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Basic Calculator

Add, subtract, multiply, and divide. Use your keyboard or the buttons below.

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About this tool

A quick check, then back to learning.

This calculator handles basic arithmetic. For graphing, use Desmos or GeoGebra.

Operations run in button order, without multiplication precedence: 2 + 3 × 4 = 20.
Each result is rounded to 12 significant digits; each entry accepts up to 15 digits. This is not exact fraction or symbolic arithmetic.
Use digits, +, -, *, / and the decimal point. Enter evaluates, Escape clears and Backspace deletes. When a button is focused, Enter activates that button.

Try a slope check

For points (1, 2) and (4, 8), write the slope as (8 − 2) ÷ (4 − 1), then enter 6 ÷ 3 = to get 2. The calculator checks the arithmetic; you still need to explain the variables and units.

Practice equations and slope

Independent resource guides for curious learners. Find a useful next step, then get back to learning.

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