Calc

Expressions

Standard math notation with + - * / % ^ (or **), parentheses, factorial !, and implicit multiplication: 2pi, 3(4+1), and 2x^2 all work. Numbers can be written as 1.5e-3, hex 0xff, or binary 0b1011. Large numbers may use digit separators, 1_000_000 or 1,000,000, and currency symbols $ £ € ¥ are ignored, so $1,000 + 10% works. Starting a line with an operator continues from the last result: +5 means _ + 5. Display an integer result in another base with hex(255), bin(10), or oct(8).

Percentages work the everyday way: 50% is 0.5, 15% of 80 is 12, and 120 + 10% adds 10 percent to give 132. With another operand, % is still the modulo operator: 10 % 3 is 1.

History References

_ or ans	previous result
__ and ___	second and third most recent results
Out[n]	result number n, e.g. Out[3] * 2

Click any previous input to load it back into the prompt; click any output to copy it. The arrow keys walk through your command history, and as you type, the most recent matching command is suggested inline; accept it with → (at the end of the line) or Tab.

Variables

Assign with =, e.g. rate = 0.21 then 1500 * rate. Type vars to list what you have defined. Variables and history persist between visits; reset wipes everything.

Functions & Constants

sin cos tan asin acos atan atan2	trigonometry; switch modes with deg / rad
sinh cosh tanh asinh acosh atanh	hyperbolic
sqrt cbrt root(x,n) exp ln log log2 log10	roots, exponentials, logarithms (log is base 10)
abs floor ceil round trunc sign mod hypot	rounding and magnitude
min max gcd lcm ncr npr fact gamma rand	combinatorics and utilities
sum mean median std	statistics over a list, e.g. mean(3, 5, 8); std is the sample standard deviation
pi tau e phi inf	constants

Plotting

plot(sin(x)) draws a graph inline; add a range with plot(x^2 - 3x, -5, 8). The expression is a function of x and can use your variables and history references.

Sharing

Click share below the terminal to copy a link that replays every calculation visible on screen, so variables and history references come out the same on the other end; use clear first if you only want to share what comes next. You can also craft a link by hand with ?q=, e.g. ?q=sqrt(2^10); separate multiple commands with a newline (%0A). The commands run in order when the page loads. Lines starting with # are comments; they are printed but not evaluated, which is handy for annotating a calculation before sharing it.

Commands

help quick reference; clear clear the screen (history is kept); reset erase history and variables; deg / rad set trig mode; vars list variables.

Privacy

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