 day is equal to 86,400,000,000,000 nanoseconds

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.