Free Math Calculators
Our free math calculators give you instant answers to mathematical calculations — from basic arithmetic and percentages to advanced scientific functions including trigonometry, logarithms, and exponents. Clean interfaces designed for fast, accurate calculation on any device.
All math calculators
Math made simple
Whether you're a student working through coursework, a professional needing quick calculations, or anyone who needs to solve a math problem fast — our math calculators deliver accurate results without complexity or clutter. No ads blocking the keypad. No unnecessary steps. Just the calculation you need.
What our math calculators cover
Scientific Calculator
A full-featured scientific calculator with all the functions you'd expect from a physical scientific calculator — plus the convenience of always being in your browser. Handles basic arithmetic operations, trigonometric functions (sin, cos, tan and their inverses), logarithmic functions (log and ln), exponents and square roots, parentheses for order of operations, pi and Euler's number, and memory functions. Whether you're working through algebra, calculus, physics, or engineering problems, the scientific calculator handles the computation so you can focus on the concepts.
Percentage Calculator
Three percentage calculators in one page handling every common percentage scenario. Find what percentage of a number something is. Determine what percentage one number represents of another. Calculate the percentage difference between two values. Find the percentage increase or decrease between a starting and ending value. Includes clear explanations of the percentage difference formula and percentage change formula so you understand the math behind your results.
When to use each calculator
Use the Scientific Calculator when you need trigonometry, logarithms, order of operations, or radians vs degrees — for school, work, or engineering. Use the Percentage Calculator for discounts, tips, price changes, margins, and comparing values as percentages.
Our math calculators are used by students from middle school through university, teachers preparing examples, professionals doing quick calculations, and anyone who needs reliable mathematical results instantly. The scientific calculator replicates the functionality of physical scientific calculators like the TI-30 or Casio fx series — always available in your browser without batteries or carrying an extra device. The percentage calculator handles the everyday percentage math that comes up constantly in shopping, finance, work, and school.
Browse the full calculator directory for other categories.