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Basic Calculator

A full keypad calculator with memory keys and a running tape.

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Keyboard: digits, + − * /, Enter for equals, Backspace to delete, Esc to clear.

Tape

  1. Completed calculations appear here.

Quick Tool Overview

The Basic Calculator is a four-function desk calculator with memory keys and a running tape. Press the keys or type on your keyboard, read the display, and see every step you took listed beside it so you can show how you got there.

What it does
Adds, subtracts, multiplies and divides with a visible history
You give it
Numbers and operations, by mouse or keyboard
You get back
The running answer plus a copyable tape of every step
Best for
Everyday sums, bills, invoices and quick checks
Calculators Free, unlimited use No sign-up Runs in your browser

About the Basic Calculator

A plain four-function calculator that behaves the way a desk calculator does: press the keys, read the display, and see every step you took listed on the tape beside it.

Full keyboard support is the point. Digits, the operator keys, Enter for equals, Backspace to delete a digit and Escape to clear all work exactly as you would expect, so you can type a sum as fast as you can think it. Memory keys hold a running total between calculations, percent converts the displayed number in place, and the tape keeps a history you can copy into a spreadsheet or an email when someone asks how you got there.

Key features of the Basic Calculator

Full keyboard support

Digits, operators, Enter for equals, Backspace to delete a digit and Escape to clear all, so you can type a sum as fast as you think it.

A running tape

Every step is listed beside the display and can be copied into a spreadsheet or an email when someone asks how you got there.

Memory keys

Hold a running total between calculations the way a desk calculator does.

Percent in place

The percent key converts the displayed number where it stands, for quick discounts and markups.

Nothing to install

Opens instantly in any browser, free and with no sign-up.

How to use the Basic Calculator

  1. 1

    Enter your first number

    Click the keypad or type on your keyboard. Digits, the decimal point and the operators all map to the usual keys.

  2. 2

    Pick an operation

    Choose add, subtract, multiply or divide, then enter the second number.

  3. 3

    Press equals

    Click equals or press Enter. The answer stays on the display, ready to be used in the next calculation.

  4. 4

    Check the tape

    Every completed calculation is listed on the tape so you can retrace or copy your working.

Frequently asked questions

Yes. Number keys, the four operators, Enter for equals, Backspace to delete the last digit and Escape to clear are all wired up, so the whole calculator can be driven from the keyboard.

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