Convert meters, km, miles, feet, inches, yards. Free length converter.
Length conversion is one of the most common everyday calculations, especially when working across metric and imperial measurement systems. Whether you are measuring room dimensions in feet and need the result in meters, comparing running distances in miles and kilometers, or converting product specifications between centimeters and inches, this converter handles it instantly. It supports eight commonly used units: meters, kilometers, centimeters, millimeters, miles, yards, feet, and inches. All conversions are bidirectional and update in real time as you type, making it easy to compare values across different unit systems without memorizing conversion factors.
Select your source unit and target unit from the dropdown menus, enter a value, and the converted result appears instantly. The converter uses internationally standardized conversion factors. All units are defined relative to the meter: 1 inch equals exactly 0.0254 meters, 1 foot equals 0.3048 meters, 1 mile equals 1609.344 meters, and so on. The calculator multiplies your input by the source unit factor, then divides by the target unit factor.
Travelers convert between miles and kilometers for driving distances. Interior designers switch between feet and meters for room measurements. Engineers convert between millimeters and inches for technical specifications. Runners compare race distances in different unit systems. Online shoppers convert product dimensions listed in unfamiliar units. Students solve physics problems requiring unit conversions.
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One inch equals exactly 2.54 centimeters. This is an internationally defined exact value, not an approximation. To convert inches to centimeters, multiply by 2.54. To convert centimeters to inches, divide by 2.54.
Multiply the number of miles by 1.60934 to get kilometers. For a quick mental approximation, multiply by 1.6. For example, 10 miles is approximately 16.1 kilometers. To convert kilometers to miles, divide by 1.60934 or multiply by 0.6214.
A nautical mile equals 1,852 meters or about 1.151 regular (statute) miles. Nautical miles are used in aviation and maritime navigation because one nautical mile corresponds to one minute of latitude, making them practical for navigation on charts.
Most countries adopted the metric system during the 19th and 20th centuries because of its decimal-based simplicity. The United States, Liberia, and Myanmar are the only countries that have not fully adopted the metric system for everyday use, though the US uses metric units extensively in science, medicine, and the military.
Divide the number of square feet by 10.764 to get square meters. For example, a 1,000-square-foot apartment is approximately 92.9 square meters. Note that area conversions use the square of the linear conversion factor.