Scientific calculator: functions and usage
All the functions of a school and university calculator, in your browser
A scientific calculator goes far beyond the four basic arithmetic operations. It handles parentheses, powers, roots, trigonometry and logarithms and evaluates entire expressions with the correct mathematical order of operations: parentheses first, then powers, then multiplication and division before addition and subtraction. The input "2 + 3 × 4" therefore gives 14 – unlike the basic calculator, which strictly calculates from left to right.
For trigonometry, sin, cos and tan are available along with their inverse functions sin⁻¹, cos⁻¹ and tan⁻¹ (via the 2nd key). The angle mode can be switched between degrees (DEG) and radians (RAD): sin(30) gives 0.5 in DEG mode, sin(π ÷ 2) gives 1 in RAD mode. For growth and decay calculations there is the natural logarithm ln, the base-10 logarithm log, and the exponential function eˣ.
The constants π and e each have their own key, powers are available via xʸ, x² and x³, roots via √ and ∛. The factorial n! (e.g. 5! = 120) is useful for combinatorics and probability calculations. The calculator runs entirely in your browser – no app, no sign-up, free and privacy-friendly.