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Free Online Scientific Calculator With Working Shown

Type a whole expression rather than pressing one key at a time, and the answer appears as you type. Brackets, powers, roots, logarithms and trigonometry in degrees or radians, with the order of operations done properly, a caret under any mistake, and your expression read back so you can check it.

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Free Online Scientific Calculator With Working Shown

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🧮 Scientific Calculator Type the whole sum · degrees or radians · the reading shown back

The sum runs in your browser. Nothing you type is sent anywhere.

Angles

Last answer —

🧮 The expression

Type the whole sum. Brackets, powers with ^, and sqrt(x), root(x,n), ln, log, sin and the rest.

Expression

Insert

Try one of these

The second one is where a good many online calculators give the wrong answer.

Answer

—

Exact, to 17 digits—

Scientific—

As a fraction—

Degrees & radians—

Recent sums, kept in this browser only. Press the arrow to load one back.

Nothing here yet Press Log to history on the Calculator tab to keep a sum here.

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How to Use the Scientific Calculator

Four steps, and the third is the one people skip.

Type the whole sum, not one key at a time Brackets, powers with a caret, and function names with brackets after them. The answer updates as you type, so there is no equals key to press.

Choose degrees or radians before any trigonometry This is the single most common cause of a wrong answer in trigonometry, and the setting sits at the top of the panel rather than buried in a menu.

Read the expression back Underneath the answer is how your expression was actually understood, with the brackets filled in. If that does not match what you meant, the answer will not either.

Check the other forms of the answer The same number as a fraction, in scientific notation, and to seventeen digits. A fraction is often the answer you actually wanted.

What to Know Before You Trust the Answer

Where calculators disagree with each other, and which answer is right.

Minus two squared is minus four, and many calculators get it wrong. In -2^2 the power is worked out first and the sign applied after, giving −4. A good number of online calculators give 4, because they treat the leading minus as part of the number. Both answers look plausible, which is what makes the mistake expensive. Press the second preset to see it.

Powers bind to the right, so 2^3^2 is 512. It means 2 raised to (3 squared), which is 2 to the ninth, not (2 cubed) squared. Working left to right gives 64 and is wrong. This is the standard convention in mathematics and in every programming language that has the operator.

This does not use the browser's eval, on purpose. Handing what you type to eval is the easy way to build a calculator and a bad idea twice over. It would run anything, not just arithmetic, and it reads ^ as a bitwise operation, so 2^3 would come out as 1. There is a real parser here, which is also why a mistake comes with a caret under the exact character.

Degrees and radians, and why cos(60) is exactly 0.5 here. Converting 60 degrees to radians involves pi, which cannot be held exactly, so the raw result is 0.5000000000000001. That last digit belongs to the conversion rather than to the answer, so in degrees the result is rounded at the fifteenth significant digit. In radians nothing is touched, because there you supplied the number yourself.

Multiplication can be left out, but only where it is unambiguous. 2(3+4), 3pi and 2sin(30) all work. Two numbers with a space between them do not: 2 3 is treated as a mistake rather than quietly becoming 6, because it is nearly always a typing slip and a silent answer would hide it.

Nothing is uploaded and it works offline. The whole calculator is the page you are reading. Load it once and it keeps working with the network off, and nothing you type leaves the tab.

Key Features & Capabilities

What it does, and what it deliberately does not.

Type the whole expression One line instead of a key sequence, so you can see your own question and fix it rather than restarting.

Mistakes get a caret A real parser means a real position, so the bad character is pointed at and named rather than reported as a syntax error.

The reading shown back Your expression with the implied brackets filled in, so the order of operations is visible instead of assumed.

Conventions done properly Powers bind to the right, the unary minus binds below the power, and trigonometry respects the degree setting.

The answer in four forms Plain, to seventeen digits, in scientific notation and as a fraction where one exists.

History and saved sums Keep an expression you use often and load it straight back. Both live in this browser only.

About the Scientific Calculator

A pocket calculator hides your question from you. You press a sequence of keys, a number appears, and there is no way to see what the machine thought you asked. That is fine for adding up a shopping list and it is the wrong tool for anything with brackets in it, because the one thing you need to check is exactly the thing you cannot see.

So this one works the other way round: you type the whole expression, it stays on the screen, and the answer updates underneath as you go. If you have put a bracket in the wrong place you can see the bracket. Underneath the answer the expression is also written back out with the implied brackets filled in, which turns the order of operations from something you have to trust into something you can read.

The conventions matter more than they sound. Minus two squared is minus four, because the power happens before the sign is applied, and a surprising number of calculators on the web give four instead. Two to the three to the two is five hundred and twelve, because powers group from the right. Neither of these is a matter of opinion, and both produce answers that look entirely reasonable when they are wrong, which is why they are worth stating rather than leaving to chance.

The last decision is about trigonometry. Almost every wrong trigonometric answer comes from working in radians while thinking in degrees, so the setting is at the top of the panel where you cannot miss it rather than inside a menu. And in degrees the answers to the ordinary angles come out clean: cosine of sixty is exactly a half, not a half with a one on the end of it, because that trailing digit comes from converting degrees to radians rather than from the question you asked.

Frequently Asked Questions

Order of operations, degrees, powers and the awkward cases.

Because the power is applied before the sign. The expression means the negative of two squared, which is minus four. If you want the square of negative two, write (-2)^2 and you get four. Several online calculators get this wrong, which is why it is one of the preset examples.

Two raised to the power of three squared, so two to the ninth, which is 512. Powers group from the right by convention in mathematics and in every programming language that has the operator. Reading it left to right would give 64 and is incorrect.

With the setting at the top of the panel. It applies to sine, cosine and tangent and to their inverses, and it is deliberately in plain sight because working in the wrong unit is the most common cause of a wrong trigonometric answer.

Before a bracket, a constant or a function, yes: 2(3+4), 3pi and 2sin(30) all work. Between two plain numbers, no, because 2 3 is almost always a typing mistake and turning it into 6 would hide that rather than tell you.

Square and other roots, powers, natural and base ten and base two logarithms, the six trigonometric functions and their inverses, hyperbolic functions, absolute value, rounding in three directions, factorial, modulo, and minimum and maximum with any number of arguments. The full list is under the expression box.

Because the answer is not a real number, and this calculator works in real numbers. An odd root of a negative number does have a real answer and that one does work: root(-8,3) gives minus two, which is correct and which many calculators refuse.

No. There is no server involved. The page does the arithmetic itself, so it keeps working offline and nothing you type is uploaded or stored anywhere except your own browser if you choose to save it.