Calculators

Scientific calculator

From everyday arithmetic to powers, roots and trigonometry.

How it works

Parentheses → powers → multiplication and division → addition and subtraction.

Use +, − (type -), *, /, ^ and parentheses. Functions: sqrt, sin, cos, tan, ln, log and abs. Constants: pi and e. Select DEG for degrees or RAD for radians. The default is RAD. Powers associate right to left; -2^2 means -(2^2).

How to use this tool

Choose DEG or RAD before entering a trigonometric expression. Type an expression or use the keypad, close any parentheses, and press Calculate or Enter. AC clears the expression; backspace removes the character before the cursor.

Worked example

In RAD mode, sqrt(81) + 2^3 is 9 + 8 = 17. In DEG mode, sin(30) = 0.5; in RAD mode use sin(pi/6) for the same result.

Limits of this tool

Use explicit multiplication: 2*pi, not 2pi. Division by zero, invalid square roots and non-finite results are rejected. Tangent rejects odd multiples of 90° (or π/2 radians) within a fixed tolerance of 4 × machine epsilon × period: about 1.6e-13° or 2.8e-15 radians. Ordinary nearby values remain valid, but results near poles and very large angles can lose accuracy.

Good to know

Results are computed with 64-bit floating-point numbers. Very large or tiny values can lose precision; the display rounds only after calculation. Non-finite results are rejected.

Everything runs on your device. No inputs are sent to a server.

Scientific calculator

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