About Our Math Calculators
Calculator200.com's math tools cover everything from quick percentage calculations to advanced statistics, geometry, and algebra. Every calculator shows step-by-step work where possible, making them useful for students, professionals, and anyone who needs to verify their math quickly.
Percentage & Basic Math
The percentage calculator is our most-used tool. It handles five types of percentage problems in one place: finding X% of a number, what percent X is of Y, percentage change, reverse percentage, and percentage difference. The average calculator computes mean, median, mode, and range from any list of numbers.
Statistics Tools
The standard deviation calculator works for both population and sample data, showing variance, mean, and a full data breakdown. The z-score calculator converts between raw scores and standard scores and finds probabilities from the standard normal distribution.
Geometry Calculators
The area calculator covers 15+ shapes including circle, triangle, rectangle, parallelogram, trapezoid, ellipse, sector, and more. Each shape shows the formula used alongside the result.
Can I use these calculators on a test or exam?
These tools are intended for homework help, learning, and professional use outside of formal test environments. Whether electronic calculators are permitted on a specific exam is governed by that exam's rules. Always follow your institution's academic integrity policies.
Do the calculators show step-by-step solutions?
Many of our math calculators show step-by-step work — including the quadratic equation solver, fraction calculator, Pythagorean theorem calculator, and percentage calculators. Steps are shown directly below the result.