Scientific Calculator
Trig, log, exponents, roots, factorial, memory & degree/radian modes.
What Is a Scientific Calculator?
A scientific calculator is a calculator with the operations needed for algebra, trigonometry, calculus, and engineering — not just basic arithmetic. In addition to + − × ÷, it supports trigonometric and inverse-trigonometric functions, natural and base-10 logarithms, exponentials, powers and roots, factorial, and the constants π and e. Most scientific calculators also include a memory store, parentheses for grouping, and a degree/radian mode for angle inputs.
This browser-based tool is the digital equivalent of a Casio fx-991 or TI-30XS — no install, no signup, and it works offline once the page is cached. Type or tap; either input style is fully supported.
Basic vs. Scientific Calculator
Basic
Four-function arithmetic (+ − × ÷), percentage, and a single memory. Sufficient for shopping, tips, and basic bookkeeping — but it cannot evaluate sin(30°) or log(1000).
Scientific
Everything a basic calculator does, plus trig, logs, exponents, factorials, π and e, parentheses, and order-of-operations parsing (PEMDAS). Used in high-school math onward and in every engineering and physical-science discipline.
Common Functions Explained
Trigonometry (sin, cos, tan)
Trigonometric functions take an angle and return a ratio. The calculator's DEG/RAD toggle controls how that angle is interpreted. Example: sin(30°) = 0.5 in DEG mode, but sin(30) ≈ −0.988 in RAD mode (because 30 radians ≈ 1718°).
Inverse trigonometry (sin⁻¹, cos⁻¹, tan⁻¹)
These invert sin/cos/tan: given a ratio, they return an angle. Press 2nd to reveal them on the trig keys. Domain: sin⁻¹ and cos⁻¹ require inputs between −1 and +1.
Logarithms (ln, log)
ln(x) is the natural log (base e ≈ 2.71828). log(x) is base-10 by convention. Example: log(1000) = 3 because 10³ = 1000. The input must be strictly positive.
Powers and roots (x², x³, xʸ, √, ∛)
x² and x³ append ^2 and ^3 to the current expression. xʸ inserts the ^ operator so you can type any exponent. √ and ∛ are square and cube roots; press 2nd on √ to switch to ∛.
Factorial (n!)
n! = n × (n−1) × … × 1. Defined only for non-negative integers. Example: 5! = 120. The calculator caps at 170! to avoid overflow (171! exceeds the IEEE-754 double-precision limit).
Constants π and e
π ≈ 3.14159265358979 is the ratio of a circle's circumference to its diameter. e ≈ 2.71828182845905 is the base of the natural logarithm. Both are inserted as full-precision symbols and only resolved to numbers at evaluation time.
Degree vs. Radian Mode
An angle can be measured in degrees (one full turn = 360°) or radians (one full turn = 2π ≈ 6.2832). Use DEG for geometry and most high-school problems; use RAD for calculus, physics, and almost all computer graphics math. The active mode is displayed in the toolbar — switching it does not change your current expression, only the next evaluation.
sin(30) ≈ −0.988 when you expected 0.5), you're probably in radian mode. Toggle to DEG.Keyboard Shortcuts
Where Scientific Calculators Are Used
Students
Trigonometry, algebra II, pre-calculus, statistics, SAT/ACT math — all routinely require log, trig, and exponent functions.
Engineers
Electrical, mechanical, civil, and aerospace work depends on logarithms (decibels), trig (vectors, phase), and exponential decay.
Programmers
Floating-point exploration, big-O exponent intuition, hash and modulo math, color/luminance gamma calculations.
Physicists
Half-life and growth problems (exp, ln), wave mechanics (trig), and orders-of-magnitude reasoning (log).
Finance
Continuous compounding (eˣ), present-value formulas (powers), and log-returns.
Competitive exams
JEE, NEET, GRE Quant, GMAT, Olympiads — all permit scientific calculators and reward speed with parens and constants.