CM to Inches Converter

Introduction

“My hair feels long. Can you please trim it 3 inches short?” Does this sentence sound familiar to you? If yes, then have you found yourself wondering how many centimetres would be 3 inches? If your answer is again a yes, then you have found yourself in the right place.

Both cm and inches are units of measurement for length. They work with certain values which can be exchanged by following some rules.

Measurement of Length

Measurement is the process of assigning unknown objects known quantities. It is the process to assign numerical values to physical entities or phenomena.

The measurement of any quantity requires one to follow the International System of Units which is more commonly known as the SI system.

The SI system specifies standard units to be used worldwide for different forms of measurements like length, mass, time and temperature. The standard unit for length is metre (m).

Other Units of Length than Metre (m)

Apart from the standard unit of length, i.e. metre (m), length can also be measured in centimetres (cm), millimetres (mm), inches (in), kilometres (km), feet (ft), miles (mi), and yards (yd).

While centimetres, millimetres, metres, inches, and kilometres are the usual units of length, miles, yards, and feet are generally used for military purposes.

These units are related to each other with a certain difference in their values, as given below.

\begin{equation}

\begin{aligned}

& 1 \mathrm{~cm}=10 \mathrm{~mm} \\

& 1 \mathrm{~in}=2.54 \mathrm{~cm} \\

& 1 \mathrm{~m}=100 \mathrm{~cm} \\

& 1 \mathrm{~km}=100 \mathrm{m}

\end{aligned}

\end{equation}

Conversion of Cm to Inches

\begin{equation}

\begin{aligned}

& 1 \text { in }=2.54 \mathrm{~cm} \\

& 2.54 \mathrm{~cm}=1 \text { in } \\

& \text { Thus, } \ 1 \mathrm{~cm}=1 \div 2.54 \mathrm{~in}=0.394 \text { in }

\end{aligned}

\end{equation}

Now, in order to turn any number of centimetres into inches you just need to multiply it by 0.394.

For eg., convert 3 cm into inches.

\\ 1 \text { in }=2.54 \mathrm{~cm} \\\\

2.54 \mathrm{~cm}=1 \ \mathrm{in} \\\\

\text {Thus, } 1 \mathrm{~cm}= \frac{1}{2.54} \mathrm{~in}=0.394 \mathrm{~in} \\\\

3 \mathrm{~cm}=0.394 \times 3=1.182 \text { in }

Conclusion

Before starting with conversion, one must be aware of the SI system of Units. Both centimetres (cm) and inches (in) are units of length that hold a specific value in terms of each other. For eg., 1 in is equivalent to 2.54 cm and 1 cm is equivalent to 0.394 in.

Using this knowledge, one can now easily convert any number of centimetres to their inch equivalent.