About This Scientific Calculator

A scientific calculator handles the math that a basic calculator can't: trigonometric functions, logarithms, powers, roots, factorials, and mathematical constants. It's essential for students, engineers, scientists, and anyone working with technical calculations.

How to Use It

Click the buttons — the calculator handles operator precedence automatically.
Or use your keyboard — numbers, operators, parentheses, Enter for equals, Backspace to delete, Escape to clear.
Switch DEG / RAD — click the badges at the top of the display to change the angle mode for trigonometric functions.
View history — click any past result to reuse it.

Supported Functions

Button	Function	Example
`sin`	Sine (angle in DEG or RAD)	`sin(30)` = 0.5 in DEG
`cos`	Cosine	`cos(60)` = 0.5 in DEG
`tan`	Tangent	`tan(45)` = 1 in DEG
`ln`	Natural logarithm (base e)	`ln(e)` = 1
`log`	Common logarithm (base 10)	`log(100)` = 2
`√`	Square root	`√(16)` = 4
`x²`	Square	`5²` = 25
`xʸ`	Power	`2^10` = 1024
`x!`	Factorial	`5!` = 120
`%`	Percentage (divide by 100)	`50%` = 0.5
`π`	Pi constant	`π` ≈ 3.14159
`e`	Euler's number	`e` ≈ 2.71828

Keyboard Shortcuts

0–9 — digits
. — decimal point
+ − * / — operators
( ) — parentheses
Enter or = — calculate
Backspace — delete last character
Escape — clear all
^ — power
% — percent

Order of Operations

The calculator follows standard mathematical precedence (PEMDAS):

Parentheses first
Exponents (powers, roots)
Multiplication and Division (left to right)
Addition and Subtraction (left to right)

So 2 + 3 × 4 = 14, not 20.

Degrees vs Radians

The angle mode affects trigonometric functions:

DEG mode — angles are in degrees. sin(90) = 1.
RAD mode — angles are in radians. sin(π/2) = 1.

Click the DEG or RAD badge in the display to switch modes.

Common Use Cases

Homework — algebra, trigonometry, calculus problems.
Engineering — electrical, mechanical, and civil calculations.
Physics — computing forces, energies, and constants.
Finance — compound interest and exponential growth.
Programming — testing math functions and bitwise operations.
Construction — angles, slopes, and material estimates.
Everyday math — tips, discounts, and unit conversions.

History

Every calculation you perform is saved in the history panel. Click any entry to reuse its result — perfect for chained calculations. Click "Clear" to wipe the history.

Precision Note

JavaScript uses 64-bit floating point numbers, which can cause tiny rounding errors. For example, 0.1 + 0.2 gives 0.30000000000000004. This is normal for any browser-based calculator and matches how Python, Java, and most programming languages work.

Related Tools

Construction Calculators — material estimators for real-world projects.
Unit Converter — convert between units of measurement.
BMI Calculator — body mass index.
Loan EMI Calculator — calculate loan repayments.

Privacy Note

Everything runs in your browser. Your calculations are never uploaded, stored, or shared.