Scientific Calculator
Full scientific calculator with trig, logarithms, powers, and keyboard support.
How to use
- Click buttons or use your keyboard — numbers, operators (+, -, *, /), Enter for equals, and Escape to clear.
- Toggle DEG / RAD to switch between degree and radian mode for trig functions.
- Use ANS to insert the previous result into the current expression.
- Scientific functions like sin, cos, log, and √ require a closing parenthesis — e.g. sin(30).
- xʸ raises the current number to a power — e.g. 2^(10) = 1024.
- AC clears everything; ⌫ deletes the last character.
- Calculation history is shown below the display.
About this Scientific Calculator
A scientific calculator extends basic arithmetic with the functions needed for algebra, trigonometry, and higher math — exponents, roots, logarithms, and trig functions — without needing a dedicated graphing calculator or software.
Order of operations
Calculations follow standard order of operations (PEMDAS): parentheses first, then exponents, then multiplication and division left to right, then addition and subtraction left to right. 2 + 3 × 4 evaluates to 14, not 20, because multiplication happens before addition regardless of the order the numbers appear in.
Degrees vs. radians
Trigonometric functions (sin, cos, tan) can be calculated using either degrees (0–360° for a full circle) or radians (0–2π), and using the wrong mode is one of the most common calculator mistakes. Most everyday and geometry problems use degrees; calculus and physics problems typically use radians. Always confirm which mode is active before reading a trig result.
Logarithms: log vs. ln
"log" (without a subscript) conventionally means base-10 logarithm, while "ln" means natural logarithm (base e, approximately 2.71828). log(100) = 2 because 102 = 100. Natural log is common in calculus, growth/decay problems, and compound interest formulas.