Math Calculator
Percentages, GCD/LCM, primes, Fibonacci sequences, and safe expression eval.
Developer math utilities
Percentage change, GCD/LCM, prime checks, Fibonacci sequences, and safe arithmetic expressions support interview prep, sizing estimates, and quick validation of algorithm outputs without opening a spreadsheet.
Floating-point arithmetic inherits IEEE-754 rounding. Financial calculations need decimal libraries in production code, not browser eval demos.
Expression evaluators must reject arbitrary code execution; safe subsets whitelist operators and functions only.
Run calculations locally on capacity planning numbers from internal forecasts.
Reference Guide
Tech tool - all processing runs locally in your browser. No data is sent to a server.
Operation: percentage
Paste input, click Run, and copy the result. For two-input tools, fill both fields before running.
Example Input
150,100
A sample loads automatically when you open this tool. Use Load Sample to reset it.