CalcKitHow to Use the Scientific Calculator
A scientific calculator goes far beyond plus and minus: it handles trigonometry (sin, cos, tan), logarithms, square roots, powers and π — the tools you need for school maths, engineering estimates and science homework. This one runs entirely in your browser, works with mouse, touch or keyboard, and needs no app install.
Type an expression or tap the keys, then press =. The DEG/RAD button switches trigonometric functions between degrees and radians — keep it on DEG for everyday geometry. Special keys: x² squares a number, xʸ raises to any power (type the exponent after it), √ is square root, and % divides by 100.
A few practical notes: multiplication must be explicit — write 2*(3+4), not 2(3+4). Use parentheses generously to control order of operations; the calculator follows standard precedence (powers before multiply/divide before add/subtract). The log key is base-10 logarithm, ln is the natural logarithm.
Because everything is computed locally on your device, results are instant and private — nothing you type ever leaves your browser. For everyday percentage or finance maths, our Percentage Calculator and Compound Interest Calculator are more specialised.