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With everything incredible that computers can do, it’s easy to forget about the good old calculator. The built-in Calculator app for Windows 10 is handy for running all sorts of calculations, especially when you know its tricks.
Let’s look at the best Windows calculator functions that you should know for crunching numbers.
How to Open the Calculator in Windows 10
You can open the calculator in any version of Windows by pressing the Windows key to open the Start menu, then typing calculator to search for it. Some keyboards also have a dedicated shortcut key for the calculator. If you use it often, right click on the Calculator app’s Taskbar icon and choose Pin to taskbar to keep it close by.
Windows 10 users have the modern Calculator, which is a Store app. The Windows 8.1 Calculator isn’t as full-featured as what Windows 10 has. And those on Windows 8 or Windows 7 will see the old-school calculator instead.
While we’ll focus on the Calculator app for Windows 10 here, many of the tips apply to the older versions as well.
1. Resize the Calculator
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If you’re used to the Windows 7 calculator, you might not have realized that the calculator in Windows 10 is fully resizable. Simply drag one of the edges to shrink or enlarge the calculator window, and all the controls will adjust dynamically with it.
This allows you to add more space between buttons if you use a touch screen, fit the calculator alongside other windows, or anything else you see fit.
2. Keep the Calculator Always on Top
If you’re calculating some numbers to enter on a webpage or another program, it’s frustrating to have the calculator disappear from view every time you click away from it. Thankfully, the Windows 10 calculator lets you keep it on top at all times to avoid this.
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First, use the slide-out menu on the left side to select the Standard calculator. You’ll then see an icon to the right of the name that looks like an arrow pointing at a small box. Click that to pin the calculator to your screen and it will stay on top permanently. You can drag it around or resize it as needed.
To turn this off, click the similar icon at the top-left of the calculator to return to normal operation.
3. Utilize the Calculator History
It’s easy to make a mistake when entering numbers into the calculator. The History feature lets you review recent calculations so you can recall numbers or catch errors.
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To access the history, resize the calculator app window horizontally far enough that you see the History section on the right side. If it’s too narrow, you can click the History icon at the top-right to show a slide-out panel, but this isn’t as convenient.
Once this page is open, you’ll see a running log of all past operations. Click one to recall it into the current calculation, or right-click and choose Copy to paste the number elsewhere.
Also on the right-click menu, choose Delete to erase a history entry. Selecting the Trash icon at the bottom-right will clear everything from this panel. The history doesn’t save between sessions, so you’ll lose this information when you close the app.
4. Recall Numbers Using Memory
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You might have never used the M buttons along the top of the calculator, but they’re pretty handy. These allow you to store values and recall them easily later.
Start by entering a value into the calculator, such as 3.1416 for Pi. Next, hit the MS (Memory store) button to put it into memory. Now, when you want to use that number again, click MR (Memory recall) to load it into the calculator.
You can use the M+ and M- buttons to quickly add to or subtract from the stored value. For example, say you have 10 stored in memory. If you enter 6 and press M+, the stored value becomes 16. Likewise, hitting M- with 6 entered will change the memory value of 10 to 4.
If you expand the calculator to show the History sidebar on the right, you can click the Memory header to view that value. In addition, you can store multiple values in memory to recall them easily. Hit MC to clear all values from memory. Like the history, these will disappear when you close the app too.
5. Work With Scientific Calculations
The Standard calculator is great for simple calculations, but you can do more advanced work if the standard calculator buttons aren’t enough. Just switch to the Scientific calculator using the left sidebar and you’ll have access to many more functions, including trigonometry and exponents.
Covering everything here is far beyond the scope of this guide, so take a look at the video below for more info on scientific calculator functions.
6. Get Help With Programming Work
There’s another great calculator mode hiding in the left sidebar: Programmer. This contains tools for performing calculations in binary (base 2), octal (base 8), and hexadecimal (base 16), which are common in computer science.
Of particular note here is the bit toggling keypad, which you can access by clicking the icon next to the traditional keypad. This provides you with up to 64 bits that you can click to toggle between 0 and 1. As you make changes, you’ll see the values in the various bases update at the top-left.
The default is QWORD, which is a 64-bit value. Click this to switch to DWORD (32-bit), WORD (16-bit), or BYTE (8-bit).
7. Perform Calculations on Dates
The last major calculator mode is Date Calculation. This lets you figure out the difference between two dates, as well as adding or subtracting a certain amount of time from a date.
You can use the difference function to, for instance, figure out how many days there are until a planned trip. Alternatively, you could see if a product you purchased is still within its six-month warranty.
8. Convert All Kinds of Units
Rounding out the functions of the Windows calculator are several unit conversion tools. These allow you to convert nearly any kind of measure, using several different units.
There are too many to mention them all by name, but here’s a quick list:
Currency
Volume
Length
Weight and Mass
Temperature
Energy
Area
Speed
Time
Power
Data (great for measuring true computer file sizes Hard Drive Size Explained: Why 1TB Is Only 931GB of Actual SpaceWhy does your PC only show 931GB when you have a 1TB drive? Here's the difference between advertised vs. actual hard drive space. Read More )
Pressure
Angle
Whether you’re looking to convert between US and metric units or just want to visualize data in another way, you’ll probably find what you’re interested in here.
9. Take Advantage of Keyboard Shortcuts
Like most Windows programs, the calculator is full of handy keyboard shortcuts to help you navigate more smoothly.
Here are a few of the most useful from the large pool of available shortcuts:
Alt + 1: Switch to Standard mode
Alt + 2: Switch to Scientific mode
Alt + 3: Switch to Programmer mode
Alt + 4: Switch to Date Calculation mode
Ctrl + M: Store in memory
Ctrl + R: Recall from memory
Ctrl + L: Clear memory
F9: Switch between positive and negative for the current value
@: Calculate square root
F3: Switch to DEG (Scientific mode only)
F4: Switch to RAD (Scientific mode only)
F5: Switch to GRAD (Scientific mode only)
10. Access the Classic Windows Calculator in Windows 10
While the Windows 10 Calculator is great, it lacks some features of the old Windows 7 calculator. Notably, it doesn’t have a statistics mode or support for worksheets (such as mortgage calculations)
If you want to get the old experience back, you can download the classic Windows calculator free from Winaero.
For most people, though, the modern version should suffice. Since it receives updates through the Microsoft Store, it could gain new features in the future. The old calculator app isn’t in active development anymore.
Windows Calculator Functions for Everyday Math
Now you know about all the great functionality waiting in the Windows 10 Calculator app. It packs tons of useful operations into one easy package, works offline, and is part of the OS to boot. Don’t forget about it next time you need to crunch some numbers.
For more interesting bits of Windows, check out the most underutilized Windows features The 10 Most Overlooked Windows 10 FeaturesWindows 10 has lots of features, but you may have overlooked some of them. Let's look at 10 Windows 10 features you don't want to miss! Read More . We’ve also highlighted cool online calculators that aren’t about math 5 Online Calculators for Everyone That Aren't About MathCalculators do more than math. These free online calculators can become key decision making tools for you. Read More .
Our math teachers used to warn us that we wouldn’t have a calculator everywhere we go. But now we have smartphones with us everywhere we go, with access to hundreds of calculator apps.
Since there are so many options, it can be hard to nail down the right one for your needs. Today we’re going to break down the best free calculator apps for Android.
1. Calculator (by Google)
This is your simplest, safest bet. Google offers a barebones, yet well-designed app that will handle basic math tasks, but not much else. It calculates in real time, so you don’t even have to reach for the equals button.
You can get some more complex functions by swiping in from the right side, but it’s still a rather limited set. The only other major feature is that you can tap on the top of the screen to reveal a three-dot menu that allows you to change decimals to fractions—and that’s about it. There’s no history or graphing.
It is totally free and has no ads, though. So it gets the job done (unless you’re trying to live Google-free).
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Download:Calculator by Google (Free)
2. Calculator ++
If the Google Calculator is a little too basic for you, try Calculator ++. This app has both a Simple and an Engineer mode. It supports a wide variety of functions, a history of everything you’ve calculated, and it can even create graphs.
One neat little feature is swipeable buttons. Swipe up on a button to activate the option on the top part, and swipe down to activate the option on the lower part. It’s also customizable, with several different theme options available. Along with a widget for your home screen, it includes a floating window mode.
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This app does contain ads, but they only display on side pages like History, not the main calculation page,. You can remove them for $4. Overall, it strikes a nice balance between simple and functional.
Download:Calculator ++ (Free)
3. ClevCalc
ClevCalc is actually a bunch of calculators all in one. Not only does it have the basics like a currency and unit converter, but it also has everything from a fuel cost calculator to an ovulation calculator.
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You can choose from several different themes all inspired by Material Design. Though the app does have ads, you can remove them via an in-app purchase.
Download:ClevCalc (Free)
4. Calculator (by TricolorCat)
Here’s a choice simply named Calculator. This one is best for folks who are super particular about their keyboard The 5 Best GIF Keyboards for Texting and Emojis on AndroidWhat's the best GIF keyboard for Android? These keyboards make it easy to add GIFs and emojis to anything you type. Read More , because it has three different layout styles: Standard, Stylish, and Ergonomic.
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It also features a ton of different color options and the option to add or remove the memory buttons. Other than that, you can change how decimals appear (1.5 or 1,5) and view your history by swiping down from the top. It’s super simple, but also more customizable than most basic calculator apps.
The app does have a banner ad along the bottom, but you can buy the Pro version to remove it.
Download:Calculator (Free) Download:Calculator Pro ($1.50)
5. CalcTastic Scientific Calculator
This app is for anyone who needs more scientific calculation options. It has a basic calculator too, but the emphasis is on the scientific portion. You can work on complex problems to your heart’s content, but it can’t graph anything.
It’s also nicely customizable, with some classic scientific calculator themes and a plain light theme. If you upgrade to the Pro version for $1, you get seven more themes, polar form complex numbers, landscape support, and a programmer calculator.
Download:Scientific Calculator (Free) Download:Scientific Calculator Pro ($1)
6. RealCalc Scientific Calculator
Another good scientific calculator is the popular RealCalc. It’s designed to look like the traditional hand-held scientific calculators you used in school.
RealCalc has all the standard scientific function you’ll need. It also supports history, memories, unit conversions, and constants. Binary, octal, and hexadecimal calculations work just fine too.
The app offers two calculator types, traditional and Reverse Polish Notation (RPN). When using the traditional type, make sure you put parentheses around parts of the equation to preserve calculation order. It’s different than the other calculators listed above—you can’t just type in the equation as it appears.
You can also choose from a number of display styles and formats to customize the look of the app.
The free version offers many useful features that may be enough for your purposes. If you want more features, like fractions, degrees/minutes/seconds, customizable conversions and constants, landscape mode, and a 12-digit display, you can purchase RealCalc Plus.
Download:RealCalc (Free) Download:RealCalc Plus ($3.49)
7. CALCU
This app finally brings a somewhat original name (even if it is just a shortened version of “calculator”). CALCU has both basic and scientific layouts, a bunch of slick themes, and even an option for adjusting the font.
It has swift little swiping animations, like swiping down to reveal the history or swiping up to reveal more scientific buttons. There’s a banner ad along the top that you can remove via a $2 in-app purchase.
Download:CALCU (Free)
8. One Calculator
One Calculator has a sleek aesthetic, including smooth transitions and animations with a great color scheme. It also has a matrix calculator, a converter, and a grapher.
Unfortunately, other themes cost $1.49 each, but that’s the price to pay for an otherwise ad-free calculator that covers all the bases: basic, scientific, and graphing. It’s so intuitive and fluid that you’ll love it right away.
Download: One Calculator (Free, in-app purchases available)
9. Desmos Graphing Calculator
For those who want a dedicated graphing calculator app, Desmos Graphing Calculator is for you. There’s not even a basic calculator interface here—it’s all about the graphs. The app makes it easy to program in and plot multiple functions, then use sliders to adjust them. You can even start with some of the app’s example graphs for some help.
If you want, you can make an account to sign in and sync your graphs. Best of all, there are no ads and no in-app purchases.
Download:Desmos Graphing Calculator (Free)
Which Is the Best Calculator for Android?
Each of these apps has its strengths and weaknesses, so it’s worth trying out a few before settling on which works the best for you. If you also use an iOS device, we’ve covered the top calculator apps for iPhone, iPad, and Apple Watch.
Currency Converter
Now that you’ve replaced the stock calculator app, why not check out some other great alternative Android apps 8 Stock Android Apps You Should Replace With These AlternativesUnhappy with the stock apps that come with stock Android? Here are excellent replacements for Messages, Phone, Gmail, Camera, and more. Read More ?