21 minutes in hours


Conversion

21 minutes is equivalent to 0.35 hours.[1]


Conversion formula
How to convert 21 minutes to hours?

We know (by definition) that: 1min 0.016666667hr

We can set up a proportion to solve for the number of hours.

1 min 21 min 0.016666667 hr x hr

Now, we cross multiply to solve for our unknown x:

x hr 21 min 1 min * 0.016666667 hr x hr 0.350000007 hr

Conclusion: 21 min 0.350000007 hr


21 minutes is equivalent to 0.35 hours

Conversion in the opposite direction

The inverse of the conversion factor is that 1 hour is equal to 2.85714285714286 times 21 minutes.

It can also be expressed as: 21 minutes is equal to 1 2.85714285714286 hours.


Approximation

An approximate numerical result would be: twenty-one minutes is about zero hours, or alternatively, a hour is about two point eight five times twenty-one minutes.



Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.

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