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Figure 1: Calculator Modes

Standard Mode

The Standard mode is useful for basic math operations like adding, subtracting, multiplying, and dividing, as well as for finding square roots, calculating percentages, and working with fractions. This is probably the mode that most people will feel comfortable with most of the time.

Figure 2: Using Standard Mode

Scientific Mode

Scientific mode expands on the Standard mode, giving you the additional functions you’d find on a typical scientific calculator. In addition to the Standard mode operators, it contains functions like log, modulo, exponent, trigonometric degrees, and SIN, COS, and TAN.

Figure 3: Using Scientific Mode

Programmer Mode

This mode is designed for programmers. It adds the ability to switch between different number systems—binary, decimal, hexadecimal, and octal. It also adds new operations for working with logic gates—Or, And, Xor, and Not—and bit shifting—Lsh, Rsh, RoR, and RoL.

Figure 4: Using Programmer Mode

Date Calculation Mode

The Date Calculation mode is a handy little tool that lets you calculate the difference between two specific dates. This is perfect for figuring out things like how many days old you are or how many days it is until your next vacation.

All you have to do is select the start and end date, and the calculator will determine the months, weeks, and days between the two.

Figure 5: Using Date calculation Mode

Converting Measurements

Ever come across a recipe and it calls for milliliters when you want fluid ounces or been shopping online, and all the prices are in Euros? Well, the calculator has you covered for those and quite a few more everyday conversions you might encounter. Some other conversions include temperature, speed (mph to km/h, knots, or Mach), weight and mass, and data storage, to name just a few.

Click the menu button and select a type of conversion from the list in the “Converter” section.

Figure 6: Converting Measurements

Calculator History

If you need to take a look at all the calculations you’ve made in your current session, they’re stored conveniently inside the calculator’s history. Calculator keeps the history stored even when you switch modes, but it is erased when you close the Calculator app.

Figure 7: Calculator History

Deleting the History

You can delete individual entries from your history or delete the entire history at once.

To delete an individual entry, right-click it and then click the “Delete” command. To delete the entire history, click the little trashcan icon at the bottom right of the pane.

Figure 8: Deleting the History

Keyboard Shortcuts

The Calculator app has keyboard shortcuts integrated into it to make things a bit easier for those of us that like to use hotkeys to get around the desktop. To start with, if you have a number pad on your keyboard, make sure NumLock is turned on and then you can use the pad to perform calculations.

Also, there are some other shortcuts you can use. You can find a full list of these shortcuts on the Microsoft Support Windows Keyboard Shortcuts page, but here are a few of the more generally useful ones:

· Alt+(1-4): Hold down Alt and press any number from one to four to switch to the different calculator modes.

· Delete: Clear the current input (this works like the CE key on the calculator)

· Esc: Clear all input (this works like the C key on the calculator)

· Ctrl+H: Turn history on and off.

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