Tools that convert values from one unit or format to another. Includes speed, length, timezone, and Base64 converters — everything where you put one thing in and get another out.
Convert speed between mph, km/h, knots, m/s, and Mach. Type a value once and see all units at once.
Convert length between metric and imperial: mm, cm, m, km, inches, feet, yards, and miles. All units at once.
Encode or decode Base64 text instantly in your browser. Nothing is sent to any server.
Generate a QR code from any URL or text instantly. Download as PNG. No account needed, nothing sent to any server.
Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Type in any unit and see all others.
Convert weight between kg, g, mg, lb, oz, stone, and metric tonnes. Type any value and see all units at once.
Convert volume between litres, millilitres, fluid ounces, cups, pints, quarts, gallons, tablespoons, and more.
Convert area between m², cm², km², ft², yd², acres, hectares, and square miles. All units at once.