Length Converter
Convert metres, feet, miles, inches, km and more.
✓ Professional standard Uses precise SI and internationally agreed conversion factors for accurate, standards-based results.
Length Converter is a free online converter from Toolinza. Convert metres, feet, miles, inches, km and more. It runs entirely in your browser — your data is never uploaded — needs no signup, and works on any device. Toolinza offers 274+ free tools used by people across the UK, USA, Canada, Australia, the EU, India, Pakistan, the Middle East and worldwide.
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About the Length Converter
Length is the conversion people reach for most — following an overseas recipe, reading a product spec, measuring for DIY, or helping with homework. Metres, feet, miles, inches and kilometres all coexist in daily life, and mixing them up leads to wrong-sized purchases and confusion.
This Length Converter switches instantly between metric and imperial units using precise international factors, so your measurements are always exact.
How to use the Length Converter
- Enter the length you want to convert.
- Choose the unit you are converting from.
- Choose the unit you are converting to.
- Read the converted length instantly.
Key features of the Length Converter
- Converts metres, feet, miles, inches, km and more
- Precise international conversion factors
- Converts freely in both directions
- Metric and imperial units
- Private — calculated in your browser
How the Length Converter works
Every conversion uses the exact, internationally agreed factors defined by the International System of Units (SI) and recognised standards bodies. Temperature conversions apply the correct formulas rather than simple multipliers, and results retain full precision so they are suitable for scientific, engineering and everyday use alike.
All conversions are calculated instantly in your browser.
Tips & best practices
- Learn a couple of anchors for quick estimates — one inch is 2.54 cm and one mile is about 1.61 km.
- Keep full precision for technical work, but round sensibly for everyday use.
- Double-check which direction you are converting, as swapping units is the most common slip.
Standards & accuracy
Uses precise SI and internationally agreed conversion factors for accurate, standards-based results.
Results are accurate to standard conversion factors. For everyday use you can round sensibly; for scientific, medical or engineering work, keep the full precision the tool provides.
Who uses the Length Converter?
- DIY and home measurements
- Following international recipes and specs
- Travel and everyday distances
- Study and engineering work
Privacy & security
The Length Converter runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.
Why choose Toolinza?
- 100% free — no hidden charges, watermarks or usage caps.
- Private & secure — your data stays on your device.
- Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
- Works everywhere — desktop, tablet and mobile.
Frequently asked questions
There are exactly 2.54 centimetres in one inch. The converter uses precise factors like this for accurate results.
Yes. You can convert from metric to imperial or the other way, between any supported length units.
Yes. It uses exact international conversion factors, so results are suitable for scientific and engineering use as well as everyday needs.
Yes. The Length Converter is completely free with no signup, no watermarks and no usage limits. Toolinza is supported by unobtrusive advertising so every tool stays free.
Absolutely. This tool runs entirely in your browser — your data and files are never uploaded to any server, so everything stays private on your own device.
No. The Length Converter works instantly in any modern web browser on desktop, tablet and mobile — Windows, macOS, Linux, Android and iOS.