Basic Calculator

Free browser-based tool. Use the controls below to get started.

QUICK GUIDE

Solve a basic arithmetic expression

Enter numbers and choose an operation such as addition, subtraction, multiplication, or division. Example: 18 × 7 should produce 126. Check the displayed expression before using the result.

Enter the first number

Follow the fields and controls shown in the tool above.

Choose an operation and enter the next number

Check the selected settings and input values before continuing.

Calculate, then verify the result

Review the output before copying, saving, or sharing it.

Processing behavior depends on the tool and browser. Do not use confidential or sensitive content unless you have confirmed how that specific tool handles it.

Read the full guide

ABOUT THIS TOOL

About the Basic Calculator

The HandyTools Basic Calculator handles the arithmetic you do every day: adding up a bill, splitting costs, checking a discount, or working out a quick measurement. Enter your numbers, choose an operation and read the result straight away.

It works with the on-screen buttons and, on a computer, with your keyboard. Like every tool on HandyTools it is free and runs in your browser, so there is nothing to install.

Tips for best results

Check the result against a rough estimate; if 18 × 7 should be about 130, a result near 126 is reasonable.
For percentages, discounts or percentage change, the Percentage Calculator is quicker and clearer.
Dividing by zero is not possible, so the calculator shows a message instead of a result.

Frequently asked questions

What can this calculator do?

It performs basic arithmetic: addition, subtraction, multiplication and division with decimals.

Can I use the keyboard?

Yes, on a computer you can type numbers and operators instead of clicking the buttons.

Does it work on mobile?

Yes. The layout adapts to phone screens and the buttons are sized for touch.