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Unit Converter

Conversion formula

The conversion factor from millimeters to inches is 0.039370078740157, which means that 1 millimeter is equal to 0.039370078740157 inches:

1 mm = 0.039370078740157 in

To convert 4.2 millimeters into inches we have to multiply 4.2 by the conversion factor in order to get the length amount from millimeters to inches. We can also form a simple proportion to calculate the result:

1 mm → 0.039370078740157 in

4.2 mm → L(in)

Solve the above proportion to obtain the length L in inches:

L(in) = 4.2 mm × 0.039370078740157 in

L(in) = 0.16535433070866 in

The final result is:

4.2 mm → 0.16535433070866 in

We conclude that 4.2 millimeters is equivalent to 0.16535433070866 inches:

4.2 millimeters = 0.16535433070866 inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 6.047619047619 × 4.2 millimeters.

Another way is saying that 4.2 millimeters is equal to 1 ÷ 6.047619047619 inches.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four point two millimeters is approximately zero point one six five inches:

4.2 mm ≅ 0.165 in

An alternative is also that one inch is approximately six point zero four eight times four point two millimeters.

Conversion table

millimeters to inches chart

For quick reference purposes, below is the conversion table you can use to convert from millimeters to inches

millimeters (mm) inches (in)
5.2 millimeters 0.205 inches
6.2 millimeters 0.244 inches
7.2 millimeters 0.283 inches
8.2 millimeters 0.323 inches
9.2 millimeters 0.362 inches
10.2 millimeters 0.402 inches
11.2 millimeters 0.441 inches
12.2 millimeters 0.48 inches
13.2 millimeters 0.52 inches
14.2 millimeters 0.559 inches