Math Calculators

From fractions and percentages to geometry and statistics, these math calculators handle common school and work problems quickly and accurately.

Why use math calculators?

Even simple operations like adding fractions or finding a percentage of a value can be tedious and error-prone when done repeatedly. For geometry and statistics, formulas are easy to misapply. Our tools apply the correct formulas so you can focus on interpreting results and making decisions.

What you'll find here

We offer a fraction calculator (add two fractions, result as decimal), a percentage calculator (what is X% of Y?), a triangle area calculator (base and height), and a standard deviation calculator (population standard deviation for a set of values). Each is designed for a single, well-defined task so you get the answer without extra steps.

When to use each tool

Use the fraction calculator for quick addition of fractions and decimal conversion. The percentage calculator is handy for discounts, tips, and proportions. The triangle calculator gives area from base and perpendicular height. The standard deviation calculator helps with data spread for a small set of numbers. For homework or professional use, double-check that the tool matches your problem (e.g. population vs sample standard deviation).