Utility Tools

Online Calculator

Evaluate arithmetic with +, −, ×, ÷, and parentheses. The last five completed results stay in a history list on this page only. Keyboard input works while the calculator is focused and you are not typing in another field.

Your workspace

Runs in your browser

How to use

1Click keys or type numbers and operators.
2Press = or Enter for a result.
3Use history items to reuse a previous result.

What this tool does

— Parentheses
— Five-item history
— Keyboard support

Useful when

— Quick totals
— Checking a unit conversion by hand

Limits

— Not a scientific or financial calculator. Extremely long expressions may fail.

Where processing happens

Expressions are evaluated in the browser. History is not saved after you leave the page.

Questions

Is my calculation stored?+

Only in this page’s memory, and only the last five completed results. Refreshing clears it.

Guides for this tool

How to prepare a freelance invoice and client files
Create a simple invoice PDF, check line-item totals and organize client attachments without an account.
How to create a simple invoice PDF
Line items as description | qty | rate, automatic totals, and the difference between a PDF and bookkeeping software.