Inches to Meters Converter

About the in to m calculation

One inch is exactly 0.0254 meters, 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. The SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.

Formula

m = in × 0.0254

1 in = 0.0254 m
1 m = 39.3701 in

Worked example

To convert 12 in, multiply by 0.0254: 12 × 0.0254 = 0.3048 m.

Frequently asked questions

How many meters are in a inch?

There are 0.0254 meters in one inch. To convert any amount, multiply the number of inches by 0.0254.

How do I convert meters back to inches?

Divide instead of multiplying, or equivalently multiply by 39.3701. One meter is 39.3701 inches.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between inches and meters 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. Meters: the SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.

Sources

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