# Inches to Meters Converter URL: https://speedycalculator.com/calculators/conversion/inch-to-meter/ Last updated: 2026-10-25 > Convert inches (in) to metres (m): 1 inch = 0.0254 m, so multiply by 0.0254 or divide by 39.370079. Both fields are editable, so you can also type in metres and get inches back. ## Inputs - Inches (in) ## Results - Metres ## Formula ``` 1 in = 0.0254 m 1 m = 39.370079 in m = in × 0.0254 ``` ## Explanation One inch is exactly 0.0254 m. Multiply inches by 0.0254, or divide by 39.37, to get metres. ### How to use the Inches to Meters Converter - Type the number of inches into the **Inches** field. Decimals such as 19.685 are fine. - Read the answer in **Metres** – it updates as you type, with no button to press. - To convert the other way, type into **Metres** and the inches are recalculated. - Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion. This page converts only in ⇄ m. Need a different unit? Use the general length converter, where you can choose any “from” and “to” unit. ### How it works Both units measure length, so they are always in the same ratio: one inch equals 0.0254 metres. The calculator multiplies the number of inches you type by 0.0254 to give metres, and when you type into the metres field it divides by the same factor to give inches. Because the ratio never changes, doubling the inches always doubles the metres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation). ### How to convert inches to metres - Write down the value in inches, for example **39.37 in**. - Multiply by the conversion factor 0.0254 (because 1 inch = 0.0254 m). - 39.37 × 0.0254 = **0.999998 m**. - To go back from metres to inches, divide by 0.0254 – or multiply by 39.370079. ### in to m conversion table InchesMetresMetresInches1 in0.0254 m1 m39.370079 in6 in0.1524 m2 m78.740157 in12 in0.3048 m5 m196.85039 in24 in0.6096 m10 m393.70079 in36 in0.9144 m20 m787.40157 in39.37 in0.999998 m50 m1,968.5039 in48 in1.2192 m100 m3,937.0079 in60 in1.524 m1,000 m39,370.079 in72 in1.8288 m100 in2.54 m ### What is an inch? The inch has been defined as exactly 25.4 mm since 1959. It is used in the U.S. for almost everything and worldwide for screen sizes, wheel and tyre sizes, pipe threads and many tools. ### What is a metre? The metre is the SI base unit of length. Since 1983 it has been defined as the distance light travels in a vacuum in 1/299,792,458 of a second, which ties it to a fundamental constant rather than a physical bar of metal. ### Quick mental conversion For a fast estimate, multiply inches by about **0.025** to get metres; the error is about 1.6%. Use the calculator above when you need the exact figure. ### Common mistakes to avoid Mixing the international foot (0.3048 m) with the old u.s. survey foot, confusing nautical and statute miles, and writing decimal feet such as 5.5 ft as “5 ft 5 in” (it is 5 ft 6 in). ## Worked example Inputs — Inches: 39.37 in. Results — **Metres = 0.999998 m**. ## FAQ **How many inches in a metre?** About 39.37 in. **How many metres is 100 inches?** 2.54 m. **How do I convert inches to metres?** Multiply the number of inches by 0.0254. For example, 39.37 in × 0.0254 = 0.999998 m. **How do I convert metres back to inches?** Divide by 0.0254 (or multiply by 39.370079), or simply type the value into the metres field above. **What is 100 in in metres?** 100 in = 2.54 m. **Is this conversion exact?** Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit. **Can I convert to other units on this page?** This page converts only between inches and metres. To pick any length unit, use the general length converter linked under Related calculators. **What formula does the Inches to Meters Converter use?** 1 in = 0.0254 m. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)