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Metric and imperial
Length conversion,
made simple
Convert between metric, imperial and nautical length units, from nanometres to nautical miles. Enter a number and get an accurate result instantly.
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Length converter
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Result
3.28084 ft
1 metre = 3.28084 feet
Feet and inches: 3 ft 3.4 in
1 metre = 3.28084 feet
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Common conversions
Choose a common pairing to load it into the converter.
Simple and accurate
How to use the length converter
Choose your units
Select from metric, imperial and nautical units, including nanometres, micrometres and millimetres.
Read your result
The converted value appears instantly, with a clear formula you can check or copy.
Useful reference
Metric and imperial at a glance
Metric units scale in multiples of ten, while imperial units use several different relationships. The converter handles those calculations for you.
| Unit | Equivalent |
|---|---|
| 1 micrometre | 1,000 nanometres |
| 1 millimetre | 1,000 micrometres |
| 1 centimetre | 10 millimetres |
| 1 metre | 100 centimetres |
| 1 kilometre | 1,000 metres |
| 1 inch | 2.54 centimetres |
| 1 foot | 12 inches |
| 1 mile | 1.609344 kilometres |
| 1 nautical mile | 1.852 kilometres |
Good to know
Frequently asked questions
How accurate are the conversions?
The calculator uses standard exact relationships where they are defined, including 1 inch = 25.4 millimetres and 1 nautical mile = 1.852 kilometres. Results are displayed to six significant figures.
What is the difference between length and distance?
Length usually describes the measurement of an object, while distance describes the space between two points. Both use the same units, so this tool can convert either.
Can I convert decimal values?
Yes. You can enter whole numbers, decimals or negative values. Very small and very large results may be shown in scientific notation for clarity.
Does the converter work on mobile?
Yes. The layout, inputs and controls are designed to work comfortably across phones, tablets and desktop computers.