Convert length and distance between km, miles, meters, yards, feet, and inches. Simple and intuitive. Everything runs locally in your browser — nothing is uploaded.
Convert area between square meters, square feet, acres, hectares, and square kilometers. Everything runs locally in your browser — nothing is uploaded.
Convert between hundreds of units — length, mass, volume, temperature, area, speed, time, digital data, and more with a single click.
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results. Everything runs locally in your browser — nothing is uploaded.
Convert steps walked to distance in km and miles. Also estimates calories burned based on height and step count. Everything runs locally in your browser — nothing is uploaded.
Bidirectional converter between vCard (VCF) and CSV formats. Perfect for importing/exporting address books between any platform or service.
1 meter = 3.28084 feet. The converter uses this exact factor for all length calculations.
1 inch = 2.54 cm exactly. This is an international agreement — not an approximation.
A marathon is 42.195 km, which equals approximately 26.2 miles. The exact distance was standardized in 1921.
Converting between metric and imperial lengths — for example, feet to meters for construction, inches to centimeters for screen sizes, or miles to kilometers for running distances.
Yes. All conversions run in your browser using JavaScript. No data is sent to any server.
Unit Converter
Convert between hundreds of units — length, mass, volume, temperature, area, speed, time, digital data, and more with a single click.
Speed Converter
Convert speed between km/h, mph, knots, m/s, and ft/s. Instant conversion for travel and scientific use. Everything runs locally in your browser — nothing is uploaded.