Scientific Calculator
A full scientific calculator with trigonometric functions, logarithms, powers, roots, factorials, and the constants π and e — switch between degree and radian angle modes.
Scientific Calculator
Enter an expression using the keypad.
How It Works
A scientific calculator extends basic arithmetic with functions used in trigonometry, algebra, and calculus. Trigonometric functions (sin, cos, tan and their inverses) depend on angle mode: in Degree mode, sin(90) = 1; in Radian mode, the same input is interpreted as 90 radians, giving a very different result — always check the DEG/RAD indicator. log(x) computes the base-10 logarithm, while ln(x) computes the natural logarithm (base e). The power key (xʸ) raises a number to any exponent, √ takes the square root, and n! computes the factorial (product of all positive integers up to n) — used in combinatorics and probability. The constants π (≈3.14159) and e (≈2.71828) are built in for direct use in expressions.
Formula
Trig functions use the selected angle mode (DEG/RAD). Powers via x^y, roots via √, factorial via n!, logs via log (base 10) and ln (natural).
Frequently Asked Questions
What is the difference between DEG and RAD mode?
Degrees and radians are two ways of measuring angles. A full circle is 360° or 2π radians. In DEG mode, sin(90) = 1 (90 degrees). In RAD mode, sin(90) treats 90 as radians (≈14.3 full rotations), giving a very different answer. Always match the mode to how your angle is expressed.
What is the difference between log and ln?
log(x) is the base-10 logarithm (how many times you multiply 10 to get x). ln(x) is the natural logarithm, base e (≈2.71828), fundamental in calculus and growth/decay problems.
How does factorial (n!) work?
n! (n factorial) multiplies all positive integers from 1 up to n. For example, 5! = 5×4×3×2×1 = 120. It is used in permutations, combinations, and probability calculations. 0! is defined as 1.
How do I calculate a square root or cube root?
Use the √ button for square root (e.g., √16 = 4). For other roots, use the power key with a fractional exponent — e.g., 8^(1/3) = 2 for a cube root.
What are π and e used for?
π (pi, ≈3.14159) relates a circle’s circumference to its diameter and appears throughout trigonometry and geometry. e (≈2.71828) is the base of natural logarithms and appears in compound growth, calculus, and exponential functions.