Result
0.0000000 km
1 m = 0.001000 km
Converter Guide
Length Converter
From the width of a human hair to the distance between galaxies — length is the most fundamental dimension we measure. Here's everything you need to convert it with confidence.
01 How to Use
- Enter your numeric value in the input field.
- Select your source unit from the left dropdown (e.g., miles).
- Select your target unit from the right dropdown (e.g., kilometers).
- The result updates instantly — no button needed.
- Tap the ⇄ Invert button to flip source and target units.
02 Common Use Cases
Travel
Convert km to miles for US road trips or GPS distances.
Construction
Switch between feet, inches, and meters on blueprints.
Science
Work in nanometers, micrometers, or angstroms precisely.
Fitness
Compare lap lengths in yards vs. meters at different pools.
03 Key Formulas
1 inch = 2.54 cm
1 foot = 30.48 cm
1 mile = 1.60934 km
1 yard = 0.9144 m
1 nautical mile = 1.852 km
1 light-year = 9.461 × 10¹⁵ m
1 foot = 30.48 cm
1 mile = 1.60934 km
1 yard = 0.9144 m
1 nautical mile = 1.852 km
1 light-year = 9.461 × 10¹⁵ m
04 Units Supported
MillimeterCentimeterMeterKilometerInchFootYardMileNautical MileMicrometerNanometerLight-year
05 FAQs
▸ How many centimeters are in an inch?
▸ What's the difference between a nautical mile and a regular mile?
▸ Is a meter the same in every country?