Conversion formula

The conversion factor from days to weeks is 0.14285714285714, which means that 1 day is equal to 0.14285714285714 weeks:

1 d = 0.14285714285714 wk

To convert 28 days into weeks we have to multiply 28 by the conversion factor in order to get the time amount from days to weeks. We can also form a simple proportion to calculate the result:

1 d → 0.14285714285714 wk

28 d → T_(wk)

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

T_(wk) = 28 d × 0.14285714285714 wk

T_(wk) = 4 wk

The final result is:

28 d → 4 wk

We conclude that 28 days is equivalent to 4 weeks:

28 days = 4 weeks

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 week is equal to 0.25 × 28 days.

Another way is saying that 28 days is equal to 1 ÷ 0.25 weeks.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-eight days is approximately four weeks:

28 d ≅ 4 wk

An alternative is also that one week is approximately zero point two five times twenty-eight days.

Conversion table

days to weeks chart

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