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 42.9 millimeters into inches we have to multiply 42.9 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

42.9 mm → L_(in)

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

L_(in) = 42.9 mm × 0.039370078740157 in

L_(in) = 1.6889763779528 in

The final result is:

42.9 mm → 1.6889763779528 in

We conclude that 42.9 millimeters is equivalent to 1.6889763779528 inches:

42.9 millimeters = 1.6889763779528 inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 0.59207459207459 × 42.9 millimeters.

Another way is saying that 42.9 millimeters is equal to 1 ÷ 0.59207459207459 inches.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty-two point nine millimeters is approximately one point six eight nine inches:

42.9 mm ≅ 1.689 in

An alternative is also that one inch is approximately zero point five nine two times forty-two point nine 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