Scientific Calculator

A full scientific calculator, right in the browser — trigonometric functions, logarithms, exponents, factorials, and standard arithmetic, all accessible from an on-screen keypad or your physical keyboard.

How to Use the Scientific Calculator

Click the on-screen buttons, or type directly using your keyboard — number keys, the standard operator symbols (+, −, ×, ÷), parentheses, Enter or = to calculate, Backspace to delete the last character, and Escape to clear the entire expression. The screen shows your expression as you build it, and pressing = evaluates the complete calculation at once, in the correct mathematical order of operations.

An Important Detail: This Calculator Operates in Radians, Not Degrees

This is worth understanding clearly before using any trigonometric function, since it’s a common point of confusion coming from other calculators. The sin, cos, tan, and their inverse functions (asin, acos, atan) all operate in radians, not degrees — there is no degree mode toggle on this calculator, unlike many physical scientific calculators that let you switch between the two. This means entering sin(90) here calculates the sine of 90 radians, not 90 degrees, which will produce a very different (and likely unexpected) result compared to a calculator set to degree mode. If you need to work in degrees, convert your angle to radians first by multiplying by π ÷ 180 before entering it into a trig function — for example, to find the sine of 90 degrees, you’d enter sin(90 × π ÷ 180), or more directly, sin(π ÷ 2), since 90 degrees equals exactly π/2 radians.

Available Functions at a Glance

Trigonometric: sin, cos, tan and their inverses (asin, acos, atan) — all in radians
Logarithmic: ln (natural log) and log (base-10 log)
Powers and roots: x² (square), x^y (any power), √ (square root)
Other functions: 1/x (reciprocal), n! (factorial), % (percentage), ± (sign toggle)
Constants: π (pi) and e (Euler’s number)
Memory: Ans recalls the result of your last calculation, letting you chain calculations together without retyping a previous result

Using Ans to Chain Calculations Together

After pressing = to get a result, that result is stored and can be recalled by pressing the Ans button — useful for building a multi-step calculation without needing to retype a lengthy intermediate result manually. For example, after calculating 15 × 4, pressing Ans and then continuing with + 10 uses that 60 directly in the next step, reducing both typing and the risk of a transcription error when working through a longer sequence of related calculations.

Factorial and Its Practical Limit

The factorial function (n!) multiplies a number by every positive integer below it down to 1 — useful in probability, combinatorics, and statistics. This calculator’s factorial function is limited to non-negative integers up to 170, since factorial values grow so explosively fast that 171! and beyond exceed what standard number precision can represent accurately — entering a value outside this range returns an error rather than a meaningless or incorrectly rounded result.

For Everyday Arithmetic Without the Scientific Functions

If you don’t need trigonometry, logarithms, or the other scientific functions and just want straightforward arithmetic — addition, subtraction, multiplication, division, and percentages — the Basic Calculator offers a simpler, more familiar four-function keypad layout without the additional scientific buttons this calculator includes.

Working Through Specific Formula-Based Calculations Instead

This calculator is a general-purpose computation tool — it doesn’t know what a specific formula is for, it just evaluates whatever expression you type. If you’re working through a specific, named calculation instead — the Pythagorean theorem, quadratic formula, or a statistics calculation, for instance — the dedicated calculators for those specific formulas on this site guide you through the correct inputs directly, rather than requiring you to construct and type the underlying formula manually here. The Quadratic Formula Calculator, Pythagorean Theorem Calculator, and Exponent Calculator are a few examples of calculators built around a specific formula rather than free-form expression entry.

Statistics and Probability Calculations

While this calculator can evaluate individual factorial values manually, calculations that combine several factorials together — like permutations and combinations — are more directly handled by a purpose-built tool. The Permutation and Combination Calculator computes those combined values directly from n and r inputs, rather than requiring you to type out and combine multiple factorial expressions manually here.

Converting Between Number Bases

This scientific calculator works exclusively in standard base-10 arithmetic. If you need to perform calculations in binary or hexadecimal instead, the Binary Calculator and Hex Calculator handle arithmetic directly in those other number systems, which this scientific keypad doesn’t support.

Frequently Asked Questions

Does this calculator work in degrees or radians?

Radians only — there is no degree mode toggle. To calculate a trigonometric function using a degree measurement, convert the angle to radians first by multiplying by π ÷ 180, or enter the equivalent radian value directly (for example, π/2 for 90 degrees).

How do I use a previous result in a new calculation?

Press the Ans button after getting a result to recall that value, then continue building your next calculation using it directly — useful for chaining multi-step calculations without retyping a lengthy intermediate result.

What is the largest factorial this calculator can compute?

170!. Values beyond that exceed what standard number precision can represent accurately, so the calculator returns an error rather than an incorrect or misleadingly rounded result for larger inputs.

Can I use my keyboard instead of clicking the on-screen buttons?

Yes — number keys, standard operator symbols, parentheses, Enter or = to calculate, Backspace to delete, and Escape to clear are all supported directly from a physical keyboard.

What is the difference between this calculator and the Basic Calculator?

This scientific calculator includes trigonometric, logarithmic, exponent, and factorial functions in addition to standard arithmetic. The Basic Calculator offers a simpler four-function keypad — addition, subtraction, multiplication, division, and percentage — without the additional scientific functions.