## Conversion formula

The conversion factor from days to hours is 24, which means that 1 day is equal to 24 hours:

1 d = 24 hr

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

1 d → 24 hr

28 d → T(hr)

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

T(hr) = 28 d × 24 hr

T(hr) = 672 hr

The final result is:

28 d → 672 hr

We conclude that 28 days is equivalent to 672 hours:

28 days = 672 hours

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 hour is equal to 0.0014880952380952 × 28 days.

Another way is saying that 28 days is equal to 1 ÷ 0.0014880952380952 hours.

## 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 six hundred seventy-two hours:

28 d ≅ 672 hr

An alternative is also that one hour is approximately zero point zero zero one times twenty-eight days.

## Conversion table

### days to hours chart

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

days (d) hours (hr)
29 days 696 hours
30 days 720 hours
31 days 744 hours
32 days 768 hours
33 days 792 hours
34 days 816 hours
35 days 840 hours
36 days 864 hours
37 days 888 hours
38 days 912 hours