Percentage calculators, base converters, bitwise operations, and mathematical utilities.
Math and calculator tools handle the numerical operations that come up during development — percentage calculations, bitwise operations, base conversions, and more. Whether you're calculating percentage changes for analytics dashboards, working with bitwise flags in systems programming, or converting between number systems, these calculators give you instant results without writing throwaway scripts. The bitwise calculator is especially useful for working with permission flags, network masks, and low-level data manipulation where you need to visualize binary operations.
Popular in Math & Calculators
Calculate percentages, percent change, and ratios
Free online percentage calculator. Calculate X% of Y, find what percent X is of Y, and compute percentage change between two values.
Calculate and lock aspect ratios for width and height
Free online aspect ratio calculator. Calculate aspect ratios, resize dimensions proportionally, and find equivalent widths and heights.
Perform bitwise AND, OR, XOR, NOT, and shift operations
Free online bitwise calculator. Perform AND, OR, XOR, NOT, left shift, and right shift operations and see results in decimal, hexadecimal, and binary.
All Math & Calculators
Calculate percentages, percent change, and ratios
Calculate and lock aspect ratios for width and height
Perform bitwise AND, OR, XOR, NOT, and shift operations
Full scientific calculator with trigonometric and logarithmic functions
Perform arithmetic on hexadecimal numbers
Perform arithmetic on binary numbers
Perform matrix addition, multiplication, transpose, and determinant
Calculate greatest common divisor and least common multiple
Check if a number is prime and find primes in a range
Generate Fibonacci sequence up to N terms
Convert numbers between any bases from 2 to 36
Convert between Roman numerals and decimal numbers
Convert IP addresses to decimal and back
Mix, blend, lighten, and darken colors with operations
Calculate PPI, aspect ratio, and megapixels from dimensions
Calculate DPI and print sizes from image dimensions
No browser-only tools in this category.
About Math & Calculators
Percentage calculators, base converters, bitwise operations, and mathematical utilities. All tools in this category run entirely in your browser with no server-side processing. Your data stays on your device.
Each tool is designed for speed and simplicity. Paste your input, configure options if needed, and copy the result with one click. No sign-up, no installation, no limitations.