Calculator Online

Use our online calculator to calculate anything on the go. We created this simple calculator to work online and on all devices, including mobile smartphones that you might use in school. You can use functions like addition, subtraction, multiplication, and division. We designed it with a modern look and added a full-screen mode option to keep you free from distractions.

How to Use the Calculator

1. Enter Numbers:
   Click or tap the number buttons (0-9) to enter the numbers you want to calculate. You can also use the decimal point button . to input fractional numbers.
2. Perform Calculations:
   • To add numbers, press the + button.
   • To subtract, press the - button.
   • For multiplication, use the × button.
   • For division, use the ÷ button.
3. Using Equals:
   Once you’ve entered the numbers and chosen an operation, press the = button to display the result.
4. Clear the Screen:
   Press the C button to reset the calculator and clear the display.
5. Using Decimals:
   For calculations involving fractions or decimal numbers, press the . button to include a decimal point.
6. Full-Screen Mode:
   To focus solely on your calculation, press the Full Screen button. This expands the calculator to fill your device’s screen.

Examples

1. Addition:
   To calculate 15 + 7:
   • Press 1, 5, +, 7, and =.
   • The result 22 will display.
2. Subtraction:
   To calculate 50 – 23:
   • Press 5, 0, -, 2, 3, and =.
   • The result 27 will display.
3. Multiplication:
   To calculate 6 × 8:
   • Press 6, ×, 8, and =.
   • The result 48 will display.
4. Division:
   To calculate 45 ÷ 9:
   • Press 4, 5, ÷, 9, and =.
   • The result 5 will display.
5. Decimal Calculation:
   To calculate 3.5 × 2:
   • Press 3, ., 5, ×, 2, and =.
   • The result 7.0 will display.

How to Solve Any Math Problem in Four Simple Steps

Math can be a very polarizing subject. Some people love it (generally because there’s always one “right” answer), and other people hate it (generally because there are so many formulas to remember). No matter which category you fall under, chances are that you’ve encountered a math problem that seems impossible to solve. Thankfully, due to the nature of mathematics, there are no unsolvable problems — only ones to which the solution is not immediately clear.

Step 1: Be sure you understand the problem.

Before attempting to solve any math problem, it’s essential that you understand what the question is asking. First read through the entire problem, without writing anything down. Next, re-read the problem, this time determining what information the problem provides and what information it’s asking you to provide. Organize the information obtained so that it makes sense to you. This organization may be a table, a list, or a sketch. There are no “wrong” methods of organization when it comes to math.

Step 2: Come up with a plan.

Now that you have all your information organized, it’s time to come up with a plan. Have you done problems like this one before? If it’s not clear, find a way to simplify the problem. Sometimes, this is as simple as reducing fractions, pulling out factors, or estimating. Other times, this may require writing the problem algebraically and then solving it with smaller numbers first. If it seems impossible to pull a simpler problem out of the problem, your best plan may be an educated guess — but be aware that guessing tends to be harder to check.

Step 3: Work through your plan.

Once you’ve come up with a plan and an equation to solve, it’s time to solve it. Math is formulaic, so if a problem looks similar to another problem you’ve done before, there’s a good chance that the system used to solve it is the same. Consider all the math concepts you have learned so far, and be sure that you’ve applied the relevant ones to your examination of the problem.

Step 4: Check your answer.

After you’ve done the work of solving the problem, it’s time to double-check. Does your answer make sense for the way the problem is worded? If it isn’t reasonable for the answer, revisit the steps of the problem to see where you went wrong. It could be that you used the wrong methods for solving, or it could be a simple arithmetic error. If possible, check the answer in the original problem itself. Does it fit? Adding the answer into the original problem may uncover an easier way to solve this type of problem, which will help you the next time you encounter one.

While not everyone thinks mathematically, everyone can learn to be an excellent mathematician. Math is all about pieces: If you learn what those pieces are and how they work together, you can solve any math problem — every time, and if you’re having a hard time, just use our calculator above to figure it out for you.