21 minutes in days

Conversion

21 minutes is equivalent to 0.0145833333333333 days.^[1]

Conversion formula
How to convert 21 minutes to days?

We know (by definition) that: $1 \min \approx 0.00069444444 d$

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

\frac{1 \min}{21 \min} \approx \frac{0.00069444444 d}{x d}

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

x d \approx \frac{21 \min}{1 \min} * 0.00069444444 d \to x d \approx 0.01458333324 d

Conclusion: $21 \min \approx 0.01458333324 d$

21 minutes is equivalent to 0.0145833333333333 days

Conversion in the opposite direction

The inverse of the conversion factor is that 1 day is equal to 68.5714285714286 times 21 minutes.

It can also be expressed as: 21 minutes is equal to $\frac{1}{68.5714285714286}$ days.

Approximation

An approximate numerical result would be: twenty-one minutes is about zero point zero one days, or alternatively, a day is about sixty-eight point five six times twenty-one minutes.

Units involved

This is how the units in this conversion are defined:

Minutes

"The minute is a unit of time or of angle. As a unit of time, the minute is equal to 1⁄60 (the first sexagesimal fraction) of an hour, or 60 seconds. In the UTC time standard, a minute on rare occasions has 61 seconds, a consequence of leap seconds (there is a provision to insert a negative leap second, which would result in a 59-second minute, but this has never happened in more than 40 years under this system). As a unit of angle, the minute of arc is equal to 1⁄60 of a degree, or 60 seconds (of arc). Although not an SI unit for either time or angle, the minute is accepted for use with SI units for both. The SI symbols for minute or minutes are min for time measurement."

Wikipedia page of minutes

Days

"A day is a unit of time. In common usage, it is either an interval equal to 24 hours or daytime, the consecutive period of time during which the Sun is above the horizon. The period of time during which the Earth completes one rotation with respect to the Sun is called a solar day. Several definitions of this universal human concept are used according to context, need and convenience. In 1960, the second was redefined in terms of the orbital motion of the Earth, and was designated the SI base unit of time. The unit of measurement day, redefined in 1960 as 86 400 SI seconds and symbolized d, is not an SI unit, but is accepted for use with SI. A civil day is usually 86 400 seconds, plus or minus a possible leap second in Coordinated Universal Time (UTC), and occasionally plus or minus an hour in those locations that change from or to daylight saving time."

Wikipedia page of days

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.

Conversion

Conversion formula How to convert 21 minutes to days?

Conversion in the opposite direction

Approximation

Conversion formula
How to convert 21 minutes to days?