Inches to Miles Converter

About the in to mi calculation

One inch is exactly 0.00001578 miles, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Still standard for screen sizes, pipe diameters and tyre rims worldwide. Road distances in the US and UK. Defined as exactly 1,609.344 metres since 1959.

Formula

mi = in × 0.00001578

1 in = 0.00001578 mi
1 mi = 63,360 in

Worked example

To convert 12 in, multiply by 0.00001578: 12 × 0.00001578 = 0.00018939 mi.

Frequently asked questions

How many miles are in a inch?

There are 0.00001578 miles in one inch. To convert any amount, multiply the number of inches by 0.00001578.

How do I convert miles back to inches?

Divide instead of multiplying, or equivalently multiply by 63,360. One mile is 63,360 inches.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between inches and miles is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Inches: still standard for screen sizes, pipe diameters and tyre rims worldwide. Miles: road distances in the US and UK. Defined as exactly 1,609.344 metres since 1959.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units