Scientific Calculator

A Complete Scientific Calculator in Your Browser

Whether you are a student solving trigonometry problems, an engineer working through logarithmic equations, or anyone who needs more than basic arithmetic, this scientific calculator has you covered. It runs entirely in your browser with no installation, no sign-up, and no limitations.

Features at a Glance

Arithmetic and Order of Operations

All standard operations (addition, subtraction, multiplication, division) with full support for parentheses and correct operator precedence. The calculator uses a proper expression parser, not simple left-to-right evaluation, so expressions like 2 + 3 * 4 correctly return 14, not 20.

Trigonometric Functions

Calculate sine, cosine, and tangent along with their inverse functions (arcsine, arccosine, arctangent). Toggle between degree and radian mode depending on your needs. Degree mode is the default for everyday use, while radian mode is essential for calculus and physics.

Logarithms and Exponentials

Three logarithm bases are available: common logarithm (log base 10), natural logarithm (ln, base e), and binary logarithm (log base 2). Exponential functions include e raised to a power and 10 raised to a power.

Powers and Roots

Square a number, cube it, or raise it to any arbitrary power. Take square roots, cube roots, or use the power operator for any root. These operations nest naturally with parentheses for complex expressions.

Constants

Three mathematical constants are built in: pi (3.14159…), Euler’s number e (2.71828…), and the golden ratio phi (1.61803…). Insert them directly into any expression.

Memory Functions

Store intermediate results with the memory system. Add to memory (M+), subtract from memory (M-), recall the stored value (MR), or clear it (MC). A small indicator shows the current memory value when active.

Calculation History

The calculator keeps your last 10 calculations. Open the history panel to review previous results or click any entry to load that result back into the calculator. This is useful when you need to reference or reuse earlier calculations.

Keyboard Support

Type expressions directly using your keyboard. Numbers, operators, parentheses, and the caret symbol for exponentiation all work. Press Enter to evaluate, Escape to clear, and Backspace to delete the last character.

How It Works Under the Hood

This calculator does not use JavaScript’s eval function. Instead, it implements a recursive descent parser that tokenizes your input and evaluates it with proper operator precedence. This approach is both safer and more mathematically correct, handling edge cases like unary minus, nested parentheses, and right-associative exponentiation.

Common Use Cases

Students: Solve homework problems involving trigonometry, logarithms, and exponents without needing a physical calculator.

Engineers and scientists: Quickly verify calculations involving exponential decay, signal processing, or geometric relationships.

Developers: Check mathematical formulas while coding without leaving the browser or opening a separate application.

Everyday math: Calculate tips with percentages, figure out compound growth, or convert between angle measurements.