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Scientific Calculator

Math Tools Updated 2025 100% Private

Evaluate complex mathematical expressions with a full-featured scientific calculator. Includes trigonometry, logarithms, exponents, factorials, parentheses, and constants — all evaluated safely in your browser with no data sent anywhere.

Scientific Calculator

Trig functions use radians. Use pi/180 to convert degrees. Examples: 2+3*4, sin(pi/2), log(1000), 5!, 2^10.

What is a Scientific Calculator?

A scientific calculator is a calculator designed to handle far more than the four basic arithmetic operations. In addition to adding, subtracting, multiplying, and dividing, it can evaluate trigonometric functions such as sine, cosine, and tangent; logarithmic and exponential functions; powers and roots; factorials; and complex expressions involving parentheses and the proper order of operations. The first pocket scientific calculators appeared in the early 1970s and quickly replaced slide rules in engineering, physics, and mathematics classrooms around the world.

Today, scientific calculators are as likely to live in a browser tab as on a desk. The key advantage of a digital scientific calculator is that it accepts expressions in their full written form — for example, 2 + 3 * sin(pi/4) — rather than requiring you to press buttons in a rigid sequence the way an old hardware calculator did. This makes them ideal for exploring mathematical ideas, verifying homework, and prototyping formulas before coding them into a spreadsheet or program.

Our scientific calculator evaluates every expression entirely in your browser. Nothing you type is ever transmitted to a server, which means it works offline once the page has loaded and your calculations remain completely private. The underlying parser is a hand-written recursive descent evaluator, not the JavaScript eval function, so only mathematical operations and the supported functions can be executed — there is no way for input to run arbitrary code.

The Order of Operations

PEMDAS / BODMAS 1. Parentheses → 2. Exponents and roots → 3. Multiplication and Division (left to right) → 4. Addition and Subtraction (left to right)
Unary minus binds tighter than multiplication; postfix factorial binds tightest.
Example

Evaluate 2 + 3 * 4 ^ 2 - sqrt(16)

  • Exponent: 4 ^ 2 = 16 → 2 + 3 * 16 - sqrt(16)
  • Square root: sqrt(16) = 4 → 2 + 3 * 16 - 4
  • Multiply: 3 * 16 = 48 → 2 + 48 - 4
  • Add and subtract left to right: 2 + 48 = 50, then 50 − 4 = 46

How to Use

  1. Build an expression by clicking the buttons, or type directly into the display field.
  2. Use parentheses ( and ) to group sub-expressions and override default precedence.
  3. Use ^ for powers, sqrt( for square root, log( for base-10 log, and ln( for natural log.
  4. Insert constants pi and e with their dedicated buttons, or type them.
  5. Click = Evaluate to compute the result. Errors such as unmatched parentheses are shown beneath the display.

Supported Functions and Operators

Arithmetic
+   −   *   /   %   ^ for add, subtract, multiply, divide, modulo, and power operations.
Trigonometry
sin cos tan in radians. Use pi/180 to convert degrees before applying these functions.
Logarithms & Roots
log(x) base-10 logarithm, ln(x) natural logarithm, and sqrt(x) square root.
Constants & Factorials
pi ≈ 3.14159, e ≈ 2.71828, and postfix n! factorial up to 170!

Scientific Calculator FAQs

What is the difference between a scientific and a basic calculator?
A basic calculator handles only the four arithmetic operations plus percentages and square roots. A scientific calculator adds trigonometric functions, logarithms, exponents, factorials, constants like pi and e, parentheses for grouping, and memory for longer expressions. Our online scientific calculator provides all of these features directly in your browser.
What does PEMDAS or BODMAS mean?
PEMDAS and BODMAS are mnemonic rules for the order of operations. PEMDAS stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. BODMAS uses Brackets, Orders, Division, Multiplication, Addition, Subtraction. Both produce the same result and ensure expressions like 2 + 3 × 4 evaluate to 14, not 20.
Are angles in degrees or radians?
Our calculator evaluates trigonometric functions using radians, which is the standard unit in higher mathematics and most programming languages. To convert degrees to radians, multiply by pi divided by 180. For example, sin of 30 degrees is sin(30 × pi / 180), which equals 0.5. A degree-mode toggle may be added in future updates.
What is the factorial function and what is its limit?
The factorial of a non-negative integer n, written n!, is the product of all positive integers up to n. For example, 5! = 1 × 2 × 3 × 4 × 5 = 120. Factorials grow extremely fast and are commonly used in combinatorics and probability. Our calculator supports factorials up to 170, beyond which the result exceeds standard floating-point range.
How are logarithms evaluated here?
The log button computes the common logarithm, base 10, which is useful for pH, decibels, and the Richter scale. The ln button computes the natural logarithm, base e, which appears throughout calculus and continuous growth problems. For other bases, use the change-of-base formula: log base b of x equals log(x) divided by log(b).
Can I use parentheses to override the default order of operations?
Yes. Parentheses let you force a particular evaluation order regardless of operator precedence. For example, 2 + 3 × 4 normally equals 14, but (2 + 3) × 4 equals 20. Nested parentheses are supported, and the calculator tracks matching pairs so you can build complex expressions with confidence.