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Simple Calculator

A free basic calculator for everyday sums: add, subtract, multiply, divide and percent. Click the keys or type on your keyboard.

  • Free to use
  • No sign-up
  • Numbers stay in your browser

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Calculator

 
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Click a key, or click the calculator once and type.

What each key does

KeyWhat it does
ACAll clear: wipes everything and starts again
⌫Delete: removes the last thing you typed
%Percent (see the examples below)
+/−Changes the number to negative, or back
+ − × ÷Add, subtract, multiply, divide
=Shows the answer. Press an operator to carry on from it
History (clock)Your last 20 sums, kept in your own browser
CopyCopies the answer to paste anywhere

Press AC to start again. After an answer, press an operator to carry on from it, or a number to start a new sum.

Try these sums

Type thisAnswerShowsUse it
12.5 + 7.2519.75decimals
99 − 47.551.5subtract
25 × 4100multiply
1,000 ÷ 8125divide
5 + 8 + 12 + 1540a long chain
2 + 3 × 414× before +
0.1 + 0.20.3no rounding surprise
1,234.5 × 22,469thousands
1 ÷ 30.333333333310 decimal places
100 ÷ 0Errorcan't divide by 0

Press Use to put a sum into the calculator and see the answer. Every answer here was checked on this calculator.

How the percent key works

The % key works like the one on your phone.

Type thisAnswerMeaningUse it
250 × 15%37.515% of 250
200 + 10%220add 10%
200 − 10%180take off 10%
15% × 801215% of 80
Order of operations: multiplication and division come before addition and subtraction, so 2 + 3 × 4 = 14, not 20.

For more percent sums (percent change, what percent one number is of another), use the Percentage Calculator.

Keyboard shortcuts

PressWhat it does
0 – 9 and .Type the numbers
+ − * /Add, subtract, multiply, divide
Enter or =Show the answer
BackspaceDelete the last thing typed
Esc or DeleteAll clear
%Percent

Good to know

  • Simple, basic and normal calculator all mean the same thing: only the everyday keys.
  • After an answer, press an operator to carry on from it, or a number to start a new sum.
  • Long answers are rounded to 10 decimal places, so 1 ÷ 3 shows 0.3333333333.
  • Dividing by zero shows an error, because it has no answer.

What is included

  • Add, subtract, multiply and divide
  • A percent key that works like your phone
  • Order of operations (2 + 3 × 4 = 14)
  • Keyboard support
  • History of your last 20 sums, and copy
  • Free, with no sign-up

Important to know

Your history stays in your own browser and is never sent anywhere. You can clear it at any time. For sin, cos, logs and powers, use the Scientific Calculator.

Use this free simple calculator, also called a basic or normal calculator, for everyday sums. Add, subtract, multiply and divide, work out percentages, and fix mistakes with the delete key. Click the keys or type on your keyboard, see your recent calculations in the history, and copy the answer with one click. A table explains what each key does, and the sums to try have a Use button that puts them into the calculator. It is free, with no sign-up, and your history stays in your browser.

A simple calculator for everyday sums

This is a basic online calculator with only the keys you need every day: the numbers, add, subtract, multiply and divide, percent, a sign key and delete. It works like the calculator on your phone, but on a bigger screen, and you can use your keyboard as well as the mouse. Use it for shopping totals, bills, splitting costs, quick work sums or checking homework.

How to use it

  1. Enter the first number.
  2. Press +, −, × or ÷.
  3. Enter the next number, and carry on for as many steps as you like.
  4. Press = to see the answer.

The calculator follows the usual order of operations, so multiplication and division are done before addition and subtraction. 2 + 3 × 4 gives 14, not 20. After an answer, press an operator to carry on from it, or a number to start a new sum.

Calculator keys explained

  • AC (all clear) clears everything and starts again.
  • ⌫ deletes the last thing you typed, so you can fix a mistake without starting over.
  • +/− changes the number to negative or back to positive.
  • % works out percentages the way most people expect.

Percentages made easy

200 + 10% = 220 (add 10%)   200 − 10% = 180 (take off 10%)
15% × 80 = 12 (15% of 80)

This makes it quick to add a tip or tax, or take off a discount. For anything more involved, such as percent change or reverse percentages, use the Percentage Calculator.

Keyboard shortcuts

Click the calculator once, then type: numbers and the decimal point, + − * and / for the operators, % for percent, Enter or = for the answer, Backspace to delete and Esc to clear.

History and copying the answer

Open History to see your last 20 sums and tap one to use it again. History is kept only in your browser. The copy button copies the answer so you can paste it into a message, a spreadsheet or a form. Need sin, cos, logs or powers? Use the Scientific Calculator.

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Frequently Asked Questions

How do I use this simple calculator?

Enter a number, press +, −, × or ÷, enter the next number and press =. You can chain as many steps as you like, and the delete key removes the last thing you typed.

What is a simple calculator?

A simple calculator has only the everyday keys: the numbers, add, subtract, multiply, divide, percent, a sign key and delete. It is for quick sums, not for sin, cos, logs or powers.

Is a simple calculator the same as a basic calculator?

Yes. Simple, basic, normal and standard calculator all mean the same thing: a calculator with just the everyday keys. For sin, cos, logs and powers, use the Scientific Calculator.

Does it follow the order of operations?

Yes. Multiplication and division are done before addition and subtraction, so 2 + 3 × 4 = 14, the same as on a scientific calculator.

How does the percent key work?

Like on most phone calculators. 200 + 10% adds 10% of 200 and gives 220, 200 − 10% gives 180, and 15% × 80 gives 12, which is 15% of 80.

How do I find 15% of a number?

Type the number, press ×, type 15 and press %, then =. For example, 250 × 15% = 37.5. You can also type 15% × 80 = 12.

How do I add or subtract a percentage?

Type the number, then + or −, then the percentage and the % key. 200 + 10% = 220 and 200 − 10% = 180. This is handy for a tip, a tax or a discount.

Can I type with my keyboard?

Yes. Click the calculator once, then type the numbers and + − * /. Press Enter for the answer, Backspace to delete and Esc to clear.

What does the AC key do, and what does delete do?

AC (all clear) wipes everything and starts again. The delete key (⌫) only removes the last thing you typed, so you can fix a mistake without starting over.

Can I copy my answer?

Yes. Press the copy button next to the answer and paste it into a message, a spreadsheet or a form.

Are my calculations saved?

Your last 20 calculations are kept in your own browser so you can see them in History. They are not sent anywhere, and you can clear them whenever you like.

Why does it show an error when I divide by zero?

Dividing by zero has no answer, so the calculator shows an error instead of a number. Change the number you are dividing by.

Where can I find sin, cos and log keys?

They are on the Scientific Calculator, which also has powers, roots, brackets and memory keys.