Scientific calculator

What is the Scientific Calculator?

This is a full-featured scientific calculator that runs entirely in your browser — no app to download, no account to create. Beyond the basic four operations, it supports trigonometric functions, logarithms, powers and roots, factorials, memory storage, and both degree and radian angle modes, covering everything a student, engineer, or curious number-cruncher typically needs.

Every calculation happens instantly on your device. Nothing you type is transmitted anywhere, so you can use it for schoolwork, lab reports, or quick engineering checks with complete privacy.

How to use it

1. Click the number and operator buttons to build your expression, just like a physical calculator.
2. For functions like sin, cos, log, or √x, click the function first, and it will apply to the number currently on the display (or to the result of your expression so far).
3. Press = to evaluate the full expression.
4. Use AC to clear everything, or ⌫ to delete the last character.

Available functions

• sin, cos, tan: standard trigonometric functions, calculated in either degrees or radians depending on the mode you select
• log: base-10 logarithm
• ln: natural logarithm (base e)
• √x: square root
• x²: square (x raised to the power of 2)
• xʸ: raises the current number to any power you enter next
• n!: factorial — the product of all positive integers up to n
• 1/x: reciprocal of the current number
• π and e: insert the constants pi (≈3.14159) and Euler's number (≈2.71828)
• ±: toggles the sign of the current number between positive and negative

Degrees vs. radians

Trigonometric functions can be calculated in two different angle units. Degrees (DEG) is the everyday unit most people learn in school, where a full circle is 360°. Radians (RAD) is the unit most commonly used in higher mathematics, physics, and engineering, where a full circle is 2π radians. Use the DEG/RAD toggle above the display to switch between them — this affects sin, cos, and tan calculations only.

Using memory functions

The memory buttons let you store a number and reuse it later without retyping it:

• M+ adds the current display value to memory
• M− subtracts the current display value from memory
• MR recalls the stored memory value onto the display
• MC clears the memory back to zero

A small indicator appears above the display whenever a non-zero value is stored in memory, so you always know when memory is active.

Order of operations

The calculator follows the standard mathematical order of operations (PEMDAS/BODMAS) — parentheses and functions first, then exponents, then multiplication and division, then addition and subtraction — so complex expressions evaluate the way you'd expect from a scientific calculator.

Common uses

• Homework and exam practice for algebra, trigonometry, and pre-calculus
• Quick engineering or physics calculations involving angles, logs, or exponents
• Statistics and probability work involving factorials
• Everyday math that goes beyond what a basic calculator can handle

Frequently asked questions

Why did I get an unexpected result from a trig function?

Double-check whether you're in DEG or RAD mode — the same input produces very different results depending on the angle unit, and this is the most common source of confusion with scientific calculators.

What happens if I try to divide by zero or take the square root of a negative number?

The calculator will show an error, since these operations are undefined in standard real-number arithmetic.

Can I chain multiple operations together?

Yes — you can build a full expression with multiple operators and functions before pressing equals, just like on a physical scientific calculator.

Does the factorial function work with decimals?

Factorial is defined for non-negative whole numbers, so decimal or negative inputs to n! will return an error.