Scientific Calculator
A fully functional scientific calculator with trigonometric, logarithmic, and advanced math functions.
A full-featured scientific calculator for trigonometric, logarithmic, exponential, and factorial calculations, with support for both degree and radian angle modes.
How Scientific Calculator Works
The calculator builds up an expression as you tap or type, converting display symbols like ×, ÷, and − into standard operators, then evaluates the whole expression at once following normal order of operations — so parentheses and exponents are respected exactly the way they would be on a physical scientific calculator.
Trigonometric functions respect the Degrees/Radians toggle: when Degrees mode is on, an angle you enter into sin, cos, or tan is converted to radians internally before the function is applied, and inverse functions (asin, acos, atan) convert their radian result back to degrees for display.
The factorial key (n!) multiplies every integer from 2 up to your chosen number (capped at 170, beyond which the result overflows JavaScript's numeric range), and the percent key divides the current displayed value by 100.
See It In Action
Who Uses Scientific Calculator and Why
- Working through a trigonometry or precalculus homework set that mixes sin/cos/tan with square roots and exponents in one expression.
- Quickly checking a physics problem that needs an angle converted between degrees and radians mid-calculation.
- Computing a factorial for a combinatorics problem, up to the 170! ceiling this calculator supports.
- Evaluating a multi-step formula in one pass instead of solving it piece by piece on paper.
Mistakes to Avoid
- Leaving the calculator in Degrees mode while a problem expects Radians (or vice versa) — the same input to sin(), cos(), or tan() gives a completely different result depending on which mode is active.
- Typing an expression with unmatched or missing parentheses, which produces an Error instead of a wrong-but-plausible answer.
- Expecting a factorial above 170! to compute — the result exceeds JavaScript's precise numeric range, so the calculator stops there rather than returning an inaccurate huge number.
Tips for Best Results
- Check the Degrees/Radians toggle before running any trig function — it's the single most common source of a wrong answer on this calculator.
- Use parentheses generously in a combined expression like 5**2+sqrt(16) so the order of operations matches what you intend, even where PEMDAS would technically get it right anyway.
Fixing Common Problems
My trig function result doesn't match my textbook's answer. — Check the Degrees/Radians toggle first — the same numeric input to sin, cos, or tan produces a different result in each mode, and this is the most common cause of mismatched answers.
I got 'Error' instead of a number. — Look for an unmatched parenthesis or an invalid operation, such as a square root of a negative number or division by zero — the calculator can't evaluate a malformed or undefined expression.
Terms Explained
Order of operations (PEMDAS): The standard rule for evaluating a math expression: parentheses first, then exponents, then multiplication/division, then addition/subtraction.
Radian: A unit of angle measurement where a full circle equals 2π, used as the internal unit for trig functions regardless of which display mode is selected.