1000 millimeters in inches

Conversion formula
How to convert 1000 millimeters to inches?

We know (by definition) that: $1\mathrm{mm}\approx 0.039370079\mathrm{in}$

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

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

Conclusion: 1000 ⁢ mm ≈ 39.370079000000004 ⁢ in

Conversion in the opposite direction

The inverse of the conversion factor is that 1 inch is equal to 0.0254 times 1000 millimeters.

It can also be expressed as: 1000 millimeters is equal to $\frac{1}{\mathrm{0.0254}}$ inches.

Approximation

An approximate numerical result would be: one thousand millimeters is about thirty-nine point three six inches, or alternatively, a inch is about zero point zero three times one thousand millimeters.