Scientific Calculator

Degrees and radians are two ways of measuring angles. A full circle is 360 degrees, which equals 2π radians (about 6.283). To convert degrees to radians, multiply by π/180.

Press the √ key to apply a square root, or use the ∛ key for a cube root. For other roots like the fourth root, rewrite the exponent (for example, the fourth root of x is x^(1/4)).

The calculator supports basic arithmetic (+ − × ÷ ^), parentheses, the constants π and e, and the functions sin, cos, tan, asin, acos, atan, ln, log, sqrt, cbrt, exp, pow10, sq, cube, recip, factorial, and percent. It also supports scientific notation (for example 1.5E3) and postfix ! and % operators.

An online scientific calculator runs in your web browser and handles advanced math that a basic calculator cannot, such as trigonometry (sin, cos, tan), logarithms (log, ln), exponents, roots, factorials, and constants like pi and e. Ours is completely free, requires no download or sign-up, and includes degree and radian modes for science, engineering, and math students.

Yes. This is a free online calculator with no registration, no ads, and no usage limits. All calculations run instantly in your browser, so your expressions are never sent to a server.

Yes. You can enter fractions directly in the expression, for example 2/3 + 1/6, and the calculator follows standard order of operations to give a decimal result. For adding, subtracting, multiplying, or dividing fractions with simplification, use our dedicated Fraction Calculator.

Yes. Our basic calculator on the home page has large, touch-friendly buttons that are easy to use on phones, tablets, and desktops. It loads instantly, is completely free, and is ideal for simple everyday arithmetic without extra features.

It covers the functions people use most on popular models such as the Casio fx-991 (fx-991EX and fx-991CW): trigonometry, logarithms and natural log, powers, square and cube roots, factorials, scientific notation, and degrees or radians. It is a convenient free online Casio-style calculator for students and professionals.

Yes. Our browser-based scientific calculator includes the core operations found on a typical Casio scientific calculator, including sin, cos, tan, log, ln, square root, pi, powers, and exponents, so you can get comparable results online without carrying a physical device.

The scientific calculator instantly evaluates and solves complex expressions including trigonometry, logarithms, scientific notation, and multi-step arithmetic. For structured math problems, we also offer free online math tools for percentages, fractions, and probability that give clear, correct answers.