Math Calculators

Math

Statistics

Geometry

Middle school students. This is where fractions, ratios, and LCM/GCF live. The Fraction Calculator handles the arithmetic — including mixed numbers — while the Ratio Calculator and LCM & GCF Calculator cover the proportional reasoning and number-theory topics that show up in grades 6–8. If homework asks you to simplify, find a common denominator, or solve a proportion, start here.

High school students. Algebra and geometry bring the Quadratic Formula Calculator (every second-degree equation, with the discriminant explained), the Log Calculator (base 10, natural log, and any custom base for those log-equation problem sets), the Scientific Notation Calculator (chemistry and physics love powers of ten), and the Triangle Calculator — area from base and height, or from three sides with Heron's formula when the height isn't given.

Statistics and science students. The Mean Median Mode Calculator and Standard Deviation Calculator take any data set and return the summary statistics lab reports and stats classes ask for, with population and sample standard deviation clearly separated. The Percent Error Calculator finishes the job on lab write-ups: experimental versus theoretical, as a clean percentage.

How to pick the right calculator

Match the tool to the question being asked. Combining or comparing fractions? Fraction Calculator. Summarizing a list of numbers? Mean Median Mode Calculator for the averages, Standard Deviation Calculator for the spread. A triangle with two known measurements? Triangle Calculator. An equation in the form ax²+bx+c=0? Quadratic Formula Calculator. Simplifying or completing a ratio? Ratio Calculator. Biggest shared divisor or smallest shared multiple? LCM & GCF Calculator. A very large or very small decimal? Scientific Notation Calculator. Checking a lab measurement? Percent Error Calculator. Rewriting exponential relationships? Log Calculator.

Check, don't copy: getting real value from a calculator

A calculator that only gives answers teaches you nothing — which is why every tool on this page shows its work. The winning study habit is simple: try the problem by hand first, then run it through the calculator and compare. If your answer matches, your method is solid. If it doesn't, the step-by-step working shows you exactly where the two paths diverged, and that gap is precisely what you need to learn before the test. Teachers can spot copied answers; they can't argue with a student who understands the steps.