3 inches in millimeters

Result

The conversion result is: 3 inches is equivalent to 76.2 millimeters.[1]

Conversion formula
How to convert 3 inches to millimeters?

We know (by definition) that: 1 in = 25.4 mm.

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

1 in / 3 in = 25.4 mm / x mm

Now, we cross multiply to solve for our unknown x:

x mm = (3 in / 1 in) * 25.4 mm → x mm = 76.19999999999999 mm

Conclusion:

3 in = 76.19999999999999 mm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 millimeter is equal to 0.0131233595800525 times 3 inches.

It can also be expressed as: 3 inches is equal to 1 / 0.0131233595800525 millimeters.

Approximation

An approximate numerical result would be: three inches is about zero millimeters, or alternatively, a millimeter is about zero point zero one times three 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.