Length Converter

Convert between different units of length and distance

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✨ Length Converter

Convert between different units of length and distance. No data leaves your browser – every conversion happens locally.

Common length conversions

1 inch

= 2.54 cm

1 foot

= 30.48 cm

1 meter

= 3.281 feet

1 km

= 0.621 miles

1 mile

= 1.609 km

5 ft 10 in

= 177.8 cm

100 cm

= 3 ft 3.4 in

1 yard

= 91.44 cm

Things that trip people up

Height in feet + inches. Most converters take decimal feet, not feet + inches. 5 ft 9 in = 5.75 feet (9 ÷ 12 = 0.75). Or just enter 69 inches directly.

Running distances. A 5K is 3.107 miles. A 10K is 6.214 miles. A marathon (42.195 km) is 26.219 miles.

Frequently asked questions

30.48 cm exactly. One foot = 12 inches, and 1 inch = 2.54 cm, so 12 × 2.54 = 30.48.

Divide cm by 30.48 to get decimal feet. Multiply the decimal part by 12 for inches. 175 cm ÷ 30.48 = 5.741 ft → 5 ft and 0.741 × 12 = 8.9 in → 5 ft 9 in.

25.4 mm exactly — this is the defined conversion, not a rounded approximation.

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