## 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 9 days into weeks we have to multiply 9 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

9 d → T(wk)

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

T(wk) = 9 d × 0.14285714285714 wk

T(wk) = 1.2857142857143 wk

The final result is:

9 d → 1.2857142857143 wk

We conclude that 9 days is equivalent to 1.2857142857143 weeks:

9 days = 1.2857142857143 weeks

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 week is equal to 0.77777777777778 × 9 days.

Another way is saying that 9 days is equal to 1 ÷ 0.77777777777778 weeks.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that nine days is approximately one point two eight six weeks:

9 d ≅ 1.286 wk

An alternative is also that one week is approximately zero point seven seven eight times nine 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

days (d) weeks (wk)
10 days 1.429 weeks
11 days 1.571 weeks
12 days 1.714 weeks
13 days 1.857 weeks
14 days 2 weeks
15 days 2.143 weeks
16 days 2.286 weeks
17 days 2.429 weeks
18 days 2.571 weeks
19 days 2.714 weeks