Length Converter
Enter a value in millimeters, centimeters, meters, kilometers, inches, feet, yards or miles and see it converted into all seven other units at once.
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
FAQ
Frequently Asked Questions
How do I convert between metric and imperial length units?
1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 yard = 91.44 cm, 1 mile = 1.609 km. For quick estimation: multiply inches by 2.5, multiply miles by 1.6.
What are the metric length prefixes?
Kilo = 1,000, no prefix = 1, centi = 0.01, milli = 0.001, micro = 0.000001. So 1 kilometer = 1,000 meters = 100,000 centimeters = 1,000,000 millimeters.
How precise is the conversion?
Conversion factors are based on official SI units or internationally accepted standards. Precision is at least four decimal places — sufficient for everyday, professional and academic use.
Guide
What is the Length Converter?
The length converter converts between all common length units: metre, kilometre, centimetre, millimetre, inch, foot, yard, mile and nautical mile.
How does the Length Converter work?
Enter the value and source unit. The calculator converts to all available units. Conversion is done via the metre as the reference unit.
Key Data and Facts
1 inch = 2.54 cm. 1 foot = 30.48 cm. 1 mile = 1.609 km. 1 nautical mile = 1.852 km. 1 yard = 91.44 cm.
Step-by-Step Guide
How to use the length converter step by step: 1. Choose the source unit – metre, kilometre, centimetre, millimetre, inch, foot, yard, mile or nautical mile. 2. Enter the value – the calculator instantly converts it into all available units. 3. The conversion is performed using the metre as a reference: all units are first converted into metres and then into the target unit. 4. Important conversion factors: 1 inch = 2.54 cm (exact), 1 foot = 12 inches = 30.48 cm, 1 yard = 3 feet = 91.44 cm, 1 mile = 1,609.344 m. 5. The nautical mile in comparison: 1 nautical mile = 1,852 m (defined as 1 arcminute at the equator). 6. Common applications: convert body height from feet/inches to cm (5 feet 10 inches = 177.8 cm), convert distances abroad from miles to kilometres. Tip: for a quick mile-to-km estimate, multiply the value by 1.6.
Calculation Example
5 feet 10 inches in cm: (5 * 30.48) + (10 * 2.54) = 152.4 + 25.4 = 177.8 cm. 100 miles = 100 * 1.609 = 160.9 km.
Sources
Official sources
Calculations are based on applicable German laws and official data:
Full methodology at Methodology.
Reviewed by Konstantin Iakovlev · Last updated:
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