Scientific calculator
Answers you press = on show up here, and tapping one puts it back in the field.
This calculator evaluates a whole expression at once, respecting the usual order of operations: brackets, then powers, then multiplication and division, then addition and subtraction. It covers trigonometry in degrees or radians, natural and base-10 logarithms, roots, factorials, π and e, and reuses the previous answer through the Ans key.
How to use it
Two conventions are worth stating because calculators disagree about them. Here, −2² is −4: the power binds tighter than the minus sign, so it reads as −(2²). And 2^3^2 is 512, because powers group from the right, giving 2^(3^2). If you want the other reading, use brackets — that is what they are for.
Questions
Yes. 2π, 3(4+5) and (1+1)(2+2) all work and mean what they look like.
No. An expression with brackets still open is closed for you, so you see a live answer while you are still typing.
It divides by a hundred, so 50% is 0.5 and 200×10% is 20. It is not the remainder operator.
It uses double-precision floating point, the same as every browser and most pocket calculators, and trims the display so 0.1 + 0.2 reads as 0.3 rather than 0.30000000000000004.
Yes. The display is a real text field, so typing and Enter are enough; the pad is there for phones.