Math calculators
5 calculators in this category.
Simple Calculator
Fast, free online calculator for everyday math — add, subtract, multiply, divide, percentages, and square roots. Keyboard friendly.
Scientific Calculator
Full scientific calculator with trig, logs, exponents, factorials, and constants like π and e. Parse expressions as you type.
Pythagorean Theorem Calculator
Solve a right triangle from any two sides. Find the missing side, area, perimeter, and angles — with special-triangle detection for classic Pythagorean triples.
Percentage Calculator
Four percentage modes: X% of Y, X is what % of Y, percentage increase or decrease, and percent change between two numbers.
Fraction Calculator
Add, subtract, multiply, and divide fractions. Auto-simplifies and converts between improper, mixed-number, and decimal forms.