Scientific Calculator
Trigonometry, logarithms, powers and roots in one expression.
About this calculator
This scientific calculator evaluates whole expressions rather than one operation at a time, so you can type something like (2+3)^2 × sin(30) and see the result live as you go. It handles trigonometry, logarithms, roots, powers, factorials and nested brackets, with a DEG/RAD switch for angle-based functions.
It follows the standard order of operations — brackets first, then powers, then multiplication and division, then addition and subtraction — the same way it would be worked out on paper.
Frequently asked questions
What does the DEG/RAD switch change?
It sets how sin, cos and tan interpret angles. In DEG mode sin(30) is 0.5 because 30 is read as degrees; in RAD mode the same input is read as 30 radians. Only trigonometric functions are affected — everything else works identically in both modes.
Does the calculator follow order of operations (BODMAS)?
Yes. Brackets are evaluated first, then powers and roots, then multiplication and division left to right, then addition and subtraction. So 2+3×4 is 14, not 20, and you can add brackets — (2+3)×4 — when you want a different grouping.
What does the % symbol do in an expression?
Inside a scientific expression, % is the remainder (modulo) operator: 7%3 is 1. That is standard scientific-calculator behaviour. For everyday percentage maths — like 15% of 80 or a 12% increase — the Percentage Calculator is the right tool.
What is the difference between log and ln?
log is the base-10 logarithm and ln is the natural logarithm (base e ≈ 2.718). log(100) is 2 because 10² = 100, while ln(e) is 1.