# 31 inches in centimeters

## Conversion

31 inches is equivalent to 78.74 centimeters.^{[1]}

## Conversion formula

How to convert 31 inches to centimeters?

We know (by definition) that: $1\mathrm{in}=2.54\mathrm{cm}$

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

$\frac{1\mathrm{in}}{31\mathrm{in}}=\frac{2.54\mathrm{cm}}{x\mathrm{cm}}$Now, we cross multiply to solve for our unknown $x$:

$x\mathrm{cm}=\frac{31\mathrm{in}}{1\mathrm{in}}*2.54\mathrm{cm}\to x\mathrm{cm}=78.74\mathrm{cm}$Conclusion: $31\mathrm{in}=78.74\mathrm{cm}$

## Conversion in the opposite direction

The inverse of the conversion factor is that **1 centimeter is equal to 0.0127000254000508 times 31 inches**.

It can also be expressed as: 31 inches is equal to $\frac{1}{\mathrm{0.0127000254000508}}$ centimeters.

## Approximation

An approximate numerical result would be: **thirty-one inches is about zero centimeters**, or alternatively, *a centimeter is about zero point zero one times thirty-one inches*.

## 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.