Calculators
Math Expression Evaluator
Evaluate mathematical expressions with variables, functions, and unit conversions
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly
Entropy Calculator
Calculate Shannon entropy and character frequency distribution of any text or data
Checksum Calculator
Calculate CRC-8, CRC-16, CRC-24, CRC-32, Adler-32 checksums and validate Luhn (credit card) numbers