Scientific Calculator — Full Math Power Online

Solve trig, logarithms, factorials, and complex expressions instantly — right in your browser. This free online scientific calculator includes memory functions, a 10-entry history panel, full keyboard support, DEG/RAD mode toggle, and a clickable physics constants panel.

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Degrees mode
History
No history yet
Constants

Free Online Scientific Calculator — Complete Feature Guide

This online scientific calculator goes far beyond basic arithmetic. It handles the full range of mathematical operations needed for high school, university, engineering, and scientific work — all without installation or login. Every calculation runs locally in your browser using a safe custom expression parser.

How to Use the Scientific Calculator

  1. Click buttons or type directly on your keyboard — digits, operators, and parentheses all work.
  2. Select DEG or RAD mode to match your problem's angle units before using trig functions.
  3. Use function buttons like sin(, log(, or √ to build complex expressions.
  4. Press Enter or click = to evaluate — the result appears in the display and is saved to history.
  5. Click any entry in the History panel to reload it for editing or re-evaluation.
  6. Click a constant in the Constants panel to insert its value (π, e, c, g, etc.) directly into the expression.

Key Features

  • Full trigonometric functions: sin, cos, tan, asin, acos, atan, sinh, cosh, tanh
  • Logarithms: natural log (ln), base-10 log, binary log (log₂)
  • Power and root: xʸ, x², √, 1/x, |x|, n!
  • Memory keys: M+, M−, MR, MC and ANS for chained calculations
  • 10-entry history panel — click any entry to reload it
  • DEG/RAD mode toggle for flexible angle handling
  • Physics constants panel: π, e, φ, √2, speed of light, Planck, Avogadro, gravity
  • Full keyboard support for efficient desktop use

Use Cases

Online Scientific Calculator for Students

From high school trigonometry to university calculus and statistics, this calculator handles the mathematical depth most courses require. Switch between degrees and radians in one click — no re-entering expressions when your professor changes notation. For descriptive statistics work such as finding the mean, median, and standard deviation of a dataset, the dedicated average calculator provides a faster workflow.

Scientific Calculator with Trig Functions for Engineering

Engineers routinely chain sin, cos, and tan across complex expressions. The ANS key and history panel let you carry results forward without copying numbers manually, reducing transcription errors in multi-step engineering calculations.

Calculator with Physics Constants for Science

The constants panel gives you one-click access to the speed of light (c), Planck constant (h), Avogadro's number (Nₐ), and gravitational acceleration (g). Insert any constant directly into your current expression to eliminate lookup errors.

Safe Expression Evaluation

This calculator uses a custom Shunting-yard algorithm to parse and evaluate infix expressions without using JavaScript's eval(). Only valid mathematical tokens are processed — arbitrary code injection is impossible.

FAQ's

Press the EXP button to insert the exponent notation (e.g., 1.5 EXP 3 means 1.5 × 10³ = 1500). You can also type the full expression using the caret operator: 1.5 * 10^3. Results exceeding 10¹⁵ are automatically displayed in scientific notation.
sin, cos, and tan are trigonometric functions used for angles in triangles and circles. sinh, cosh, and tanh are hyperbolic functions related to the hyperbola — they appear in physics, engineering, and complex analysis and are not affected by DEG/RAD mode.
Factorial (n!) multiplies all positive integers up to n. For example, 5! = 120. Enter a non-negative integer and press n!. Values above 170 exceed JavaScript's floating-point range and return Infinity.
History is kept for the current browser session only — the last 10 expressions are stored in memory. Refreshing the page clears history. No data is sent to any server; all calculations happen locally in your browser.
Use DEG mode when working with angles expressed in degrees (everyday geometry, most high school problems). Use RAD mode for calculus, physics formulas, and problems where angles are expressed as multiples of π. In DEG mode, sin(90) = 1; in RAD mode, sin(π/2) = 1.
ANS inserts the result of your most recent calculation into the current expression. This lets you chain multi-step calculations — for example, calculate a result, then press ANS * 2 to double it without retyping.
No. The calculator uses a custom implementation of the Shunting-yard algorithm to safely parse and evaluate infix mathematical expressions. JavaScript's eval() function is never called, so arbitrary code cannot be injected through the input.

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The Toolaroid Scientific Calculator is a free, browser-based tool designed for students, engineers, scientists, and anyone who needs more than basic arithmetic. It covers trigonometry, logarithms, factorials, hyperbolic functions, powers, roots, and memory operations — all evaluated through a safe custom parser with no eval(). For quick percentage calculations such as percentage change or finding what percentage one value is of another, the dedicated percentage calculator is a handy companion. The DEG/RAD toggle, physics constants panel, and 10-entry history panel make it a practical daily driver for academic and professional work. No installation, no account, and no data sent to any server — just open the page and calculate.