How do I convert binary to decimal?

Enter a binary number (e.g., 1010) and the tool instantly shows the decimal equivalent (10), plus hex and octal representations.

Which unit conversions are available?

Temperature (C/F/K), length (km/mi/m/ft), weight (kg/lb/oz/g), and digital storage (bytes through terabytes).

Convert between number systems (binary, decimal, hex), units (temperature, length, weight, bytes), Roman numerals, and color formats.

Convert binary numbers to decimal, hexadecimal, and octal.

Convert between Bytes, KB, MB, GB, TB, and PB with all equivalents shown at once.

Convert colors between HEX, RGB, and HSL formats with a live preview swatch.

Convert decimal numbers to binary, hexadecimal, and octal.

Convert decimal numbers to hexadecimal, binary, and octal.

Convert hexadecimal numbers to decimal, binary, and octal.

Convert between mm, cm, m, km, inches, feet, yards, and miles.

Convert between Roman numerals and decimal numbers in both directions.

Convert between Celsius, Fahrenheit, and Kelvin temperature scales.

Convert weights between milligrams, grams, kilograms, ounces, pounds, and metric tons.

How do I convert binary to decimal?: Enter a binary number (e.g., 1010) and the tool instantly shows the decimal equivalent (10), plus hex and octal representations.
Which unit conversions are available?: Temperature (C/F/K), length (km/mi/m/ft), weight (kg/lb/oz/g), and digital storage (bytes through terabytes).