What is the length converter?
The length converter is a collection of calculators for changing one length unit into another. Convert metric, imperial, and US customary length units for height, distance, construction, and everyday measurements.
Length conversions are useful for height, construction dimensions, screen sizes, product measurements, travel distances, and everyday comparisons between metric and imperial units.
Available length units
This category includes the following units:
- Centimeter (cm)
- Inch (in)
- Meter (m)
- Foot (ft)
- Kilometer (km)
- Mile (mi)
- Millimeter (mm)
- Yard (yd)
Common length use cases
Use this category when the same measurement appears in different unit systems, data sheets, calculators, reports, or regional conventions.
- Length conversions help compare measurements across specifications, calculators, labels, and technical references.
- Use this category when source data and target documents use different length units.
- The dedicated conversion pages show formulas, examples, tables, related pages, and FAQ for individual unit pairs.
Popular length units explained
These short unit notes help readers choose the right starting unit before opening a specific conversion page.
Centimeter (cm)
A centimeter is a metric length unit equal to one hundredth of a meter. It is often used for height, small product dimensions, fabric measurements, and school or lab measurements.
Browse cm conversionsInch (in)
An inch is a US customary and imperial length unit. It is commonly used for screens, tools, furniture, clothing sizes, and many everyday measurements in the United States.
Browse inches conversionsMeter (m)
A meter is the base metric unit of length. It is used for room dimensions, height, construction, engineering, athletics, and scientific measurements.
Browse meters conversionsFoot (ft)
A foot is a US customary and imperial length unit equal to 12 inches. It is widely used for height, building dimensions, aviation altitude, and real estate measurements.
Browse feet conversionsKilometer (km)
A kilometer is a metric distance unit equal to 1,000 meters. It is used for road distances, races, maps, and geographic measurements.
Browse km conversionsMile (mi)
A mile is a US customary and imperial distance unit. It is commonly used for road distances, running events, and speed measurements such as miles per hour.
Browse miles conversionsCommon length conversion mistakes
Most wrong answers come from mixing unit systems, rounding too early, or choosing a unit that looks similar but means something different.
- Do not confuse decimal inches with fractional inches or feet-and-inches notation.
- Do not mix millimeters, centimeters, and meters without checking the scale difference.
- Do not round source dimensions before converting values used for fit, clearance, machining, or product specifications.
Popular length conversion pages
Start with one of these common length conversions:
Browse length conversions by starting unit
Use these grouped links when you know the unit you are starting from and want to compare several destination units.
Centimeter conversions
Start with centimeters and convert to common length units.
Inch conversions
Start with inches and convert to common length units.
Meter conversions
Start with meters and convert to common length units.
Foot conversions
Start with feet and convert to common length units.
Kilometer conversions
Start with kilometers and convert to common length units.
Mile conversions
Start with miles and convert to common length units.
Millimeter conversions
Start with millimeters and convert to common length units.
Yard conversions
Start with yards and convert to common length units.
All length conversion pages
This complete index helps users and search engines discover every generated length conversion page.
Related categories and references
Use these links to move between neighboring converter categories, hand-written unit references, popular units, and complete site indexes.
Unit Wiki and references
Popular length units
Complete indexes and tools
How length conversion works
Most pages in this category use a conversion factor between two units. The calculator applies that factor automatically and shows the result instantly.
How to use this converter
Enter a value, choose the units, and read the converted result immediately. Each dedicated conversion page also includes a formula, examples, a conversion table, related links, and FAQ.
FAQ
Which length units are included?
This category includes centimeters, inches, meters, feet, kilometers, miles, millimeters, yards and related units.
Are formulas included?
Yes. Individual conversion pages include formulas, manual steps, examples, and conversion tables.