Length Converter โ 12 Units, Metric & Imperial
Convert between 12 length units โ metric (km, m, cm, mm, ฮผm, nm), imperial (mi, yd, ft, in), nautical miles, and light years. Get your result instantly and see all units compared at a glance.
1 m in all units
12 Units
Metric, imperial, nautical miles, and even light years.
Instant
Results update in real time as you type.
Private
All calculations happen locally in your browser.
Included Length Converter Tools
Single Unit Converter
Pick any two of 12 length units โ from nanometers to light years โ and get the exact conversion instantly with a swap button.
All-Units Comparison Table
See your value converted to all 12 units simultaneously so you can compare metric, imperial, nautical, and astronomical scales side by side.
How to Convert Length Units
Enter a value
Type the length you want to convert into the input field.
Choose units
Select your source unit from the From dropdown and your target unit from the To dropdown.
Read the result
The converted value appears instantly. Click it to copy to clipboard.
See all units
Scroll to the All Conversions table to see your value expressed in every supported unit at once.
Frequently Asked Questions
- How many length units does this converter support?
- ToolMint's Length Converter supports 12 units: Kilometer, Meter, Centimeter, Millimeter, Micrometer, Nanometer, Mile, Yard, Foot, Inch, Nautical Mile, and Light Year.
- How do I convert kilometers to miles?
- Select Kilometer in the From dropdown, enter your value, and select Mile in the To dropdown. The result appears instantly. 1 kilometer = 0.621371 miles.
- What is a nautical mile?
- A nautical mile equals exactly 1,852 meters (1.852 km). It is used in marine navigation and aviation and is based on the circumference of the Earth.
- How far is a light year in kilometers?
- One light year is approximately 9.461 ร 10ยนยฒ kilometers (about 9.46 trillion km) โ the distance light travels in one year through a vacuum.
- Can I convert between metric and imperial in one step?
- Yes. Choose a metric unit (km, m, cm) in From and an imperial unit (mi, yd, ft, in) in To โ or vice versa. The converter handles the full cross-system math directly.