Length Converter
Convert meters, feet, miles, kilometers, inches, yards and more.
- Instant
- 100% free
- Mobile ready
- No signup
Nanometer (nm)
Micrometer (µm)
| Unit | 1 nm equals |
|---|---|
| Nanometer (nm) | 1 |
| Micrometer (µm) | 0.001 |
| Millimeter (mm) | 0.000001 |
| Centimeter (cm) | 1e-7 |
| Meter (m) | 1e-9 |
| Kilometer (km) | 1e-12 |
| Inch (in) | 3.93701e-8 |
| Foot (ft) | 3.28084e-9 |
| Yard (yd) | 1.09361e-9 |
| Mile (mi) | 6.21371e-13 |
| Nautical Mile (nmi) | 5.39957e-13 |
How it works
- 1 meter = 3.28084 feet
- 1 mile = 1.609344 kilometers
- 1 inch = 2.54 centimeters
Popular length conversions
Jump straight to the conversion you need.
Frequently asked
How many feet are in a meter?
1 meter equals exactly 3.28084 feet.
How do I convert miles to kilometers?
Multiply miles by 1.609344 to get kilometers.
Where you'll actually use this
Length measurements describe how far apart two points are along a straight line. The metric system uses the meter as its base unit, while imperial systems rely on inches, feet, yards, and miles.
- Construction & DIY
Floor plans, lumber lengths, drywall sheets, and fixture clearances all swap between metric and imperial depending on supplier and region.
- Travel & navigation
Convert driving distances from kilometers to miles when crossing borders or comparing routes on different map services.
- Sports & fitness
Running splits, swim distances, and track events bounce between meters, yards, and miles depending on the event format.
- International shopping
TV diagonals, monitor sizes, fabric, and shoe measurements are quoted in inches, cm, or mm by region.
Common mistakes to avoid
- Mixing up cm and m
100 cm equals 1 m. A common error is reading 1.5 m as 15 cm — always check the decimal place.
- Foot vs feet symbol
Single quote (′) means feet, double (″) means inches. 5′10″ is five feet ten inches, not feet-and-feet.
- Statute vs nautical miles
A nautical mile (1,852 m) is about 15% longer than a statute mile (1,609 m). Used for sea and air navigation.
Did you know?
Since 2019 the meter is defined by the speed of light — exactly 1/299,792,458 of a second of travel.
The Roman mile was 1,000 paces (mille passus). The English mile was later standardized to 8 furlongs of 660 feet each.
History & context
The metric system was adopted by France in 1795 and now serves as the legal measurement system in nearly every country. The US, Liberia, and Myanmar remain the only nations still officially using imperial units for daily measurement.
What people do next
Curated handoffs from this tool — picked, not guessed.
Frequently used together
Tools real users open in the same session.
Guides for length
Get the best new converters & calculators.
Hand-picked tools, useful conversion tips, no spam — unsubscribe in one click.
People also use
Handpicked tools related to length.
Accuracy & sources
How this tool is built and verified.
- Source
- Published formula
- Last reviewed
- Q2 2026
- Status
- Verified
- International System of Units (SI)BIPM — Bureau International des Poids et Mesures · The International System of Units (SI Brochure), 9th edition
- Weights and Measures Act 1985United Kingdom
- Standards aligned
- Formula verified
- Editor reviewed
Explore the topic
Knowledge graphYour next conversion is one tap away.
Trending tools, your recent picks, and smart suggestions — curated, not cluttered.