Scientific Calculator

Type a complete mathematical expression or build one with the keypad. Press Enter or the equals key to calculate it.

Use parentheses whenever the intended grouping may be unclear. Select DEG or RAD before evaluating an angle-dependent expression.

The 2nd control changes the trigonometric keys to inverse functions and exposes additional logarithm, exponential, root, and power controls.

Ans inserts the latest successful numeric result from the current page session.

The keypad covers the most common arithmetic, trigonometric, logarithmic, exponential, power, root, factorial, constant, and percentage operations.

Additional functions can be entered directly, including hyperbolic functions, absolute value, floor, ceiling, decimal rounding, custom roots and logarithm bases, minimum, and maximum.

Function names require parentheses. Write sin(30), sqrt(81), log(8,2), or round(1/3,4), rather than leaving the argument ungrouped.

The parser follows explicit precedence rather than reading strictly from left to right.

Powers associate from right to left, so 2^3^2 means 2^(3^2). Unary minus is applied after a power, so -2^2 is -4 while (-2)^2 is 4.

When in doubt, add parentheses. They make the intended structure visible and reduce avoidable entry errors.

The calculator recognises multiplication before a constant, function, or opening parenthesis. Examples include 2pi, 2sin(30), 3(4+5), and (2+1)(5-2).

Explicit multiplication remains the clearest option in a long expression. Write 2sin(30) whenever the compact notation could be misread.

A function still needs parentheses around its arguments, and adjacent digits are not treated as separate factors.

DEG treats direct trigonometric inputs as degrees and returns inverse-trigonometric results in degrees. RAD uses radians for both.

For example, sin(30) is 0.5 in DEG mode, while sin(pi/6) is 0.5 in RAD mode.

Changing the mode recalculates the current expression when one is present. It does not rewrite the numbers or insert an angle unit into the expression.

ln(x) is the natural logarithm. log(x) and log10(x) use base 10, while log2(x) uses base 2. A custom base can be supplied as log(value,base).

Use ^ or pow(x,y) for powers, sqrt(x) for square roots, cbrt(x) for cube roots, and root(x,n) for an nth root.

The calculator reports a clear domain error when an operation has no supported real-number result, rather than displaying NaN or silently switching to complex numbers.

Percent is a literal postfix operator: x% means x divided by 100. Therefore 15% equals 0.15 and 200*15% equals 30.

The expression 200+15% equals 200.15 because the calculator does not guess that the user intends a percentage increase.

Write 200*(1+15%) for a 15% increase, 200*(1-15%) for a 15% decrease, or use the dedicated Percentage Calculator for guided percentage problems.

Scientific notation can be typed with e, such as 6.022e23 or 1.5e-8. The e inside a number means a power of 10, while the separate constant e represents Euler’s number.

Ordinary results are formatted to useful significant digits. Very large results and non-zero values smaller than 0.000000001 are displayed in scientific notation.

Formatting does not turn the calculator into arbitrary-precision software. The stored calculation still uses finite double-precision arithmetic.

Real-number operations have mathematical input restrictions. The calculator checks those restrictions before returning a result.

It rejects division by zero, logarithms of non-positive values, square roots of negative values, inverse sine or cosine outside -1 to 1, invalid factorials, and other unsupported inputs.

Correcting the highlighted expression is safer than treating an undefined result as zero.

Enter evaluates the expression and Escape clears the expression and display. Standard editing keys continue to work inside the expression field.

Ans represents the exact numeric value from the latest successful calculation, not merely the rounded text shown on screen.

Clearing the display does not create a permanent history. Reloading or leaving the page removes the session result.

The evaluator tokenizes and parses an allowlisted mathematical grammar instead of passing the expression to eval().

Calculations run locally in the browser and are not uploaded, placed in the page URL, or permanently stored.

This tool is designed for practical real-number calculations. Use specialist software when a task requires exact symbolic results, complex numbers, matrices, graphing, units, uncertainty propagation, or arbitrary precision.