How many centimetres are in an inch?

One inch is exactly 2.54 centimetres, so multiply inches by 2.54 to get centimetres.

How do I convert metres to feet?

Multiply metres by 3.280839895. So 1 metre is about 3.28084 feet.

Length Converter — Free Online Length Converter

How do I convert length between metric and imperial units?

Type a value into AnyTool Length Converter and pick the units. It instantly converts both ways between metres, kilometres, centimetres, millimetres, inches, feet, yards, miles, nautical miles and more, and shows the value in every unit at once in a copyable table. Everything is calculated in your browser, so nothing is uploaded.

Live two-way conversion — type in either field and the other updates
Metric (mm, cm, m, km, µm, nm), imperial (in, ft, yd, mi) and marine/astronomical units
See the value in every unit at once, each row copyable
Exact, internationally-defined factors through a metre base
100% in your browser — no upload, no signup, works offline

What is

Length Conversion

Length conversion changes a distance from one unit to another — for example metres to feet. Because length units are linearly proportional, each one is defined by a single factor relative to a base unit (the metre): one inch is exactly 0.0254 m and one mile is exactly 1609.344 m, so converting is multiplying to metres and dividing into the target unit.

Converters

Related terms

Metres to feetInches to centimetresMiles to kilometresNautical mile

Frequently Asked Questions

One inch is defined as exactly 2.54 centimetres (0.0254 metres). To convert inches to centimetres, multiply by 2.54 — for example 10 inches is 25.4 cm. To go the other way, divide centimetres by 2.54 to get inches.

A foot is exactly 0.3048 metres, so one metre equals 1 ÷ 0.3048 ≈ 3.280839895 feet. To convert metres to feet, multiply by 3.28084; for example 5 metres is about 16.404 feet. To convert feet back to metres, multiply by 0.3048.

A statute (land) mile is exactly 1609.344 metres, while an international nautical mile is exactly 1852 metres — roughly one minute of latitude. The nautical mile is about 15 percent longer and is used for sea and air navigation. AnyTool converts both alongside kilometres, metres, yards and feet.

A statute mile is 1609.344 m; a nautical mile is 1852 m, about 15% longer, used in marine and air navigation.

AnyTool Length Converter computes every result locally in JavaScript using exact conversion factors through a metre base. No value is uploaded, there is no tracking, and the page keeps working offline after the first load.

No. Every calculation runs in your browser, so nothing is sent to a server and it works offline.

Detailed Explanation

Methodology

How the Length Converter Works

AnyTool Length Converter performs every calculation in the browser. Each unit declares a single linear factor relative to a shared metre base — the exact number of metres in one of that unit — so any unit converts to any other through metres without an N-by-N table. The factors are the internationally-agreed definitions: one inch is 0.0254 m, one foot 0.3048 m, one yard 0.9144 m, one mile 1609.344 m, one nautical mile 1852 m, the astronomical unit 149,597,870,700 m and a light-year 9,460,730,472,580,800 m. A value is multiplied to metres and then divided into the target unit.

Sixteen units spanning metric, imperial, marine and astronomical scales
The metre is the shared base; each unit is one exact factor
Conversion is value to base to value, so any unit maps to any other
Editing either field converts both directions live
All arithmetic is client-side JavaScript — no server round-trip

How It Works

All Units, Precision and References

A single input is converted into every unit at once in a copyable table, with the source and target rows highlighted. A decimals control sets precision from 0 to 10 places, and magnitudes that are very large (light-years) or very small (ångströms, nanometres) automatically switch to scientific notation so results stay readable. A common-conversions list and a scale reference table accompany the converter.

Convert-to-all table shows the value in every unit simultaneously
Each unit row is individually copyable
Adjustable precision from 0 to 10 decimal places
Automatic scientific notation for extreme magnitudes
Built-in common conversions and a scale reference table

Privacy & Security

Privacy and Offline Use

Because all conversion runs in the browser, no value is sent to a server, there is no account or tracking, and the page works offline after first load. The converter is built on a shared, unit-tested conversion engine that other AnyTool unit converters reuse, so behaviour is consistent across the site.

Length conversion: in-browser (AnyTool) vs typical online converters
Capability	AnyTool	Typical online converters
Processing	Runs in your browser	Often server-side
Units	16: metric, imperial, marine, astronomical	Often a smaller fixed set
Two-way input	Edit either field, both update	Usually one-direction with a button
All units at once	Yes, copyable table	Often one target at a time
Precision control	Adjustable 0-10 decimals	Frequently fixed
Works offline	Yes (PWA)	No
Cost / signup	Free, no signup	Often ad-heavy or gated

AnyTool converts every unit locally through a metre base and uploads nothing.