4 millimeters in inches
Result
The conversion result is: 4 millimeters is equivalent to 0.15748031496063 inches.[1]
Conversion formula
How to convert 4 millimeters to inches?
We know (by definition) that: 1 mm ≈ 0.039370079 in.
We can set up a proportion to solve for the number of inches.
1 mm / 4 mm ≈ 0.039370079 in / x in
Now, we cross multiply to solve for our unknown x:
x in ≈ (4 mm / 1 mm) * 0.039370079 in → x in ≈ 0.157480316 in
Conclusion:
4 mm ≈ 0.157480316 in
Conversion in the opposite direction
The inverse of the conversion factor is that 1 inch is equal to 6.35 times 4 millimeters.
It can also be expressed as: 4 millimeters is equal to 1 / 6.35 inches.
Approximation
An approximate numerical result would be: four millimeters is about zero point one six inches, or alternatively, a inch is about zero times four millimeters.
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.