Length Converter
Convert between meters, feet, kilometers, miles, inches and more.
Unit
Length Converter
Generated on April 24, 2026
?What is the Length Converter?
A length converter bridges the metric world (meters, kilometers, centimeters) with the imperial and US customary world (feet, inches, yards, miles). It's essential for travellers reading foreign road signs, students solving physics problems, construction workers reading mixed-unit drawings, athletes comparing race distances, and anyone buying furniture or electronics that ship with specs in the 'wrong' system. This tool supports seven common units, handles decimals and negative numbers, and is accurate to many significant digits for engineering use.
The Formula
The meter is the SI base unit of length, defined since 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second. Every unit in this converter is stored with its exact or internationally agreed factor to meters. We convert by first normalizing your input to meters, then dividing by the target unit's factor. This two-step 'pivot through SI' approach is how scientific software and pocket calculators alike keep precision high across very different unit scales.
Practical Examples
A 10 km race is approximately 6.21 miles — useful context when training with a US-sourced plan written in miles.
A height of 6 ft 0 in equals 183 cm, the conversion most often required on international visa and passport forms.
A 100-yard American football field is 91.44 meters long — slightly shorter than a 100 m track sprint.
A 55-inch television has a diagonal of 139.7 cm, letting you verify it fits the TV stand you already own.
Marathon distance 42.195 km equals 26.219 miles — the reason the race finishes 385 yards past 26 miles.
A 3 mm screw becomes 0.118 inches, helpful when buying hardware from a US-market e-commerce site.