Frequently Asked Questions

A scientific calculator is a calculator that handles much more than basic arithmetic, including trigonometry, logarithms, exponents, roots, factorials, and scientific notation. It is the standard tool for maths, physics, chemistry, engineering, and statistics, where a plain four-function calculator falls short. This online version puts a full scientific keypad in your browser, so you get every one of those functions without buying any hardware. It runs on desktop, tablet, and phone, follows the correct order of operations, and keeps a history of your work. After the first visit it also works offline, and every calculation stays on your own device.

You should use a scientific calculator whenever a problem needs functions that a basic calculator does not have, such as sin, cos, log, powers, or roots. It also applies the correct order of operations, so a longer expression like 2 + 3 × 4^2 is worked out the right way without splitting it into steps. This tool adds a live preview so you can see the whole expression as you type, a history panel to reuse earlier results, and a degree or radian toggle for trigonometry. It is free, needs no sign-up, and runs entirely in your browser, so it is ready whenever you need it.

This scientific calculator is for students, teachers, engineers, scientists, and anyone who needs quick, accurate maths in the browser. Students use it for algebra, geometry, trigonometry, calculus, and statistics work. Physics, chemistry, and engineering users rely on it for scientific notation, constants, logarithms, and powers. Because it is free, needs no download, and works on any device, it also suits people who only need a scientific calculator now and then and do not want to install an app. The layout stays clear on phones and desktops alike, and your history and settings are saved for your next visit.

Type an expression the way you would write it on paper, for example 2 × (3 + 4)^2, then press Enter or tap the equals key to see the answer. Use the function keys for sin, cos, log, roots, powers, and more, and watch the live preview update as you go. Turn on the DEG or RAD toggle to choose the angle unit for trigonometry, and use the SCI toggle to show results in scientific notation. Open the History panel to reuse or copy earlier results. You can also type with your keyboard, edit the expression like normal text, and press Escape to clear everything.

Yes. It is completely free, with no sign-up, no account, and no usage limits. It runs entirely in your browser, so there is nothing to buy, install, or unlock. You can use every function as often as you like, on as many devices as you like. Just open the page and start calculating.

No. This is a web-based scientific calculator, so it opens straight in your browser with nothing to download or install. It works in Chrome, Edge, Firefox, Safari, and other modern browsers on any operating system. If you would like quicker access, you can add it to your home screen or bookmark it, and after your first visit it is cached so it keeps working offline. That makes it a lightweight alternative to a calculator app, without taking up storage on your device.

Yes. It is privacy friendly because every calculation runs on your own device and nothing you type is sent to a server. There are no accounts to create and no personal details to enter, so there is nothing to leak. Your history and settings are stored only in your own browser, and you can clear them at any time. The site loads over a secure HTTPS connection. Because the calculator works fully offline after the first visit, you can even use it with no network at all, which keeps your working completely on your device.

Yes. It follows the standard order of operations, evaluates nested parentheses correctly, and tidies up the small rounding errors that come from floating-point maths, so results are accurate and easy to read. Functions like trigonometry, logarithms, powers, roots, and factorials use well-tested formulas. For everyday study, homework, and professional work the precision is more than enough. Because it is a numeric calculator, it returns a single decimal value rather than an exact fraction or symbolic form, and you can round that value to as many places as you need.

Yes. After your first visit the calculator is saved to your browser cache as a progressive web app, so it keeps working with no internet connection. That is handy on a plane, in a tunnel, in a basement lab, or anywhere the signal drops. Because it runs offline, your calculations never depend on a server and never leave your device. To make offline use even smoother, add it to your home screen so it opens like an installed app. The next time you are without a connection, it will still load instantly and behave exactly as it does online.

Yes. The layout is fully responsive, so the keypad and display resize to fit phones, tablets, and desktops. Buttons stay large enough to tap comfortably, and the display keeps long expressions readable. You can add the calculator to your home screen to open it like an app, and it works offline after the first visit, so you do not need a signal. On a phone you get the same functions as on a computer, including trigonometry, logarithms, powers, roots, history, and the degree or radian toggle. It is a practical replacement for a handheld scientific calculator when you are on the move.

Yes. You can bookmark the page like any website, or install it to your home screen as a progressive web app. On Android, open the browser menu and choose Add to Home screen or Install app. On iPhone or iPad, tap the Share button in Safari and choose Add to Home Screen. Once added, it opens in its own window without browser bars and launches like a normal app. Because it is cached, it also works offline, so it is always one tap away. Bookmarking is a quicker option if you only want a saved link rather than an app-style shortcut.

Yes. You can type numbers and operators directly, press Enter to evaluate, and press Escape to clear. Use the ^ key for powers, brackets for grouping, and the arrow keys, Backspace, and Delete to edit your expression just like a text box. The on-screen keys highlight as you type, so you can see what is being entered. Keyboard support makes long expressions much faster than tapping, especially on a laptop or desktop. Common shortcuts such as select-all, copy, paste, and undo all work too, so entering and fixing calculations feels natural and quick.

Yes. The expression field behaves like a normal text box, so you can select text, copy it, and paste numbers or expressions in from other apps. Standard keyboard shortcuts work: Ctrl+C or Cmd+C to copy, Ctrl+V or Cmd+V to paste, and Ctrl+Z or Cmd+Z to undo, with redo available too. There is also a dedicated copy button to grab the result in one click, which is useful when you want to move an answer into a document, spreadsheet, or message. Because button presses join the same undo history as typing, you can step back through your changes without losing your place.

To enter a power, use the xʸ key or type the ^ symbol, for example 2^10 for two to the tenth power. For quick squares and cubes, use the x² and x³ keys, which add the exponent for you. To enter powers of ten, use the ×10ⁿ key and then type the exponent, for example 3 ×10^8. You can raise any number to any power, including decimals and negatives, such as 2^0.5 for a square root or 5^-2 for one over twenty-five. Wrap the base or the exponent in brackets when you need to control the order, for example (1 + 2)^3.

To find a square root, use the √ key or type √( and then the number, for example √(144) for 12. For a cube root, use the ∛ key, for example ∛(27) for 3. For any other root, use the ⁿ√ key, which enters nthRoot, and give the number and the root, for example nthRoot(32, 5) for 2. You can also use fractional powers, since a root is just a power below one: 32^(1/5) gives the same answer as the fifth root of 32. Brackets keep everything grouped, so the whole value inside is rooted.

Use the log key for base-10 logarithms and the ln key for natural logarithms (base e), for example log(1000) is 3 and ln(e) is 1. For a logarithm in any other base, type log with the value and the base together, for example log(8, 2) is 3 because two cubed is eight. Logarithms are useful in science, engineering, and finance for handling growth, decay, sound levels, and pH. You can combine them with other functions and brackets in one expression, and the live preview shows the whole thing as you build it, so it is easy to check before you press Enter.

Use the sin, cos, and tan keys for the main trigonometric functions, for example sin(30). Use asin, acos, and atan for the inverse functions when you know a ratio and want the angle back. For hyperbolic functions, use sinh, cosh, and tanh. Before you start, set the angle unit with the DEG or RAD toggle above the display, since sin(30) in degrees is very different from sin(30) in radians. You can nest functions and mix them with powers, roots, and brackets in a single expression. This covers the trigonometry needed for geometry, physics, and most engineering coursework, all from one keypad.

Tap the DEG or RAD toggle just above the display to switch the angle unit at any time. In DEG mode the trigonometric functions treat inputs as degrees, so sin(90) is 1. In RAD mode they treat inputs as radians, so sin(π/2) is 1. Choose the unit your problem uses before evaluating, because the same expression gives different answers in each mode. Geometry problems often use degrees, while calculus and physics usually use radians. Your choice is saved for your next visit, so you do not have to set it again each time, and the current mode is always shown on the toggle.

To calculate a factorial, type the number and then the n! key, or type an exclamation mark, for example 5! gives 120. A factorial multiplies a whole number by every whole number below it down to one, so 5! is 5 × 4 × 3 × 2 × 1. Factorials appear often in probability, permutations, and combinations. Keep in mind that they grow very quickly, so large values like 100! produce extremely big numbers, which the calculator can show in scientific notation using the SCI toggle. Factorials are only defined for non-negative whole numbers, so a decimal or negative input will not return a valid result.

Type the percentage as part of an operation and the calculator works it out in context. For a percentage of a number, use multiplication, for example 200 × 15% gives 30. To add a percentage, use 200 + 15% to get 230, and to subtract one use 200 - 15% to get 170, which is handy for tips, discounts, and tax. The % key needs an operation next to it, so use it together with ×, +, or - rather than on its own. This makes everyday percentage maths quick without converting to decimals first, and the live preview shows exactly how your expression is being read.

To enter a number in scientific notation, type the coefficient, press the ×10ⁿ key, and then the exponent, for example 6.022 ×10^23. Turn on the SCI toggle and results are shown in scientific notation too, which is ideal for very large or very small values. Engineering notation is a close relative that keeps the exponent as a multiple of three, so it lines up with units like kilo, mega, milli, and micro. You can enter engineering-style values the same way by choosing exponents such as 10^3, 10^6, or 10^-3, for example 4.7 ×10^3 for 4700. This keeps results easy to read for electronics and engineering work.

Yes. It follows the standard order of operations, often remembered as PEMDAS or BODMAS, so it handles brackets, then exponents, then multiplication and division, then addition and subtraction. That means 2 + 3 × 4 gives 14, not 20, and you do not have to enter the steps separately. Use parentheses to group parts of an expression and control the order yourself, for example (2 + 3) × 4 gives 20. Brackets can be nested as deeply as you need, and the calculator checks that they are balanced. The live preview shows the full expression as you type, so mistakes in grouping are easy to spot before you evaluate.

Yes. Tap the π key to insert pi (about 3.14159) and the e key to insert the constant e (about 2.71828), the base of natural logarithms. You can use them anywhere in an expression, for example 2 × π × 5 for the circumference of a circle with radius 5, or e^2 for e squared. The calculator uses their full precision internally, so you get accurate results rather than rounded shortcuts. Both constants combine with every other function, so you can write things like sin(π/6) or ln(e^3). Using the keys is more reliable than typing your own rounded values, and it keeps expressions short and clear.

For a remainder, use the mod key or type mod between two numbers, for example 17 mod 5 gives 2. For absolute value, use the |x| key, which enters abs, for example abs(-8) gives 8. For a random number, use the rand key, which inserts random() and returns a decimal between 0 and 1 each time it is evaluated. You can scale a random number to any range by multiplying, for example random() × 100 for a value between 0 and 100. There are also floor, ceil, and round keys for controlling whole numbers, which pair well with random values when you need whole results.

Yes. Every result is saved to the History panel, which you can open from the toolbar to look back at earlier calculations. Tap any entry to load its expression and result back into the calculator, so you can reuse or build on previous work without retyping. There is also a copy option on each entry for moving a result into another app. To clear everything, use the Clear button in the History panel, which removes all saved entries. Your history is stored only in your own browser, so it stays private to your device, and clearing it cannot be undone, so remove entries only when you are sure.

Use the memory keys to store a number and reuse it later without writing it down. MS stores the current value in memory, and MR recalls it into your expression whenever you need it. M+ adds the current value to whatever is already in memory, and M− subtracts from it, which is handy for keeping a running total. MC clears the memory. A small M badge appears near the display while a value is held, so you always know memory is in use. The stored value stays only in your own browser and is separate from the History panel, which keeps a full list of your past results.

It supports the full range of functions expected from a scientific calculator. That includes trigonometric functions (sin, cos, tan and their inverses, plus the hyperbolic sinh, cosh, and tanh), base-10 and natural logarithms, powers and exponents, squares and cubes, square, cube, and nth roots, and factorials. It also handles absolute value, modulo for remainders, floor, ceil, and round for whole numbers, random numbers, percentages, and the constants pi and e. You can combine any of these with brackets in a single expression, and the calculator applies the correct order of operations. Scientific notation input and display are supported too, using the ×10ⁿ key and the SCI toggle.

Yes. It is well suited to student work because it covers the functions used across most school and college maths, from algebra and geometry to trigonometry, logarithms, and basic statistics. The live preview helps you see and check a full expression before evaluating, which is a good habit for learning. The history panel lets you review your steps, and the degree or radian toggle avoids common trigonometry mistakes. It is free, needs no download, and works on a phone or laptop, so it is easy to use for homework at home or in the library. For a graded exam, always confirm your school allows an online calculator first.

Yes. It handles the maths these subjects rely on, including scientific notation for very large or very small quantities, logarithms for pH and decibels, powers and roots for formulas, and trigonometry for vectors and waves. The constants pi and e are one tap away, and the SCI toggle keeps results readable when numbers span many orders of magnitude. You can build a long expression with nested brackets in one line and let the calculator apply the correct order of operations. Because it works offline and on any device, it is convenient in a lab, a lecture, or at your desk. Always check the units of your inputs before you evaluate.

Yes, for the numeric parts of these subjects. In algebra you can evaluate expressions, powers, and roots and check your working. In calculus you can compute values of functions, use radians for trigonometry, and work with e and natural logarithms. For statistics you can calculate factorials for permutations and combinations, along with percentages and general arithmetic. Keep in mind this is a numeric scientific calculator, not a computer algebra system, so it returns numeric answers rather than simplifying symbols, solving equations, or plotting graphs. For step-by-step algebra or graphing you would need a dedicated tool, but for evaluating and checking numbers this calculator is fast and reliable.

Yes for homework and college study, and often for exams, but with one check. For everyday homework and coursework it covers the functions in most syllabuses, works on any device, and keeps a history so you can review your steps. For a timed or graded exam, always confirm that your school, college, or exam board allows an online or on-screen calculator, because many require a specific approved handheld model and do not permit web tools or phones. When an online calculator is allowed, this one works offline and needs no sign-up. When it is not, use it for practice and revision beforehand instead.

It depends on what you need, but this calculator is built specifically for scientific work in the browser. Compared with the Google search box calculator, it adds a full always-visible keypad, a saved history you can reuse, a clear degree or radian toggle, and offline use, which the search box does not offer. Compared with the Windows Calculator app, it needs no installation and runs on any device, including phones, Macs, and Chromebooks, while offering the same core scientific functions. The Windows app has its own extras like unit conversion and multiple modes. For fast, focused scientific calculations that you can open anywhere and use offline, this tool is a strong choice.

A scientific calculator does everything a basic calculator does and much more. A basic, or four-function, calculator only adds, subtracts, multiplies, and divides, and it usually works left to right without following the order of operations. A scientific calculator adds trigonometry, logarithms, exponents, roots, factorials, brackets, and scientific notation, and it applies the correct order of operations automatically. That makes it the right tool for maths, science, and engineering, where formulas need more than simple arithmetic. This online version gives you all of the scientific features for free in your browser, so you do not need to switch tools when a problem becomes more advanced.

A scientific calculator evaluates expressions and functions and returns a single numeric answer, while a graphing calculator can also plot those functions as curves on a coordinate grid. Graphing models usually add larger screens, programming, and tools for exploring how a function behaves visually, which is why some courses require them. A scientific calculator focuses on fast, accurate computation of one result at a time, which covers the majority of homework and exam maths. This tool is a scientific calculator, so it is built for quick, precise answers rather than plotting graphs. If your course specifically needs graphs, use a dedicated graphing tool alongside it.

For most purposes, yes. An online scientific calculator like this one offers the same core functions as a handheld model, plus a larger display, a saved history, easy copy and paste, and a live preview of your expression. It updates instantly, needs no batteries, and works on any device you already own, and after the first visit it works offline too. A handheld calculator has the advantage of being a dedicated, distraction-free device, which is why many exams require an approved physical model. So for study, homework, and professional work an online tool is an excellent everyday choice, while a physical calculator may still be needed in specific exam settings.

Not exactly - a TI-84 is a graphing calculator. It includes every function a scientific calculator has, such as trigonometry, logarithms, powers, and roots, and adds a large screen for plotting graphs, running programs, and working with statistics visually. This online tool is a scientific calculator: it covers the same computational functions the TI-84 uses, without the graphing screen, and runs free in your browser. If your class or exam only requires a scientific calculator rather than a graphing model, this covers that need.

Handheld scientific calculators from Casio, Texas Instruments, and Sharp typically cost from about $10 to $30, while graphing models such as the TI-84 usually run $80 to $150. This online scientific calculator is completely free - every function is available with no purchase, subscription, or sign-up, so there is no cost at all to start calculating.

Enter a fraction as a division: type 3 ÷ 4 (or 3/4) to get 0.75. When a fraction is part of a longer expression, wrap it in parentheses so the order of operations stays correct, for example (1/2) + (1/3). This calculator works with decimals rather than simplified fractions, so an answer like 5/6 is shown as 0.8333… - the same way most scientific calculators handle fractions unless they have a dedicated fraction mode.