Scientific · DEG / RAD · Full keyboard support

Scientific CasioCalculator.Online

Trigonometry, logarithms, powers, roots, factorials and constants — all in a clean Casio-style keypad you can drive entirely from your keyboard.

Standard Scientific
DEG
 
0

Type with your keyboard · Enter =, Esc AC, ⌫ Del · s c t = sin cos tan

Every function you need

A complete scientific toolkit, organized for fast input.

📐

Trigonometry

sin, cos, tan with a DEG/RAD toggle so angles always behave the way you expect.

📊

Logarithms

Base-10 log and natural ln for growth, decay and scientific notation work.

⬆️

Powers & Roots

x², xʸ and √ for quick exponentiation and square roots in any expression.

π

Constants

π and e built in to full precision — just tap or type to insert them.

!

Factorial & Inverse

n! and 1/x for combinatorics, probability and reciprocal calculations.

⌨️

Keyboard Driven

Letter shortcuts insert functions instantly so your hands stay on the keys.

Quick tips

Get the most out of scientific mode.

🔁

DEG vs RAD

Tap the DEG button to switch to radians. The badge on the display shows the current mode.

( )

Group with parentheses

Functions open a bracket for you: sin(30) computes correctly, 0.5 in degrees.

⌫

Fix mistakes fast

DEL removes a whole function token like sin( in one press. AC clears everything.

Just need the basics?

The standard calculator is clean, quick, and keyboard-friendly too.

Open Standard Calculator

A Complete Guide to Scientific Calculator Functions

A scientific calculator goes far beyond simple arithmetic. It adds trigonometry, logarithms, exponents, roots and mathematical constants, making it the tool of choice for students, engineers and scientists. The Scientific CasioCalculator.Online keypad puts all of these functions one tap away, and every one of them works from your keyboard too. Below is a breakdown of each function group with real calculations you can reproduce in the calculator above.

Trigonometry: sin, cos and tan

The trigonometric functions describe the relationships between the angles and sides of a triangle, and they appear everywhere from physics to construction to computer graphics. The most important detail is the angle mode: this calculator can work in degrees or radians, and the badge on the display always tells you which one is active. Tap the DEG button to switch. A right angle is 90 degrees or π/2 radians, so always check the mode before trusting a result.

sin(30)=0.5In degree mode, the sine of 30° is exactly one half.
cos(0)=1The cosine of zero is always 1, in any mode.
tan(45)=1In degree mode, tan(45°) equals 1.

Logarithms: log and ln

Logarithms answer the question "what power do I need to raise a base to in order to get this number?" The log key uses base 10, which is ideal for scientific notation, decibels and pH values. The ln key is the natural logarithm, base e, which appears constantly in growth, decay and compound interest formulas. Logarithms turn multiplication into addition, which is why they were historically used to simplify enormous calculations.

log(1000)=310 raised to the power 3 equals 1000.
ln(e)=1The natural log of e is always 1 by definition.

Powers and Roots

Exponents let you multiply a number by itself repeatedly. The x² key squares a value instantly, while the xʸ key (the caret ^ on your keyboard) raises any number to any power. The square root key √ does the reverse, finding the value that, when multiplied by itself, gives your number. These functions are essential for areas, volumes, compound interest and the Pythagorean theorem.

2^10=1024Two raised to the tenth power — the size of a kilobyte in bytes.
sqrt(144)=12The square root of 144.
sqrt(3^2 + 4^2)=5The Pythagorean theorem: a 3-4-5 right triangle.

Factorial and Reciprocal

The factorial key n! multiplies a whole number by every positive integer below it, which is the backbone of permutations, combinations and probability. The reciprocal key 1/x flips a number into one divided by itself, useful for rates, resistances in parallel circuits, and unit conversions.

5!=1205 × 4 × 3 × 2 × 1 — the number of ways to order five items.
1/4=0.25The reciprocal of 4.

Constants: π and e

Two mathematical constants are built in to full precision. π (pi, roughly 3.14159) is the ratio of a circle's circumference to its diameter and appears in every formula involving circles, spheres and waves. e (Euler's number, roughly 2.71828) is the base of natural growth and the natural logarithm. Tap either key to insert the exact value into your expression.

2 × π × 5=31.4159265The circumference of a circle with radius 5.

Combining Functions and Keyboard Shortcuts

The real power of a scientific calculator comes from combining functions in a single expression while the parser respects the correct order of operations. You can nest functions inside parentheses, raise results to powers, and chain everything together. On the keyboard, type the letters s, c and t for sin, cos and tan, q for square root, p for pi, g for log and n for ln. Enter computes, Backspace deletes a whole function token, and Escape clears the display. With a little practice you can enter complex expressions without ever lifting your hands from the keys. Try the examples above to see how each function behaves, then build your own.