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🔢 Base Converter Convert binary/octal/hex numbers 💯 Number Formatter Add thousands separators & decimals 📊 Percentage Calculator Calculate percentage increase/decrease ⚖ BMI Calculator Calculate BMI from height & weight 🎲 Random Number Generator Generate random numbers in range ⚡ Bitwise Calculator AND/OR/XOR/NOT bitwise operations 📐 Ratio Calculator Calculate proportional scaling 🔢 Prime Number Checker Check if a number is prime 🌀 Fibonacci Sequence Generate Fibonacci sequence 🔢 Factorial Calculator Calculate large integer factorials 💰 Loan Calculator Calculate monthly payments & interest 🔢 Scientific Notation Converter Convert scientific notation