## Conversion formula

The conversion factor from days to years is 0.0027397260273973, which means that 1 day is equal to 0.0027397260273973 years:

1 d = 0.0027397260273973 yr

To convert 366 days into years we have to multiply 366 by the conversion factor in order to get the time amount from days to years. We can also form a simple proportion to calculate the result:

1 d → 0.0027397260273973 yr

366 d → T(yr)

Solve the above proportion to obtain the time T in years:

T(yr) = 366 d × 0.0027397260273973 yr

T(yr) = 1.0027397260274 yr

The final result is:

366 d → 1.0027397260274 yr

We conclude that 366 days is equivalent to 1.0027397260274 years:

366 days = 1.0027397260274 years

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 year is equal to 0.99726775956284 × 366 days.

Another way is saying that 366 days is equal to 1 ÷ 0.99726775956284 years.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred sixty-six days is approximately one point zero zero three years:

366 d ≅ 1.003 yr

An alternative is also that one year is approximately zero point nine nine seven times three hundred sixty-six days.

## Conversion table

### days to years chart

For quick reference purposes, below is the conversion table you can use to convert from days to years

days (d) years (yr)
367 days 1.005 years
368 days 1.008 years
369 days 1.011 years
370 days 1.014 years
371 days 1.016 years
372 days 1.019 years
373 days 1.022 years
374 days 1.025 years
375 days 1.027 years
376 days 1.03 years