Scientific Calculator
Use the keypad below for trig functions (sin, cos, tan and their inverses), logarithms, powers, and roots - toggle between degrees and radians for angle-based calculations.
Last updated: September 22, 2026
Frequently asked questions
How do I switch between degrees and radians?
Use the "Degrees" / "Radians" toggle above the keypad. It affects sin, cos, tan (which read their input in the selected unit) and asin, acos, atan (which return their result in the selected unit) - it has no effect on non-trig operations like powers or logs.
What's the difference between log and ln?
log is base-10 logarithm (log₁₀), and ln is the natural logarithm (base e, Euler's number ≈2.71828). Tap "log(" or "ln(" followed by your number and a closing parenthesis, then "=" to evaluate.
How do I calculate a square root or a power?
Tap "sqrt(" for a square root, entering the number and closing parenthesis, e.g. sqrt(49) = 7. For a power, use "^", e.g. 2^10 = 1024; for a general root like a cube root, use a fractional exponent, e.g. 27^(1/3) = 3.
Is this the same as the graphing calculator?
No - this is a single-answer keypad calculator for evaluating one expression at a time (like a physical scientific calculator). The graphing calculator instead plots a function's curve across a range of x values. Use this one for a specific numeric answer, the grapher for visualizing how a function behaves.
Why does my calculation show "Error"?
Usually a typo in the expression - an unmatched parenthesis, a missing operator, or an unrecognized function name. Tap "C" to clear and re-enter the expression, checking that every function call like sin( has a matching closing parenthesis.
How is this different from the separate exponent and logarithm calculators?
The exponent and logarithm calculators are single-purpose deep-dive tools - each with its own dedicated result and explanation for one specific operation. This scientific calculator is the consolidated keypad experience for combining several operations (trig, logs, powers, roots) into one expression, closer to a physical calculator - use whichever fits what you're doing.
Can I use pi (π) or e in an expression?
Yes - type "pi" for π (≈3.14159) or "e" for Euler's number (≈2.71828) anywhere a number is expected, e.g. "2*pi" or "e^2".