Scientific Calculator

How to use Scientific Calculator

1. Type an expression with your keyboard, for example 2*(3+4)^2/sqrt(16), or tap the on-screen keys.
2. Choose Degrees or Radians before using sin, cos, tan and their inverses.
3. Press Enter or = to store the result in history, and use ans to refer to the last answer.
4. Click an item in the history to bring that expression back for editing.

What this calculator can do

A scientific calculator extends the basic four operations with the functions needed for school maths, science and engineering. Here you can combine them freely in one line: for instance sin(30)+log(1000)*2^3! evaluates powers and factorials first and then the rest. Constants pi and e are built in, and implicit multiplication works in common cases such as 2pi or 3(4+1).

Results are rounded to about twelve significant digits to hide tiny floating-point noise, such as 0.1+0.2 producing 0.30000000000000004. The display is long enough for most coursework, but it is not an arbitrary-precision tool.

Degrees, radians and logs

Angles can be measured in degrees (a full circle is 360) or radians (a full circle is 2 x pi). Calculators often give wrong-looking answers because the mode is wrong, so check the switch whenever sine, cosine or tangent are involved. Inverse functions return degrees in degree mode and radians otherwise.

The log button is the base-10 logarithm, which asks what power of 10 gives the number, so log(1000) is 3. The ln button is the natural logarithm with base e, so ln(e) is 1. Both require positive inputs.

Tips

• Use brackets generously when you are unsure about operator order.
• Factorial works on whole numbers from 0 to 170; larger values overflow.
• Press Esc to clear the input line quickly.
• Copy your history to keep a record of working for homework or notes.
• Check estimates by rounding: if sqrt(50) is not near 7, something is off.

Limits

This calculator works with real numbers only, so it will not return complex results. It does not support graphing, matrices, unit conversion or symbolic algebra. For exams, check that a calculator of this kind is allowed.

Why use this scientific calculator tool

• Real expression parser. Follows normal operator order and handles nested brackets, with clear messages for mistakes.
• Wide function set. sqrt, cbrt, sin, cos, tan, asin, acos, atan, log, ln, exp, abs, factorial and percent.
• Degrees and radians. Exact answers for common angles such as sin(30) = 0.5 or cos(90) = 0.
• Safe and private. Uses its own parser rather than running your text as code, and nothing leaves your browser.

Frequently asked questions

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