How do I switch between degrees and radians?

Tap the DEG / RAD badge in the top-right of the display to toggle the angle mode. All trig functions (sin, cos, tan) respect the current setting.

What is the difference between ln and log?

ln is the natural logarithm (base e, where e ≈ 2.71828). log is the base-10 logarithm. For example, ln(e) = 1 and log(1000) = 3.

How do I compute x to the power of y?

Enter the base, press the x^y key, enter the exponent, then press =. For example, 2 x^y 10 = gives 1024.

What is the maximum factorial I can compute?

Factorials work for non-negative integers up to about 170 before the result overflows to infinity.

Does the scientific calculator support RPN?

Yes. Toggle RPN mode with the button in the top-right of the display. Every scientific function works in RPN — unary operations act on the top of the stack, and binary operations consume two operands.

Scientific Calculator

Everything from Basic mode plus the operations needed for trigonometry, logarithms, exponents, factorials, and the constants π and e. Toggle between degrees and radians for trig, and switch to Reverse Polish Notation if you prefer a stack-based workflow.

How to use it

Trig functions (sin, cos, tan) operate on the displayed value. The DEG / RAD badge in the top-right of the display toggles the angle mode — tap it to switch.
Logarithms: ln is the natural log (base e); log is base 10.
Powers and roots: x² squares the displayed value. x^y takes two operands — enter the base, press x^y, enter the exponent, then =. √ takes the square root of the displayed value.
Reciprocal: 1/x flips the displayed value (returns Error for 0).
Factorial: n! works for non-negative integers up to about 170 before overflowing to infinity.
Constants: π enters 3.14159…; e enters 2.71828…

Function reference

sin(x), cos(x), tan(x) — trigonometric functions, DEG/RAD aware
ln(x) — natural logarithm
log(x) — base-10 logarithm
√(x) — square root
x² — square
x^y — general exponentiation
1/x — reciprocal
n! — factorial
π, e — mathematical constants

Worked examples

sin(30°) in DEG mode → 0.5
cos(π/4) in RAD mode → 0.70710…
ln(e) → 1
log(1000) → 3
√2 → 1.41421…
2^10 using x^y → 1024
5! → 120
1/3 using 1/x on 3 → 0.33333…

Degrees vs. radians

Trig functions take an angle as input. In DEG mode the input is interpreted in degrees (a full circle is 360); in RAD mode it's radians (a full circle is 2π ≈ 6.283). Most physics and calculus uses radians; most everyday geometry uses degrees. The toggle persists for the duration of your session — check the badge before computing if you want to be sure.

RPN mode

Reverse Polish Notation is a stack-based entry style where you push operands first, then apply the operator. The toggle is in the top-right of the display.

To compute (2 + 3) × 4 in RPN: enter 2, press Enter, enter 3, press + (now the stack has 5), enter 4, press × → 20. No parentheses needed — the stack remembers intermediate results.

Keyboard shortcuts

0–9, ., +, -, *, / — digits and operators
Enter or = — evaluate
Backspace — delete the last digit
C — clear; Escape twice — all-clear
B, S, G, F — switch calculators