Length Converter

Convert between kilometers, miles, meters, feet, inches, centimeters and more

Enter Length

Value

Unit

All Conversions

Key Formulas

1 km = 0.621371 miles

1 inch = 2.54 cm

1 mile = 5,280 feet = 1,609.344 m

1 yard = 3 feet = 0.9144 m

How Length Conversion Works

Length conversion involves multiplying by a fixed ratio between units. All units relate to the meter as the SI base unit.

Metric System

The metric system uses base-10 prefixes: kilo (1000), centi (1/100), milli (1/1000). This makes conversion straightforward.

Imperial System

The imperial system uses feet, inches, yards, and miles. 12 inches = 1 foot, 3 feet = 1 yard, 5280 feet = 1 mile.

Frequently Asked Questions

How many feet are in a mile?

There are 5,280 feet in one mile, or 1,760 yards.

How many centimeters are in an inch?

There are exactly 2.54 centimeters in one inch.

How do you convert kilometers to miles?

Multiply kilometers by 0.621371 to get miles. For example, 10 km = 6.21371 miles.

What is the difference between metric and imperial?

Metric uses base-10 (meters, cm, km). Imperial uses feet, inches, yards, miles. Most countries use metric; the US primarily uses imperial.

Go deeper

Read the SnoopTool guide behind this tool

The calculator gives you the number. These SnoopTool guides explain the method, the assumptions and the decision — with worked examples, data tables and FAQs.

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Answers, not just a number

Questions this calculator answers, worked out in full — the number first, then the table and the formula behind it.

What is 5 feet 8 inches in cm?172.72 cm — with the full height table from 4′10″ to 6′6″.

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