This length converter turns any measurement into millimeters, centimeters, meters, kilometers, inches, feet, yards, miles or nautical miles as you type. Choose the unit you have and the unit you need, or open the all-units table to see every conversion side by side.
It uses the exact international definitions, so results match engineering drawings, school textbooks and official documents. Lengths in inches or feet are also shown in feet and inches, which is handy for heights and room sizes.
How to use the Length Converter tool
- Type the number you want to convert in the Value box, for example 1.75 with meters selected.
- Pick the unit you have in From and the unit you need in To.
- Read the result instantly in large type, with the exact formula used shown underneath.
- Open All length units to see the same value in every unit at once, or press ⇄ to swap the direction.
- Use Copy result to paste the converted number into a document, spreadsheet or message.
Why use ToolOrca Length Converter
- Nine metric and imperial length units
- Exact factors: 1 in = 2.54 cm, 1 mi = 1,609.344 m
- Feet-and-inches display for heights
- All-units table updates live
- Swap direction with one click
- Works offline in your browser
How length conversion works
Every length unit is a fixed multiple of the meter. The converter first turns your value into meters and then into the target unit. Because the inch is defined as exactly 2.54 cm, all the imperial units follow from it: a foot is 12 inches (0.3048 m), a yard is 3 feet (0.9144 m) and a mile is 5,280 feet (1,609.344 m).
Worked example: to convert 6 feet to centimeters, multiply by 30.48, giving 182.88 cm. To convert 10 km to miles, divide by 1.609344, giving 6.21371 miles.
Common length equivalents
1 inch = 2.54 cm · 1 foot = 30.48 cm · 1 yard = 0.9144 m · 1 mile = 1.60934 km · 1 meter = 3.28084 feet · 1 km = 0.621371 miles · 1 nautical mile = 1.852 km.
Frequently asked questions
How many centimeters are in a foot?
There are exactly 30.48 cm in one foot, because a foot is 12 inches and each inch is 2.54 cm.
How many feet is 1 meter?
One meter is about 3.28084 feet, or 3 feet 3.37 inches.
How many miles is 5 km?
A 5 km run is 3.10686 miles. A 10 km race is 6.21371 miles and a marathon (42.195 km) is 26.2188 miles.
What is the difference between a mile and a nautical mile?
A statute mile is 1,609.344 m, used on roads in the US and UK. A nautical mile is 1,852 m, used at sea and in aviation. One nautical mile is about 1.15078 miles.