Scientific Calculator

This calculator covers 22 distinct operations, everything from basic arithmetic through trigonometry, logarithms, exponents, and factorials, all through the same simple two-field layout rather than a different tool for each one.

1. Pick an operation from the list, such as sine, logarithm, or square root.
2. Enter your number in the first field. Operations that need two values, like power or divide, also show a second field.
3. For trigonometric functions, confirm the Degrees or Radians setting matches how your angle is measured.
4. Read the result. When it works out to a simple fraction, the simplified fraction appears as a second result beneath the decimal.

Most everyday problems, and most physical protractor measurements, use degrees, where a full circle is 360 degrees. Radians measure the same angle by arc length instead, where a full circle is about 6.283 radians, or 2 pi. Calculus and most higher level math default to radians, since several trigonometric derivatives and identities only simplify cleanly in that unit.

This calculator's Degrees and Radians setting applies to every trigonometric function, sine, cosine, tangent, and their inverses, at once. Getting the setting wrong is one of the most common scientific calculator mistakes: a real angle of 45 degrees evaluated as 45 radians gives a completely different, and wrong, result. If a trig result looks obviously off, checking this setting first is usually the fastest fix.

The table below lists every trigonometric, logarithmic, and exponential operation this calculator supports, with a worked example for each. A negative number under a square or cube root returns a not a number result here, since this calculator works with real numbers only; the Complex Number Calculator handles square roots of negative numbers directly.

Factorial, Reciprocal, and Other Functions

A few operations in the list are not trigonometric, logarithmic, or exponential, and work a little differently. Factorials are also the basis of counting problems, which the Combinations and Permutations Calculator handles directly rather than a single A! value.

Every result also appears as a simplified fraction when one exists within a reasonable denominator, alongside the usual decimal. Divide 3 by 4 and the decimal result of 0.75 shows a fraction result of 3/4 right underneath it, useful for cooking measurements, shop class projects, or any homework that expects an answer in fraction form rather than decimal form.

Not every result has a clean fraction. An irrational result, like the square root of 2 or a value involving pi, has no exact fraction, so the fraction result reads Not a simple fraction in that case, and only the decimal is meaningful.

A scientific calculator and a graphing calculator solve different problems. This tool, like a real handheld scientific calculator, evaluates one expression at a time, trigonometry, logarithms, exponents, roots, and factorials, with an immediate numeric result. A graphing calculator plots functions on a coordinate grid and can solve systems of equations visually, a genuinely different kind of tool built for a different kind of problem.

If checking a trig value, converting a logarithm, or working out an exponent is the actual task, this calculator handles it directly in the browser, with no app to download and no account to create. Plotting a function, or a standardized test that requires an approved calculator model, calls for different, more specialized tools instead.

Because it runs entirely in the browser, it also works the same way on a phone or tablet as on a desktop, with no separate app store listing, no install size to worry about, and no login wall between opening the page and getting an answer.

Each function on this page also has its own dedicated calculator with deeper, focused content, useful when that single operation is specifically what is needed. For percentage work beyond a single A percent of B calculation, the Percentage Calculator covers percent change and percent difference too.

• Square Root Calculator
• Exponent and Power Calculator
• Logarithm Calculator
• Triangle Calculator
• Factorial Calculator