# 90 seconds in hours

## Conversion

90 seconds is equivalent to 0.025 hours.^{[1]}

## Conversion formula

How to convert 90 seconds to hours?

We know (by definition) that: $1\mathrm{sec}\approx 0.00027777778\mathrm{hr}$

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

$\frac{1\mathrm{sec}}{90\mathrm{sec}}\approx \frac{0.00027777778\mathrm{hr}}{x\mathrm{hr}}$Now, we cross multiply to solve for our unknown $x$:

$x\mathrm{hr}\approx \frac{90\mathrm{sec}}{1\mathrm{sec}}*0.00027777778\mathrm{hr}\to x\mathrm{hr}\approx 0.0250000002\mathrm{hr}$Conclusion: $90\mathrm{sec}\approx 0.0250000002\mathrm{hr}$

## Conversion in the opposite direction

The inverse of the conversion factor is that **1 hour is equal to 40 times 90 seconds**.

It can also be expressed as: 90 seconds is equal to $\frac{1}{\mathrm{40}}$ hours.

## Approximation

An approximate numerical result would be: **ninety seconds is about zero point zero three hours**, or alternatively, *a hour is about zero times ninety seconds*.

## 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.