Free Computer Science Calculators

Bitwise Calculator — AND, OR, XOR

Perform bitwise AND, OR, XOR, NOT, left shift, and right shift on 8/16/32-bit integers. Interactive bit toggle panel, colour-coded bit grid, multi-base output, and common bit manipulation patterns.

Binary Arithmetic Calculator

Add, subtract, multiply, and divide binary numbers with long-form carry/borrow visualization, column-by-column step table, multi-base output, and overflow detection.

Two's Complement Calculator

Convert integers to two's complement binary representation and back.

RGB to HEX Color Converter

Convert colors between RGB, HEX, and HSL formats instantly.

IP Subnet Calculator — CIDR

Calculate subnet mask, network address, broadcast address, and usable hosts for any CIDR.

Floating Point Converter — IEEE 754 Binary

Convert any decimal to its IEEE 754 32-bit and 64-bit binary representation — coloured bit display, field breakdown, special value detection, and hex-to-float reverse conversion. Runs entirely in your browser using JavaScript typed arrays.

Bandwidth Calculator — File Transfer Time & Speed

Calculate file transfer time from file size and connection speed. Convert between all bandwidth units (Mbps, GB, TB), estimate download/upload time, and see how many devices a connection can support simultaneously.