Length Converter – Free Online Unit Converter
Convert between metres, feet, inches, miles, kilometres, centimetres, yards, nautical miles, light years and more. Instant, accurate and 100% private.
| Unit | Symbol | Converted Value |
|---|
Live Conversion
Values update instantly as you type — in either the From or To field. Bidirectional, no button needed.
All Units at Once
The table below the converter shows your value in every unit simultaneously. Click any to copy.
Swap Units
Click ⇄ to instantly reverse the direction of conversion — From becomes To and vice versa.
100% Private
All conversion runs in JavaScript in your browser. No data is sent to any server.
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📖 How to Use the Length Converter
Enter a Value
Type the number you want to convert in either field. Conversion runs live as you type — no button press needed.
Select Your Units
Use the dropdowns to choose From and To units. Tap a Quick Pair button for the most common conversions.
See All Units at Once
Scroll to the All Units table to see your value converted into every available unit simultaneously.
Copy the Result
Click Copy next to the result, or click any value in the All Units table to copy it to your clipboard.
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❓ Frequently Asked Questions
💡 Why Use Our Length Converter?
Both-Way Live
Edit either field for instant conversion in both directions — no separate reverse tool needed.
All Units Table
See every unit at once — scan and copy any value without repeating the conversion.
One-Click Swap
Reverse From/To with one click — saves time when converting back and forth.
Quick Pairs
Common conversion pairs as one-click shortcuts below the main converter.
Zero-Upload Privacy
Runs entirely in your browser — nothing sent to any server.
Free, No Account
All units, unlimited use — completely free. No sign-up, no watermarks.
📚 Reference — Length Conversion Factors
Common Conversions
Popular queries: metres to feet km to miles cm to inches length converter
| From | To | Factor | Note |
|---|---|---|---|
| 1 metre | 3.28084 feet | × 3.28084 | Exact: 1 m = 3.28084 ft |
| 1 kilometre | 0.621371 miles | × 0.621371 | 1 km = 1000 m |
| 1 mile | 1.609344 km | × 1.609344 | Exact definition |
| 1 foot | 30.48 cm | × 30.48 | Exact definition |
| 1 inch | 2.54 cm | × 2.54 | Exact definition |
| 1 yard | 0.9144 m | × 0.9144 | 3 feet = 1 yard |
| 1 nautical mile | 1.852 km | × 1.852 | Used in aviation/maritime |